TomyLobo/console-output.txt Secret

## console-output.txt
This ran on the prompt that appears if you click "Start Command Prompt with Ruby":
C:\blah\blah>gem install ruby-odbc
Building native extensions.  This could take a while...
ERROR:  Error installing ruby-odbc:
        ERROR: Failed to build gem native extension.

    current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
C:/Ruby24-x64/bin/ruby.exe -r ./siteconf20171205-6916-zolkgo.rb extconf.rb
checking for version.h... no
checking for sql.h... yes
checking for sqlext.h... yes
checking for SQLTCHAR in windows.h,sqltypes.h... yes
checking for SQLLEN in windows.h,sqltypes.h... yes
checking for SQLULEN in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for SQLROWOFFSET in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for SQLROWSETSIZE in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for () in -lodbc32... no
checking for () in -lodbccp32... no
checking for () in -luser32... no
creating Makefile

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
make "DESTDIR=" clean

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
make "DESTDIR="
generating odbc-x64-mingw32.def
compiling init.c
compiling odbc.c
In file included from C:/Ruby24-x64/include/ruby-2.4.0/ruby/win32.h:41:0,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby/defines.h:243,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby/ruby.h:36,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby.h:33,
                 from odbc.c:21:
C:/msys64/mingw64/x86_64-w64-mingw32/include/winsock2.h:15:2: warning: #warning Please include winsock2.h before windows.h [-Wcpp]
 #warning Please include winsock2.h before windows.h
  ^~~~~~~
linking shared-object odbc.so
odbc.o:odbc.c:(.text+0x1ee): undefined reference to `SQLError'
odbc.o:odbc.c:(.text+0x748): undefined reference to `SQLExecute'
odbc.o:odbc.c:(.text+0x818): undefined reference to `SQLDisconnect'
odbc.o:odbc.c:(.text+0x1950): undefined reference to `SQLFetchScroll'
odbc.o:odbc.c:(.text+0x1968): undefined reference to `SQLFetch'
odbc.o:odbc.c:(.text+0x1990): undefined reference to `SQLExecDirect'
odbc.o:odbc.c:(.text+0x19b0): undefined reference to `SQLPrepare'
odbc.o:odbc.c:(.text+0x19ff): undefined reference to `SQLTables'
odbc.o:odbc.c:(.text+0x1a4f): undefined reference to `SQLColumns'
odbc.o:odbc.c:(.text+0x1a8e): undefined reference to `SQLPrimaryKeys'
odbc.o:odbc.c:(.text+0x1ade): undefined reference to `SQLStatistics'
odbc.o:odbc.c:(.text+0x1afc): undefined reference to `SQLGetTypeInfo'
odbc.o:odbc.c:(.text+0x1b71): undefined reference to `SQLForeignKeys'
odbc.o:odbc.c:(.text+0x1bae): undefined reference to `SQLTablePrivileges'
odbc.o:odbc.c:(.text+0x1bee): undefined reference to `SQLProcedures'
odbc.o:odbc.c:(.text+0x1c3f): undefined reference to `SQLProcedureColumns'
odbc.o:odbc.c:(.text+0x1c97): undefined reference to `SQLSpecialColumns'
odbc.o:odbc.c:(.text+0x1ce7): undefined reference to `SQLDriverConnect'
odbc.o:odbc.c:(.text+0x1d2e): undefined reference to `SQLConnect'
odbc.o:odbc.c:(.text+0x1de1): undefined reference to `SQLReadFileDSN'
odbc.o:odbc.c:(.text+0x1f0d): undefined reference to `SQLWriteFileDSN'
odbc.o:odbc.c:(.text+0x1f84): undefined reference to `SQLEndTran'
odbc.o:odbc.c:(.text+0x22c1): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x23ae): undefined reference to `SQLDescribeParam'
odbc.o:odbc.c:(.text+0x24da): undefined reference to `SQLNumParams'
odbc.o:odbc.c:(.text+0x2eda): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x2fb9): undefined reference to `SQLSetEnvAttr'
odbc.o:odbc.c:(.text+0x300b): undefined reference to `SQLGetEnvAttr'
odbc.o:odbc.c:(.text+0x30de): undefined reference to `SQLRowCount'
odbc.o:odbc.c:(.text+0x4c25): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4cc0): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4d58): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4dd7): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4e54): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4ec8): more undefined references to `SQLColAttributes' follow
odbc.o:odbc.c:(.text+0x5345): undefined reference to `SQLConfigDataSource'
odbc.o:odbc.c:(.text+0x58d3): undefined reference to `SQLError'
odbc.o:odbc.c:(.text+0x5a32): undefined reference to `SQLGetData'
odbc.o:odbc.c:(.text+0x5f2d): undefined reference to `SQLGetData'
odbc.o:odbc.c:(.text+0x6343): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x640f): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x6594): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x668d): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x71e3): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x727f): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x72c6): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x7358): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x738d): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x7504): undefined reference to `SQLNumResultCols'
odbc.o:odbc.c:(.text+0x77e2): undefined reference to `SQLFreeEnv'
odbc.o:odbc.c:(.text+0x78cb): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x790c): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x79f9): undefined reference to `SQLNumParams'
odbc.o:odbc.c:(.text+0x7af9): undefined reference to `SQLNumResultCols'
odbc.o:odbc.c:(.text+0x7b4e): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x7d51): undefined reference to `SQLMoreResults'
odbc.o:odbc.c:(.text+0x7eea): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x852a): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8681): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x86e6): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x87e1): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x8912): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8984): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x89e1): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8a19): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x8dcd): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9733): undefined reference to `SQLAllocEnv'
odbc.o:odbc.c:(.text+0x9868): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9a4d): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9bdc): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9cd5): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9da9): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9ee5): undefined reference to `SQLDrivers'
odbc.o:odbc.c:(.text+0xa1e5): undefined reference to `SQLDataSources'
odbc.o:odbc.c:(.text+0xa41f): undefined reference to `SQLSetCursorName'
odbc.o:odbc.c:(.text+0xa4b8): undefined reference to `SQLGetCursorName'
odbc.o:odbc.c:(.text+0xa729): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xa7a0): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xa8e7): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xacef): undefined reference to `SQLBindParameter'
odbc.o:odbc.c:(.text+0xb3a6): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb3d7): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb48c): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb57b): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb5ea): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb9ef): undefined reference to `SQLSetStmtOption'
odbc.o:odbc.c:(.text+0xbb1d): undefined reference to `SQLGetConnectOption'
odbc.o:odbc.c:(.text+0xbc19): undefined reference to `SQLSetConnectOption'
odbc.o:odbc.c:(.text+0xbce2): undefined reference to `SQLGetStmtOption'
odbc.o:odbc.c:(.text+0x714): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x724): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x734): undefined reference to `SQLCancel'
collect2.exe: error: ld returned 1 exit status
make: *** [Makefile:259: odbc.so] Error 1

