I have recently tried porting a project to CMake but I am facing a few issues
when cross-compiling
The project can be compiled with a varying set of compilers (already works with
our custom makefiles) and currently the only option seems to be passing this
information along with the cmake command. This fails with different errors when
executed from within the cygwin shell or the windows command prompt.
I am doing a simple test with just two files.
main.c:
main()
{
}
CMakeLists.txt:
PROJECT(test)
ADD_EXECUTABLE(test main.c)
In the cygwin shell I get;
$ cmake -DCMAKE_C_COMPILER=avr-gcc -DCMAKE_CXX_COMPILER=avr-g++ -G "Unix Makefi
les" .
-- Check for working C compiler: avr-gcc
-- Check for working C compiler: avr-gcc -- broken
CMake Error: The C compiler "avr-gcc" is not able to compile a simple test progr
am.
It fails with the following output:
make: Warning: File `CMakeFiles/progress.make' has modification time 0.24 s in
the future
/usr/bin/make -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryComp
ileExec.dir/build
make[1]: Entering directory `/cygdrive/e/temp/cmake_test/CMakeFiles/CMakeTmp'
make[1]: Warning: File `CMakeFiles/cmTryCompileExec.dir/flags.make' has modifica
tion time 0.19 s in the future
c:/Program\ Files/CMake\ 2.4/bin/cmake.exe -E cmake_progress_report e:/temp/cmak
e_test/CMakeFiles/CMakeTmp/CMakeFiles 1
←[32mBuilding C object CMakeFiles/cmTryCompileExec.dir/testCCompiler.obj
←[0mc:/WinAVR/bin/avr-gcc.exe -o CMakeFiles/cmTryCompileExec.dir/testCCompiler
.obj -c e:/temp/cmake_test/CMakeFiles/CMakeTmp/testCCompiler.c
←[31m←[1mLinking C executable cmTryCompileExec.exe
←[0mc:/Program\ Files/CMake\ 2.4/bin/cmake.exe -P CMakeFiles/cmTryCompileExec.di
r/cmake_clean_target.cmake
c:/WinAVR/bin/avr-gcc.exe "CMakeFiles/cmTryCompileExec.dir/testCCompiler
.obj" -o cmTryCompileExec.exe -Wl,--major-image-version,0,--minor-image-versio
n,0
c:\winavr\bin\..\lib\gcc\avr\4.1.1\..\..\..\..\avr\bin\ld.exe: unrecognized opti
on '--major-image-version'
c:\winavr\bin\..\lib\gcc\avr\4.1.1\..\..\..\..\avr\bin\ld.exe: use the --help op
tion for usage information
make[1]: *** [cmTryCompileExec.exe] Error 1
make[1]: Leaving directory `/cygdrive/e/temp/cmake_test/CMakeFiles/CMakeTmp'
make: *** [cmTryCompileExec/fast] Error 2
CMake will not be able to correctly generate this project.
-- Configuring done
Then I delete all the other files generated by cmake, open 'cmd' and here is
get;
E:\temp\cmake_test>cmake -DCMAKE_C_COMPILER=avr-gcc -DCMAKE_CXX_COMPILER=avr-g++
-G "Unix Makefiles" .
-- Check for working C compiler: avr-gcc
-- Check for working C compiler: avr-gcc -- broken
CMake Error: The C compiler "avr-gcc" is not able to compile a simple test progr
am.
It fails with the following output:
C:/WinAVR/utils/bin/make.exe -f CMakeFiles/cmTryCompileExec.dir/build.make CMak
eFiles/cmTryCompileExec.dir/build
make.exe[1]: Entering directory `E:/temp/cmake_test/CMakeFiles/CMakeTmp'
C:/Program\ Files/CMake\ 2.4/bin/cmake.exe -E cmake_progress_report E:/temp/cmak
e_test/CMakeFiles/CMakeTmp/CMakeFiles 1
/usr/bin/sh: -c: line 3: syntax error: unexpected end of file
make.exe[1]: *** [CMakeFiles/cmTryCompileExec.dir/testCCompiler.obj] Error 258
make.exe[1]: Leaving directory `E:/temp/cmake_test/CMakeFiles/CMakeTmp'
make.exe: *** [cmTryCompileExec/fast] Error 2
CMake will not be able to correctly generate this project.
-- Configuring done
I have also tried to do the same thing on a Linux box where it works as
expected. Cmake passes when I do not issue '-G "Unix Makefiles"' but then the
compiler used is cl and not the intended avr-gcc. For various reasons, I cannot
use the Linux box for the build.
What is the solution to this?
Warm regards,
Kishore
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