Bug 311694 – [WPE][cross-toolchain-helper] determineArchitecture() in webkitdirs.pm doesn't handle correctly the cross-toolchain-helper case.

• Component: WPE WebKit
• Status: RESOLVED FIXED

[Carlos Alberto Lopez Perez]

I observed this when cross-building  WPE with CXXFLAGS="-g0 -O2 -DNDEBUG -Wno-cast-align -mrestrict-it -mthumb"

$ Tools/Scripts/build-webkit --wpe --cross-target=rpi3-32bits-userland
CMake Error at /usr/share/cmake-3.25/Modules/CMakeTestCCompiler.cmake:70 (message):
  The C compiler

    "/usr/bin/cc"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/clopez/webkit/WPEWebKit/__cmake_systeminformation/CMakeFiles/CMakeScratch/TryCompile-lIHCwp
    
    Run Build Command(s):/usr/bin/gmake -f Makefile cmTC_4fcdc/fast && /usr/bin/gmake  -f CMakeFiles/cmTC_4fcdc.dir/build.make CMakeFiles/cmTC_4fcdc.dir/build
    gmake[1]: Entering directory '/home/clopez/webkit/WPEWebKit/__cmake_systeminformation/CMakeFiles/CMakeScratch/TryCompile-lIHCwp'
    Building C object CMakeFiles/cmTC_4fcdc.dir/testCCompiler.c.o
    /usr/bin/cc   -g0 -O2 -DNDEBUG -Wno-cast-align -mrestrict-it -mthumb  -o CMakeFiles/cmTC_4fcdc.dir/testCCompiler.c.o -c /home/clopez/webkit/WPEWebKit/__cmake_systeminformation/CMakeFiles
/CMakeScratch/TryCompile-lIHCwp/testCCompiler.c
    cc: error: unrecognized command-line option ‘-mrestrict-it’; did you mean ‘-Wrestrict’?
    cc: error: unrecognized command-line option ‘-mthumb’
    gmake[1]: *** [CMakeFiles/cmTC_4fcdc.dir/build.make:78: CMakeFiles/cmTC_4fcdc.dir/testCCompiler.c.o] Error 1
    gmake[1]: Leaving directory '/home/clopez/webkit/WPEWebKit/__cmake_systeminformation/CMakeFiles/CMakeScratch/TryCompile-lIHCwp'
    gmake: *** [Makefile:127: cmTC_4fcdc/fast] Error 2
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:6 (project)



Error: --system-information failed on internal CMake!
cross-toolchain-helper INFO: Adding defined environment for rpi3-32bits-userland: 
cross-toolchain-helper INFO: export BUILD_WEBKIT_ARGS="--no-fatal-warnings"
cross-toolchain-helper INFO: Toolchain already built at: /home/clopez/webkit/WPEWebKit/WebKitBuild/CrossToolChains/rpi3-32bits-userland/build/toolchain
cross-toolchain-helper INFO: Running inside cross-toolchain env: /home/clopez/webkit/WPEWebKit/Tools/Scripts/build-webkit --release --wpe 
+  cmake -DPORT="WPE" -DCMAKE_BUILD_TYPE=Release -G Ninja -DDEVELOPER_MODE=ON -DENABLE_EXPERIMENTAL_FEATURES=ON -DBWRAP_EXECUTABLE=/usr/bin/bwrap -DDBUS_PROXY_EXECUTABLE=/usr/bin/xdg-dbus-proxy "/home/clopez/webkit/WPEWebKit"
-- The C compiler identification is GNU 13.3.0
-- The CXX compiler identification is GNU 13.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /home/clopez/webkit/WPEWebKit/WebKitBuild/CrossToolChains/rpi3-32bits-userland/build/toolchain/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/a
rm-poky-linux-gnueabi-gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /home/clopez/webkit/WPEWebKit/WebKitBuild/CrossToolChains/rpi3-32bits-userland/build/toolchain/sysroots/x86_64-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi
/arm-poky-linux-gnueabi-g++ - skipped
-- Detecting CXX compile features



[...]

So what happens is that build-webkit is calling cmake --system-information outside of the cross-toolchain environment at determineArchitecture()

[Carlos Alberto Lopez Perez]

Pull request: https://github.com/WebKit/WebKit/pull/62240

[EWS]

Committed 311591@main (68c43f3fd9ec): <https://commits.webkit.org/311591@main>

Reviewed commits have been landed. Closing PR #62240 and removing active labels.