GCC verbose output of a compile on Windows with OpenEmbedded MinGW SDK

MinGW gcc verbose output 2013-09-03

make: Entering directory `F:/workspace_4.3/TestOeSdk/Debug'
'Building target: TestOeSdk'
'Invoking: Cross GCC Linker'
arm-oe-linux-gnueabi-gcc -L"F:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib" -L"F:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\lib" -L"F:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib\arm-oe-linux-gnueabi\4.8.1" --verbose -o "TestOeSdk"  ./src/TestOeSdk.o   
Using built-in specs.
COLLECT_GCC=arm-oe-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/lto-wrapper.exe
Target: arm-oe-linux-gnueabi
Configured with: /home/fgretief/u/core-oe/tmp-eglibc/work-shared/gcc-4.8.1-r0/gcc-4.8.1/configure --build=x86_64-linux --host=x86_64-oesdk-mingw32 --target=arm-oe-linux-gnueabi --prefix=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr --exec_prefix=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr --bindir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi --sbindir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi --libexecdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/libexec/armv5te-oe-linux-gnueabi --datadir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/share --sysconfdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/etc --sharedstatedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/com --localstatedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/var --libdir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/lib/armv5te-oe-linux-gnueabi --includedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/include --oldincludedir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/include --infodir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/share/info --mandir=/usr/local/oecore-x86_64/sysroots/x86_64-oesdk-mingw32/usr/share/man --disable-silent-rules --disable-dependency-tracking --with-libtool-sysroot=/home/fgretief/u/core-oe/tmp-eglibc/sysroots/x86_64-nativesdk-oesdk-mingw32 --with-gnu-ld --enable-shared --enable-languages=c,c++ --enable-threads=posix --enable-multilib --enable-c99 --enable-long-long --enable-symvers=gnu --enable-libstdcxx-pch --program-prefix=arm-oe-linux-gnueabi- --without-local-prefix --enable-target-optspace --enable-lto --enable-libssp --disable-bootstrap --disable-libmudflap --with-system-zlib --with-linker-hash-style=gnu --enable-linker-build-id --with-ppl=no --with-cloog=no --enable-checking=release --enable-cheaders=c_global --with-float=soft --with-gxx-include-dir=/usr/local/oecore-x86_64/sysroots/armv5te-oe-linux-gnueabi/usr/include/c++ --with-build-time-tools=/home/fgretief/u/core-oe/tmp-eglibc/sysroots/x86_64-linux/usr/arm-oe-linux-gnueabi/bin --with-sysroot=/usr/local/oecore-x86_64/sysroots/armv5te-oe-linux-gnueabi --with-build-sysroot=/home/fgretief/u/core-oe/tmp-eglibc/sysroots/qemuarm --disable-libunwind-exceptions --disable-libssp --disable-libgomp --disable-libmudflap --with-mpfr=/home/fgretief/u/core-oe/tmp-eglibc/sysroots/x86_64-nativesdk-oesdk-mingw32 --with-mpc=/home/fgretief/u/core-oe/tmp-eglibc/sysroots/x86_64-nativesdk-oesdk-mingw32 --enable-nls --disable-nls
Thread model: posix
gcc version 4.8.1 (GCC) 
COMPILER_PATH=f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/;f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/
LIBRARY_PATH=f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../lib/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/;f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../lib/armv5te-oe-linux-gnueabi/gcc/
COLLECT_GCC_OPTIONS='-LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib' '-LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\lib' '-LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib\arm-oe-linux-gnueabi\4.8.1' '-v' '-o' 'TestOeSdk' '-mfloat-abi=soft' '-mtls-dialect=gnu'
 f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/collect2.exe --sysroot=/usr/local/oecore-x86_64/sysroots/armv5te-oe-linux-gnueabi --build-id --eh-frame-hdr --hash-style=gnu -dynamic-linker /lib/ld-linux.so.3 -X -m armelf_linux_eabi -o TestOeSdk crt1.o crti.o crtbegin.o -LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib -LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\lib -LF:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr\lib\arm-oe-linux-gnueabi\4.8.1 -Lf:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../lib/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1 -Lf:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../lib/armv5te-oe-linux-gnueabi/gcc ./src/TestOeSdk.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed crtend.o crtn.o
f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/ld.exe: cannot find crt1.o: No such file or directory
f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/ld.exe: cannot find crti.o: No such file or directory
f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr/bin/armv5te-oe-linux-gnueabi/../../libexec/armv5te-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.8.1/ld.exe: cannot find crtbegin.o: No such file or directory
collect2.exe: error: ld returned 1 exit status
make: *** [TestOeSdk] Error 1
make: Leaving directory `F:/workspace_4.3/TestOeSdk/Debug'

Found a fix. There were 3 things that need to be done.

1. Need to add a symlink to target directory. Under Windows this can be done with mklink tool:

cd f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr
mklink /D arm-oe-linux-gnueabi F:\Programs\oecore-x86_64-armv5te-toolchain-oe-core.0\sysroots\armv5te-oe-linux-gnueabi\usr

2. The sysroot is wrong and must be set explicitly for the linker.

--sysroot=f:/Programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/armv5te-oe-linux-gnueabi

3. Lastly, there must be a search path in the linker to be able to find some system files

-Lf:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/armv5te-oe-linux-gnueabi/usr/lib

When these 3 changes is in, the process compiles through and executes on ARM hardware.

root@beaglebone:~# ./TestOeSdk
Hello World

There was a problem with fix 1) above. It should point to the armv5 sysroot and not to its /usr directory.

cd f:/programs/oecore-x86_64-armv5te-toolchain-oe-core.0/sysroots/x86_64-oesdk-mingw32/usr
mklink /D arm-oe-linux-gnueabi ....\armv5te-oe-linux-gnueabi

Also, we fixed the sysroot in the gcc-cross-canadian_4.8.bbappend recipe by changing the --with-sysroot argument in EXTRA_OECONF_PATHS variable from

${SDKPATH}/sysroots/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}
to
${exec_prefix}/../../${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}

The ${exec_prefix} path will be replaced by GCC with its executing path to make the sysroot relative to the install path, thus negating the need to pass --sysroot during compiles and thus eliminating fix 2.

Fix 3) was also eliminated by the correct path in fix 1) and sysroot in 2).