depends: libevent build fails when C{C,XX} are provided #30439

1. 
   hebasto commented at 12:51 pm on July 12, 2024: member

    0$ make -C depends libevent HOST=x86_64-apple-darwin CC=clang CXX=clang++
    1make: Entering directory '/home/hebasto/git/bitcoin/depends'
    2Configuring libevent...
    3-- The C compiler identification is Clang 16.0.6
    4-- Detecting C compiler ABI info
    5-- Detecting C compiler ABI info - failed
    6-- Check for working C compiler: /usr/bin/clang-16
    7-- Check for working C compiler: /usr/bin/clang-16 - broken
    8CMake Error at /usr/share/cmake-3.27/Modules/CMakeTestCCompiler.cmake:67 (message):
    9  The C compiler
   10
   11    "/usr/bin/clang-16"
   12
   13  is not able to compile a simple test program.
   14
   15  It fails with the following output:
   16
   17    Change Dir: '/home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb'
   18    
   19    Run Build Command(s): /usr/bin/cmake -E env VERBOSE=1 /usr/bin/gmake -f Makefile cmTC_8ee7e/fast
   20    gmake[1]: Entering directory '/home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb'
   21    /usr/bin/gmake  -f CMakeFiles/cmTC_8ee7e.dir/build.make CMakeFiles/cmTC_8ee7e.dir/build
   22    gmake[2]: Entering directory '/home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb'
   23    Building C object CMakeFiles/cmTC_8ee7e.dir/testCCompiler.c.o
   24    /usr/bin/clang-16 --target=x86_64-apple-darwin   -I/home/hebasto/git/bitcoin/depends/x86_64-apple-darwin/include -D_FORTIFY_SOURCE=3 -pipe -std=c11 -mmacos-version-min=11.0 -mlinker-version=711 -O2  -fPIE -MD -MT CMakeFiles/cmTC_8ee7e.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_8ee7e.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_8ee7e.dir/testCCompiler.c.o -c /home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb/testCCompiler.c
   25    Linking C executable cmTC_8ee7e
   26    /usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_8ee7e.dir/link.txt --verbose=1
   27    /usr/bin/clang-16 --target=x86_64-apple-darwin -I/home/hebasto/git/bitcoin/depends/x86_64-apple-darwin/include -D_FORTIFY_SOURCE=3 -pipe -std=c11 -mmacos-version-min=11.0 -mlinker-version=711 -O2  -Wl,-headerpad_max_install_names -Wl,-platform_version,macos,11.0,14.0 -Wl,-no_adhoc_codesign -fuse-ld=lld  -L/home/hebasto/git/bitcoin/depends/x86_64-apple-darwin/lib  CMakeFiles/cmTC_8ee7e.dir/testCCompiler.c.o -o cmTC_8ee7e 
   28    ld64.lld: error: library not found for -lSystem
   29    clang: error: linker command failed with exit code 1 (use -v to see invocation)
   30    gmake[2]: *** [CMakeFiles/cmTC_8ee7e.dir/build.make:100: cmTC_8ee7e] Error 1
   31    gmake[2]: Leaving directory '/home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb'
   32    gmake[1]: *** [Makefile:127: cmTC_8ee7e/fast] Error 2
   33    gmake[1]: Leaving directory '/home/hebasto/git/bitcoin/depends/work/build/x86_64-apple-darwin/libevent/2.1.12-stable-a0bf1cb6f39/build/CMakeFiles/CMakeScratch/TryCompile-Y4dUBb'
   34    
   35    
   36
   37  
   38
   39  CMake will not be able to correctly generate this project.
   40Call Stack (most recent call first):
   41  CMakeLists.txt:47 (project)
   42
   43
   44-- Configuring incomplete, errors occurred!
   45make: *** [funcs.mk:302: /home/hebasto/git/bitcoin/depends/x86_64-apple-darwin/.libevent_stamp_configured] Error 1
   46make: Leaving directory '/home/hebasto/git/bitcoin/depends'
   

2. hebasto added the label Build system on Jul 12, 2024
3. 
   fanquake commented at 12:53 pm on July 12, 2024: member

   Overriding those variables when cross-compiling for macOS isn’t currently supported.
4. 
   fanquake commented at 12:55 pm on July 12, 2024: member

   IIRC we also settled on the minimum clang for macOS being 18, so the Clang you’re using (16), is likely too old.
5. 
   fanquake commented at 12:56 pm on July 12, 2024: member

   Note that this is also not libevent specific. It’s just that it happens to be the first thing compiled in depends.
6. hebasto closed this on Jul 12, 2024

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hebasto fanquake

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