gem install output

$ sudo gem install raindrops
Building native extensions.  This could take a while...
ERROR:  Error installing raindrops:
	ERROR: Failed to build gem native extension.

        /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for mmap() in sys/mman.h... yes
checking for munmap() in sys/mman.h... yes
checking for mremap() in sys/mman.h... no
checking for getpagesize() in unistd.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_thread_io_blocking_region()... no
checking for GCC 4+ atomic builtins... yes
creating Makefile

make
gcc -I. -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I. -DHAVE_MMAP -DHAVE_MUNMAP -DHAVE_GETPAGESIZE -DHAVE_GCC_ATOMIC_BUILTINS  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   -c linux_inet_diag.c
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
gcc -I. -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I. -DHAVE_MMAP -DHAVE_MUNMAP -DHAVE_GETPAGESIZE -DHAVE_GCC_ATOMIC_BUILTINS  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -fno-common -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   -c linux_tcp_info.c
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
linux_tcp_info.c:4:23: error: linux/tcp.h: No such file or directory
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
linux_tcp_info.c:4:23: error: linux/tcp.h: No such file or directory
lipo: can't open input file: /var/tmp//cc3G3w2c.out (No such file or directory)
make: *** [linux_tcp_info.o] Error 1


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/raindrops-0.6.0 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/raindrops-0.6.0/ext/raindrops/gem_make.out

mkmf.log

have_func: checking for mmap() in sys/mman.h... -------------------- yes

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
checked program was:
/* begin */
1: #include <sys/mman.h>
2: 
3: /*top*/
4: int main() { return 0; }
5: int t() { void ((*volatile p)()); p = (void ((*)()))mmap; return 0; }
/* end */

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

have_func: checking for munmap() in sys/mman.h... -------------------- yes

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
checked program was:
/* begin */
1: #include <sys/mman.h>
2: 
3: /*top*/
4: int main() { return 0; }
5: int t() { void ((*volatile p)()); p = (void ((*)()))munmap; return 0; }
/* end */

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

have_func: checking for mremap() in sys/mman.h... -------------------- no

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
conftest.c: In function ‘t’:
conftest.c:5: error: ‘mremap’ undeclared (first use in this function)
conftest.c:5: error: (Each undeclared identifier is reported only once
conftest.c:5: error: for each function it appears in.)
conftest.c: In function ‘t’:
conftest.c:5: error: ‘mremap’ undeclared (first use in this function)
conftest.c:5: error: (Each undeclared identifier is reported only once
conftest.c:5: error: for each function it appears in.)
lipo: can't figure out the architecture type of: /var/tmp//ccR7Qqhu.out
checked program was:
/* begin */
1: #include <sys/mman.h>
2: 
3: /*top*/
4: int main() { return 0; }
5: int t() { void ((*volatile p)()); p = (void ((*)()))mremap; return 0; }
/* end */

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
Undefined symbols for architecture i386:
  "_mremap", referenced from:
      _t in ccN7AB9F.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
Undefined symbols for architecture x86_64:
  "_mremap", referenced from:
      _t in ccF0hgam.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccM1zTHe.out (No such file or directory)
checked program was:
/* begin */
1: #include <sys/mman.h>
2: 
3: /*top*/
4: int main() { return 0; }
5: int t() { mremap(); return 0; }
/* end */

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

have_func: checking for getpagesize() in unistd.h... -------------------- yes

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
checked program was:
/* begin */
1: #include <unistd.h>
2: 
3: /*top*/
4: int main() { return 0; }
5: int t() { void ((*volatile p)()); p = (void ((*)()))getpagesize; return 0; }
/* end */

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

have_func: checking for rb_thread_blocking_region()... -------------------- no

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
conftest.c: In function ‘t’:
conftest.c:3: error: ‘rb_thread_blocking_region’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
conftest.c: In function ‘t’:
conftest.c:3: error: ‘rb_thread_blocking_region’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
lipo: can't figure out the architecture type of: /var/tmp//cci1Gavx.out
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_blocking_region; return 0; }
/* end */

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
Undefined symbols for architecture i386:
  "_rb_thread_blocking_region", referenced from:
      _t in ccrdXvFs.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
Undefined symbols for architecture x86_64:
  "_rb_thread_blocking_region", referenced from:
      _t in ccvKOFt3.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccsQeLB1.out (No such file or directory)
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_thread_blocking_region(); return 0; }
/* end */

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

have_func: checking for rb_thread_io_blocking_region()... -------------------- no

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
conftest.c: In function ‘t’:
conftest.c:3: error: ‘rb_thread_io_blocking_region’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
conftest.c: In function ‘t’:
conftest.c:3: error: ‘rb_thread_io_blocking_region’ undeclared (first use in this function)
conftest.c:3: error: (Each undeclared identifier is reported only once
conftest.c:3: error: for each function it appears in.)
lipo: can't figure out the architecture type of: /var/tmp//cc5ijRHX.out
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { void ((*volatile p)()); p = (void ((*)()))rb_thread_io_blocking_region; return 0; }
/* end */

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
Undefined symbols for architecture i386:
  "_rb_thread_io_blocking_region", referenced from:
      _t in ccbzJNw7.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
Undefined symbols for architecture x86_64:
  "_rb_thread_io_blocking_region", referenced from:
      _t in cc7YfZrk.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccRSsrZS.out (No such file or directory)
checked program was:
/* begin */
1: /*top*/
2: int main() { return 0; }
3: int t() { rb_thread_io_blocking_region(); return 0; }
/* end */

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

checking for GCC 4+ atomic builtins... -------------------- yes

"gcc -o conftest -I. -I/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/universal-darwin10.0 -I.  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -D_GNU_SOURCE  -D_BSD_SOURCE -D_XOPEN_SOURCE=600  -arch i386 -arch x86_64 -g -Os -pipe -fno-common -DENABLE_DTRACE  -fno-common  -pipe -fno-common   conftest.c  -L. -L/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib -L. -arch i386 -arch x86_64      -lruby  -lpthread -ldl  "
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
<command-line>: warning: "_XOPEN_SOURCE" redefined
<command-line>: warning: this is the location of the previous definition
checked program was:
/* begin */
1: int main(int argc, char * const argv[]) {
2:         volatile unsigned long i = 0;
3:         __sync_add_and_fetch(&i, argc);
4:         __sync_sub_and_fetch(&i, argc);
5:         return 0;
6: }
/* end */

./conftest
--------------------