RSB failed during canadian cross building

[hguerard]

I am on a Linux Ubuntu build host with the MinGW packages installed (mingw-w64). The command line used is:

./source-builder/sb-set-builder --prefix=/home/vagrant/rtems-toolchain/output --with-rtems-bsp=xilinx_zynq_a9_qemu --host=i686-w64-mingw32 6/rtems-arm

During the build process, I have the following error:

make: Entering directory '/home/vagrant/rtems-toolchain/rsb/build/arm-rtems6-gcc-efc21f1-newlib-9ae9eef-i686-w64-mingw32-1/build-cxc'
make[1]: Entering directory '/home/vagrant/rtems-toolchain/rsb/build/arm-rtems6-gcc-efc21f1-newlib-9ae9eef-i686-w64-mingw32-1/build-cxc'
mkdir -p -- ./libiberty
mkdir -p -- ./fixincludes
mkdir -p -- ./intl
mkdir -p -- ./mpfr
Configuring in ./libiberty
Configuring in ./fixincludes
Configuring in ./intl
Configuring in ./mpfr
configure: creating cache ./config.cache
checking for i686-w64-mingw32-gcc... i686-w64-mingw32-gcc
...
...
configure: error: gmp.h can't be found, or is unusable.
...
make[1]: *** [configure-mpfr] Error 1

Can you help me to resolve this issue?

Thanks,
Hubert

[Frank Kuehndel]

Hello Hubert,

I have no knowledge about MinGW. Without the --host=i686-w64-mingw32 I would expect the sb-set-builder to build the tools because it builds the gmp itself during this process.

The error above indicates that - for whatever reason - the gmp package cannot be found. The most pragmatic solution is to install it on the host. The package you need is usually called gmp-devel or libgmp-devel. Yet, in this case the gmp-library needs also be available on the machine on which the tools (esp. gdb) are used.

Greetings
Frank

[hguerard]

Hi Frank,

I have pin-point the commit which breaks the canadian cross-compilation. It is ​this one.

Looking at the commit diff, GMP is removed from the preparation of the compilation of GCC without telling GCC where the staged files for GMP are.

Hope this helps,
Hubert

[Frank Kuehndel]

Thanks Hubert!

Since the patch you found as cause of this problem is from Chris Johns, I will assign this ticked to him. Maybe he has an idea how to fix this issues and can help you.

Greetings
Frank