make failed, exit code 2

Gem files will remain installed in C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998 for inspection.
Results logged to C:/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/ruby-odbc-0.99998/gem_make.out

## gem_make.out
current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
C:/Ruby24-x64/bin/ruby.exe -r ./siteconf20171205-6916-zolkgo.rb extconf.rb
checking for version.h... no
checking for sql.h... yes
checking for sqlext.h... yes
checking for SQLTCHAR in windows.h,sqltypes.h... yes
checking for SQLLEN in windows.h,sqltypes.h... yes
checking for SQLULEN in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for SQLROWOFFSET in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for SQLROWSETSIZE in windows.h,sqltypes.h... yes
checking for odbcinst.h... yes
checking for () in -lodbc32... no
checking for () in -lodbccp32... no
checking for () in -luser32... no
creating Makefile

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
make "DESTDIR=" clean

current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
make "DESTDIR="
generating odbc-x64-mingw32.def
compiling init.c
compiling odbc.c
In file included from C:/Ruby24-x64/include/ruby-2.4.0/ruby/win32.h:41:0,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby/defines.h:243,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby/ruby.h:36,
                 from C:/Ruby24-x64/include/ruby-2.4.0/ruby.h:33,
                 from odbc.c:21:
C:/msys64/mingw64/x86_64-w64-mingw32/include/winsock2.h:15:2: warning: #warning Please include winsock2.h before windows.h [-Wcpp]
 #warning Please include winsock2.h before windows.h
  ^~~~~~~
linking shared-object odbc.so
odbc.o:odbc.c:(.text+0x1ee): undefined reference to `SQLError'
odbc.o:odbc.c:(.text+0x748): undefined reference to `SQLExecute'
odbc.o:odbc.c:(.text+0x818): undefined reference to `SQLDisconnect'
odbc.o:odbc.c:(.text+0x1950): undefined reference to `SQLFetchScroll'
odbc.o:odbc.c:(.text+0x1968): undefined reference to `SQLFetch'
odbc.o:odbc.c:(.text+0x1990): undefined reference to `SQLExecDirect'
odbc.o:odbc.c:(.text+0x19b0): undefined reference to `SQLPrepare'
odbc.o:odbc.c:(.text+0x19ff): undefined reference to `SQLTables'
odbc.o:odbc.c:(.text+0x1a4f): undefined reference to `SQLColumns'
odbc.o:odbc.c:(.text+0x1a8e): undefined reference to `SQLPrimaryKeys'
odbc.o:odbc.c:(.text+0x1ade): undefined reference to `SQLStatistics'
odbc.o:odbc.c:(.text+0x1afc): undefined reference to `SQLGetTypeInfo'
odbc.o:odbc.c:(.text+0x1b71): undefined reference to `SQLForeignKeys'
odbc.o:odbc.c:(.text+0x1bae): undefined reference to `SQLTablePrivileges'
odbc.o:odbc.c:(.text+0x1bee): undefined reference to `SQLProcedures'
odbc.o:odbc.c:(.text+0x1c3f): undefined reference to `SQLProcedureColumns'
odbc.o:odbc.c:(.text+0x1c97): undefined reference to `SQLSpecialColumns'
odbc.o:odbc.c:(.text+0x1ce7): undefined reference to `SQLDriverConnect'
odbc.o:odbc.c:(.text+0x1d2e): undefined reference to `SQLConnect'
odbc.o:odbc.c:(.text+0x1de1): undefined reference to `SQLReadFileDSN'
odbc.o:odbc.c:(.text+0x1f0d): undefined reference to `SQLWriteFileDSN'
odbc.o:odbc.c:(.text+0x1f84): undefined reference to `SQLEndTran'
odbc.o:odbc.c:(.text+0x22c1): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x23ae): undefined reference to `SQLDescribeParam'
odbc.o:odbc.c:(.text+0x24da): undefined reference to `SQLNumParams'
odbc.o:odbc.c:(.text+0x2eda): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x2fb9): undefined reference to `SQLSetEnvAttr'
odbc.o:odbc.c:(.text+0x300b): undefined reference to `SQLGetEnvAttr'
odbc.o:odbc.c:(.text+0x30de): undefined reference to `SQLRowCount'
odbc.o:odbc.c:(.text+0x4c25): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4cc0): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4d58): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4dd7): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4e54): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x4ec8): more undefined references to `SQLColAttributes' follow
odbc.o:odbc.c:(.text+0x5345): undefined reference to `SQLConfigDataSource'
odbc.o:odbc.c:(.text+0x58d3): undefined reference to `SQLError'
odbc.o:odbc.c:(.text+0x5a32): undefined reference to `SQLGetData'
odbc.o:odbc.c:(.text+0x5f2d): undefined reference to `SQLGetData'
odbc.o:odbc.c:(.text+0x6343): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x640f): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x6594): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x668d): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x71e3): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x727f): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x72c6): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x7358): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x738d): undefined reference to `SQLColAttributes'
odbc.o:odbc.c:(.text+0x7504): undefined reference to `SQLNumResultCols'
odbc.o:odbc.c:(.text+0x77e2): undefined reference to `SQLFreeEnv'
odbc.o:odbc.c:(.text+0x78cb): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x790c): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x79f9): undefined reference to `SQLNumParams'
odbc.o:odbc.c:(.text+0x7af9): undefined reference to `SQLNumResultCols'
odbc.o:odbc.c:(.text+0x7b4e): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x7d51): undefined reference to `SQLMoreResults'
odbc.o:odbc.c:(.text+0x7eea): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x852a): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8681): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x86e6): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x87e1): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x8912): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8984): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x89e1): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0x8a19): undefined reference to `SQLAllocStmt'
odbc.o:odbc.c:(.text+0x8dcd): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9733): undefined reference to `SQLAllocEnv'
odbc.o:odbc.c:(.text+0x9868): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9a4d): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9bdc): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9cd5): undefined reference to `SQLAllocConnect'
odbc.o:odbc.c:(.text+0x9da9): undefined reference to `SQLFreeConnect'
odbc.o:odbc.c:(.text+0x9ee5): undefined reference to `SQLDrivers'
odbc.o:odbc.c:(.text+0xa1e5): undefined reference to `SQLDataSources'
odbc.o:odbc.c:(.text+0xa41f): undefined reference to `SQLSetCursorName'
odbc.o:odbc.c:(.text+0xa4b8): undefined reference to `SQLGetCursorName'
odbc.o:odbc.c:(.text+0xa729): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xa7a0): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xa8e7): undefined reference to `SQLGetInfo'
odbc.o:odbc.c:(.text+0xacef): undefined reference to `SQLBindParameter'
odbc.o:odbc.c:(.text+0xb3a6): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb3d7): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb48c): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb57b): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb5ea): undefined reference to `SQLFreeStmt'
odbc.o:odbc.c:(.text+0xb9ef): undefined reference to `SQLSetStmtOption'
odbc.o:odbc.c:(.text+0xbb1d): undefined reference to `SQLGetConnectOption'
odbc.o:odbc.c:(.text+0xbc19): undefined reference to `SQLSetConnectOption'
odbc.o:odbc.c:(.text+0xbce2): undefined reference to `SQLGetStmtOption'
odbc.o:odbc.c:(.text+0x714): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x724): undefined reference to `SQLCancel'
odbc.o:odbc.c:(.text+0x734): undefined reference to `SQLCancel'
collect2.exe: error: ld returned 1 exit status
make: *** [Makefile:259: odbc.so] Error 1

make failed, exit code 2

## mkmf.log
have_header: checking for version.h... -------------------- no

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: int main(int argc, char **argv)
6: {
7:   return 0;
8: }
/* end */

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
conftest.c:5:10: fatal error: version.h: No such file or directory
 #include <version.h>
          ^~~~~~~~~~~
compilation terminated.
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <version.h>
/* end */

--------------------

have_header: checking for sql.h... -------------------- yes

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <sql.h>
/* end */

--------------------

have_header: checking for sqlext.h... -------------------- yes

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <sqlext.h>
/* end */

--------------------

have_type: checking for SQLTCHAR in windows.h,sqltypes.h... -------------------- yes

"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe   -c conftest.c"
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5: #include <windows.h>
 6: #include <sqltypes.h>
 7:
 8: /*top*/
 9: typedef SQLTCHAR conftest_type;
10: int conftestval[sizeof(conftest_type)?1:-1];
/* end */

--------------------

have_type: checking for SQLLEN in windows.h,sqltypes.h... -------------------- yes

"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe   -c conftest.c"
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5: #include <windows.h>
 6: #include <sqltypes.h>
 7:
 8: /*top*/
 9: typedef SQLLEN conftest_type;
10: int conftestval[sizeof(conftest_type)?1:-1];
/* end */

--------------------

have_type: checking for SQLULEN in windows.h,sqltypes.h... -------------------- yes

"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe   -c conftest.c"
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5: #include <windows.h>
 6: #include <sqltypes.h>
 7:
 8: /*top*/
 9: typedef SQLULEN conftest_type;
10: int conftestval[sizeof(conftest_type)?1:-1];
/* end */

--------------------

have_header: checking for odbcinst.h... -------------------- yes

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <odbcinst.h>
/* end */

--------------------

have_type: checking for SQLROWOFFSET in windows.h,sqltypes.h... -------------------- yes

"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe   -c conftest.c"
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5: #include <windows.h>
 6: #include <sqltypes.h>
 7:
 8: /*top*/
 9: typedef SQLROWOFFSET conftest_type;
10: int conftestval[sizeof(conftest_type)?1:-1];
/* end */

--------------------

have_header: checking for odbcinst.h... -------------------- yes

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <odbcinst.h>
/* end */

--------------------

have_type: checking for SQLROWSETSIZE in windows.h,sqltypes.h... -------------------- yes

"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe   -c conftest.c"
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5: #include <windows.h>
 6: #include <sqltypes.h>
 7:
 8: /*top*/
 9: typedef SQLROWSETSIZE conftest_type;
10: int conftestval[sizeof(conftest_type)?1:-1];
/* end */

--------------------

have_header: checking for odbcinst.h... -------------------- yes

"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2:
3: #include <winsock2.h>
4: #include <windows.h>
5: #include <odbcinst.h>
/* end */

--------------------

have_library: checking for () in -lodbc32... -------------------- no

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -lodbc32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c: In function 't':
conftest.c:16:57: error: expected expression before ';' token
 int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
                                                         ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
/* end */

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -lodbc32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c:16:14: error: expected identifier or '(' before ')' token
 extern void ();
              ^
conftest.c: In function 't':
conftest.c:17:16: error: expected expression before ')' token
 int t(void) { (); return 0; }
                ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: extern void ();
17: int t(void) { (); return 0; }
/* end */

--------------------

have_library: checking for () in -lodbccp32... -------------------- no

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -lodbccp32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c: In function 't':
conftest.c:16:57: error: expected expression before ';' token
 int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
                                                         ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
/* end */

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -lodbccp32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c:16:14: error: expected identifier or '(' before ')' token
 extern void ();
              ^
conftest.c: In function 't':
conftest.c:17:16: error: expected expression before ')' token
 int t(void) { (); return 0; }
                ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: extern void ();
17: int t(void) { (); return 0; }
/* end */

--------------------

have_library: checking for () in -luser32... -------------------- no

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -luser32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c: In function 't':
conftest.c:16:57: error: expected expression before ';' token
 int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
                                                         ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)())); return !p; }
/* end */

"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64  -march=x86-64 -mtune=generic -O2 -pipe conftest.c  -L. -LC:/Ruby24-x64/lib -L. -pipe     -lx64-msvcrt-ruby240 -luser32  -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi  "
conftest.c:16:14: error: expected identifier or '(' before ')' token
 extern void ();
              ^
conftest.c: In function 't':
conftest.c:17:16: error: expected expression before ')' token
 int t(void) { (); return 0; }
                ^
checked program was:
/* begin */
 1: #include "ruby.h"
 2:
 3: #include <winsock2.h>
 4: #include <windows.h>
 5:
 6: /*top*/
 7: extern int t(void);
 8: int main(int argc, char **argv)
 9: {
10:   if (argc > 1000000) {
11:     printf("%p", &t);
12:   }
13:
14:   return 0;
15: }
16: extern void ();
17: int t(void) { (); return 0; }
/* end */

--------------------
	This ran on the prompt that appears if you click "Start Command Prompt with Ruby":
	C:\blah\blah>gem install ruby-odbc
	Building native extensions. This could take a while...
	ERROR: Error installing ruby-odbc:
	ERROR: Failed to build gem native extension.

	current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
	C:/Ruby24-x64/bin/ruby.exe -r ./siteconf20171205-6916-zolkgo.rb extconf.rb
	checking for version.h... no
	checking for sql.h... yes
	checking for sqlext.h... yes
	checking for SQLTCHAR in windows.h,sqltypes.h... yes
	checking for SQLLEN in windows.h,sqltypes.h... yes
	checking for SQLULEN in windows.h,sqltypes.h... yes
	checking for odbcinst.h... yes
	checking for SQLROWOFFSET in windows.h,sqltypes.h... yes
	checking for odbcinst.h... yes
	checking for SQLROWSETSIZE in windows.h,sqltypes.h... yes
	checking for odbcinst.h... yes
	checking for () in -lodbc32... no
	checking for () in -lodbccp32... no
	checking for () in -luser32... no
	creating Makefile

	current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
	make "DESTDIR=" clean

	current directory: C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998/ext
	make "DESTDIR="
	generating odbc-x64-mingw32.def
	compiling init.c
	compiling odbc.c
	In file included from C:/Ruby24-x64/include/ruby-2.4.0/ruby/win32.h:41:0,
	from C:/Ruby24-x64/include/ruby-2.4.0/ruby/defines.h:243,
	from C:/Ruby24-x64/include/ruby-2.4.0/ruby/ruby.h:36,
	from C:/Ruby24-x64/include/ruby-2.4.0/ruby.h:33,
	from odbc.c:21:
	C:/msys64/mingw64/x86_64-w64-mingw32/include/winsock2.h:15:2: warning: #warning Please include winsock2.h before windows.h [-Wcpp]
	#warning Please include winsock2.h before windows.h
	^~~~~~~
	linking shared-object odbc.so
	odbc.o:odbc.c:(.text+0x1ee): undefined reference to `SQLError'
	odbc.o:odbc.c:(.text+0x748): undefined reference to `SQLExecute'
	odbc.o:odbc.c:(.text+0x818): undefined reference to `SQLDisconnect'
	odbc.o:odbc.c:(.text+0x1950): undefined reference to `SQLFetchScroll'
	odbc.o:odbc.c:(.text+0x1968): undefined reference to `SQLFetch'
	odbc.o:odbc.c:(.text+0x1990): undefined reference to `SQLExecDirect'
	odbc.o:odbc.c:(.text+0x19b0): undefined reference to `SQLPrepare'
	odbc.o:odbc.c:(.text+0x19ff): undefined reference to `SQLTables'
	odbc.o:odbc.c:(.text+0x1a4f): undefined reference to `SQLColumns'
	odbc.o:odbc.c:(.text+0x1a8e): undefined reference to `SQLPrimaryKeys'
	odbc.o:odbc.c:(.text+0x1ade): undefined reference to `SQLStatistics'
	odbc.o:odbc.c:(.text+0x1afc): undefined reference to `SQLGetTypeInfo'
	odbc.o:odbc.c:(.text+0x1b71): undefined reference to `SQLForeignKeys'
	odbc.o:odbc.c:(.text+0x1bae): undefined reference to `SQLTablePrivileges'
	odbc.o:odbc.c:(.text+0x1bee): undefined reference to `SQLProcedures'
	odbc.o:odbc.c:(.text+0x1c3f): undefined reference to `SQLProcedureColumns'
	odbc.o:odbc.c:(.text+0x1c97): undefined reference to `SQLSpecialColumns'
	odbc.o:odbc.c:(.text+0x1ce7): undefined reference to `SQLDriverConnect'
	odbc.o:odbc.c:(.text+0x1d2e): undefined reference to `SQLConnect'
	odbc.o:odbc.c:(.text+0x1de1): undefined reference to `SQLReadFileDSN'
	odbc.o:odbc.c:(.text+0x1f0d): undefined reference to `SQLWriteFileDSN'
	odbc.o:odbc.c:(.text+0x1f84): undefined reference to `SQLEndTran'
	odbc.o:odbc.c:(.text+0x22c1): undefined reference to `SQLCancel'
	odbc.o:odbc.c:(.text+0x23ae): undefined reference to `SQLDescribeParam'
	odbc.o:odbc.c:(.text+0x24da): undefined reference to `SQLNumParams'
	odbc.o:odbc.c:(.text+0x2eda): undefined reference to `SQLAllocStmt'
	odbc.o:odbc.c:(.text+0x2fb9): undefined reference to `SQLSetEnvAttr'
	odbc.o:odbc.c:(.text+0x300b): undefined reference to `SQLGetEnvAttr'
	odbc.o:odbc.c:(.text+0x30de): undefined reference to `SQLRowCount'
	odbc.o:odbc.c:(.text+0x4c25): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x4cc0): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x4d58): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x4dd7): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x4e54): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x4ec8): more undefined references to `SQLColAttributes' follow
	odbc.o:odbc.c:(.text+0x5345): undefined reference to `SQLConfigDataSource'
	odbc.o:odbc.c:(.text+0x58d3): undefined reference to `SQLError'
	odbc.o:odbc.c:(.text+0x5a32): undefined reference to `SQLGetData'
	odbc.o:odbc.c:(.text+0x5f2d): undefined reference to `SQLGetData'
	odbc.o:odbc.c:(.text+0x6343): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x640f): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x6594): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x668d): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x71e3): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x727f): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x72c6): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x7358): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x738d): undefined reference to `SQLColAttributes'
	odbc.o:odbc.c:(.text+0x7504): undefined reference to `SQLNumResultCols'
	odbc.o:odbc.c:(.text+0x77e2): undefined reference to `SQLFreeEnv'
	odbc.o:odbc.c:(.text+0x78cb): undefined reference to `SQLFreeConnect'
	odbc.o:odbc.c:(.text+0x790c): undefined reference to `SQLFreeConnect'
	odbc.o:odbc.c:(.text+0x79f9): undefined reference to `SQLNumParams'
	odbc.o:odbc.c:(.text+0x7af9): undefined reference to `SQLNumResultCols'
	odbc.o:odbc.c:(.text+0x7b4e): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x7d51): undefined reference to `SQLMoreResults'
	odbc.o:odbc.c:(.text+0x7eea): undefined reference to `SQLAllocStmt'
	odbc.o:odbc.c:(.text+0x852a): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x8681): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x86e6): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x87e1): undefined reference to `SQLAllocStmt'
	odbc.o:odbc.c:(.text+0x8912): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x8984): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x89e1): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0x8a19): undefined reference to `SQLAllocStmt'
	odbc.o:odbc.c:(.text+0x8dcd): undefined reference to `SQLFreeConnect'
	odbc.o:odbc.c:(.text+0x9733): undefined reference to `SQLAllocEnv'
	odbc.o:odbc.c:(.text+0x9868): undefined reference to `SQLAllocConnect'
	odbc.o:odbc.c:(.text+0x9a4d): undefined reference to `SQLFreeConnect'
	odbc.o:odbc.c:(.text+0x9bdc): undefined reference to `SQLAllocConnect'
	odbc.o:odbc.c:(.text+0x9cd5): undefined reference to `SQLAllocConnect'
	odbc.o:odbc.c:(.text+0x9da9): undefined reference to `SQLFreeConnect'
	odbc.o:odbc.c:(.text+0x9ee5): undefined reference to `SQLDrivers'
	odbc.o:odbc.c:(.text+0xa1e5): undefined reference to `SQLDataSources'
	odbc.o:odbc.c:(.text+0xa41f): undefined reference to `SQLSetCursorName'
	odbc.o:odbc.c:(.text+0xa4b8): undefined reference to `SQLGetCursorName'
	odbc.o:odbc.c:(.text+0xa729): undefined reference to `SQLGetInfo'
	odbc.o:odbc.c:(.text+0xa7a0): undefined reference to `SQLGetInfo'
	odbc.o:odbc.c:(.text+0xa8e7): undefined reference to `SQLGetInfo'
	odbc.o:odbc.c:(.text+0xacef): undefined reference to `SQLBindParameter'
	odbc.o:odbc.c:(.text+0xb3a6): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0xb3d7): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0xb48c): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0xb57b): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0xb5ea): undefined reference to `SQLFreeStmt'
	odbc.o:odbc.c:(.text+0xb9ef): undefined reference to `SQLSetStmtOption'
	odbc.o:odbc.c:(.text+0xbb1d): undefined reference to `SQLGetConnectOption'
	odbc.o:odbc.c:(.text+0xbc19): undefined reference to `SQLSetConnectOption'
	odbc.o:odbc.c:(.text+0xbce2): undefined reference to `SQLGetStmtOption'
	odbc.o:odbc.c:(.text+0x714): undefined reference to `SQLCancel'
	odbc.o:odbc.c:(.text+0x724): undefined reference to `SQLCancel'
	odbc.o:odbc.c:(.text+0x734): undefined reference to `SQLCancel'
	collect2.exe: error: ld returned 1 exit status
	make: *** [Makefile:259: odbc.so] Error 1

	make failed, exit code 2

	Gem files will remain installed in C:/Ruby24-x64/lib/ruby/gems/2.4.0/gems/ruby-odbc-0.99998 for inspection.
	Results logged to C:/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/ruby-odbc-0.99998/gem_make.out
	have_header: checking for version.h... -------------------- no

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: int main(int argc, char **argv)
	6: {
	7: return 0;
	8: }
	/* end */

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	conftest.c:5:10: fatal error: version.h: No such file or directory
	#include <version.h>
	^~~~~~~~~~~
	compilation terminated.
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <version.h>
	/* end */

	--------------------

	have_header: checking for sql.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <sql.h>
	/* end */

	--------------------

	have_header: checking for sqlext.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <sqlext.h>
	/* end */

	--------------------

	have_type: checking for SQLTCHAR in windows.h,sqltypes.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe -c conftest.c"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <windows.h>
	6: #include <sqltypes.h>
	7:
	8: /top/
	9: typedef SQLTCHAR conftest_type;
	10: int conftestval[sizeof(conftest_type)?1:-1];
	/* end */

	--------------------

	have_type: checking for SQLLEN in windows.h,sqltypes.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe -c conftest.c"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <windows.h>
	6: #include <sqltypes.h>
	7:
	8: /top/
	9: typedef SQLLEN conftest_type;
	10: int conftestval[sizeof(conftest_type)?1:-1];
	/* end */

	--------------------

	have_type: checking for SQLULEN in windows.h,sqltypes.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe -c conftest.c"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <windows.h>
	6: #include <sqltypes.h>
	7:
	8: /top/
	9: typedef SQLULEN conftest_type;
	10: int conftestval[sizeof(conftest_type)?1:-1];
	/* end */

	--------------------

	have_header: checking for odbcinst.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <odbcinst.h>
	/* end */

	--------------------

	have_type: checking for SQLROWOFFSET in windows.h,sqltypes.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe -c conftest.c"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <windows.h>
	6: #include <sqltypes.h>
	7:
	8: /top/
	9: typedef SQLROWOFFSET conftest_type;
	10: int conftestval[sizeof(conftest_type)?1:-1];
	/* end */

	--------------------

	have_header: checking for odbcinst.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <odbcinst.h>
	/* end */

	--------------------

	have_type: checking for SQLROWSETSIZE in windows.h,sqltypes.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe -c conftest.c"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <windows.h>
	6: #include <sqltypes.h>
	7:
	8: /top/
	9: typedef SQLROWSETSIZE conftest_type;
	10: int conftestval[sizeof(conftest_type)?1:-1];
	/* end */

	--------------------

	have_header: checking for odbcinst.h... -------------------- yes

	"x86_64-w64-mingw32-gcc -E -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -o conftest.i"
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5: #include <odbcinst.h>
	/* end */

	--------------------

	have_library: checking for () in -lodbc32... -------------------- no

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -lodbc32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c: In function 't':
	conftest.c:16:57: error: expected expression before ';' token
	int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	/* end */

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -lodbc32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c:16:14: error: expected identifier or '(' before ')' token
	extern void ();
	^
	conftest.c: In function 't':
	conftest.c:17:16: error: expected expression before ')' token
	int t(void) { (); return 0; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: extern void ();
	17: int t(void) { (); return 0; }
	/* end */

	--------------------

	have_library: checking for () in -lodbccp32... -------------------- no

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -lodbccp32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c: In function 't':
	conftest.c:16:57: error: expected expression before ';' token
	int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	/* end */

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -lodbccp32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c:16:14: error: expected identifier or '(' before ')' token
	extern void ();
	^
	conftest.c: In function 't':
	conftest.c:17:16: error: expected expression before ')' token
	int t(void) { (); return 0; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: extern void ();
	17: int t(void) { (); return 0; }
	/* end */

	--------------------

	have_library: checking for () in -luser32... -------------------- no

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -luser32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c: In function 't':
	conftest.c:16:57: error: expected expression before ';' token
	int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: int t(void) { void ((volatile p)()); p = (void (()())); return !p; }
	/* end */

	"x86_64-w64-mingw32-gcc -o conftest.exe -IC:/Ruby24-x64/include/ruby-2.4.0/x64-mingw32 -IC:/Ruby24-x64/include/ruby-2.4.0/ruby/backward -IC:/Ruby24-x64/include/ruby-2.4.0 -I. -D_FORTIFY_SOURCE=2 -D__USE_MINGW_ANSI_STDIO=1 -DFD_SETSIZE=2048 -D_WIN32_WINNT=0x0501 -D__MINGW_USE_VC2005_COMPAT -D_FILE_OFFSET_BITS=64 -march=x86-64 -mtune=generic -O2 -pipe conftest.c -L. -LC:/Ruby24-x64/lib -L. -pipe -lx64-msvcrt-ruby240 -luser32 -lgmp -lshell32 -lws2_32 -liphlpapi -limagehlp -lshlwapi "
	conftest.c:16:14: error: expected identifier or '(' before ')' token
	extern void ();
	^
	conftest.c: In function 't':
	conftest.c:17:16: error: expected expression before ')' token
	int t(void) { (); return 0; }
	^
	checked program was:
	/* begin */
	1: #include "ruby.h"
	2:
	3: #include <winsock2.h>
	4: #include <windows.h>
	5:
	6: /top/
	7: extern int t(void);
	8: int main(int argc, char **argv)
	9: {
	10: if (argc > 1000000) {
	11: printf("%p", &t);
	12: }
	13:
	14: return 0;
	15: }
	16: extern void ();
	17: int t(void) { (); return 0; }
	/* end */

	--------------------