[libcxx-commits] [PATCH] D130586: [cmake] Use `CMAKE_INSTALL_LIBDIR` too

[Nathan Chancellor via Phabricator via libcxx-commits]

nathanchance added a comment.

I can no longer do a two stage build on Fedora after this change.

  $ cmake \
  -B build/stage1 \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_C_COMPILER=$(command -v clang) \
  -DCMAKE_CXX_COMPILER=$(command -v clang++) \
  -DLLVM_ENABLE_PROJECTS="clang;lld" \
  -DLLVM_ENABLE_TERMINFO=OFF \
  -DLLVM_TARGETS_TO_BUILD=host \
  -DLLVM_USE_LINKER=$(command -v ld.lld) \
  -G Ninja \
  -S llvm
  ...
  
  $ ninja -C build/stage1
  ...
  
  $ cmake \
  -B build/stage2 \
  -DCLANG_TABLEGEN=$PWD/build/stage1/bin/clang-tblgen \
  -DCMAKE_AR=$PWD/build/stage1/bin/llvm-ar \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_C_COMPILER=$PWD/build/stage1/bin/clang \
  -DCMAKE_CXX_COMPILER=$PWD/build/stage1/bin/clang++ \
  -DCMAKE_RANLIB=$PWD/build/stage1/bin/llvm-ranlib \
  -DLLVM_ENABLE_PROJECTS="clang;lld" \
  -DLLVM_ENABLE_TERMINFO=OFF \
  -DLLVM_TABLEGEN=$PWD/build/stage1/bin/llvm-tblgen \
  -DLLVM_TARGETS_TO_BUILD=host \
  -DLLVM_USE_LINKER=$PWD/build/stage1/bin/ld.lld \
  -G Ninja \
  -S llvm
  ...
  -- Performing Test LLVM_LIBSTDCXX_MIN
  -- Performing Test LLVM_LIBSTDCXX_MIN - Failed
  CMake Error at cmake/modules/CheckCompilerVersion.cmake:88 (message):
    libstdc++ version must be at least 7.1.
  Call Stack (most recent call first):
    cmake/config-ix.cmake:15 (include)
    CMakeLists.txt:810 (include)
  ...
  
  $ cat build/stage2/CMakeFiles/CMakeError.log
  Checking whether the ASM compiler is GNU using "--version" did not match "(GNU assembler)|(GCC)|(Free Software Foundation)":
  clang version 16.0.0 (https://github.com/llvm/llvm-project f7a33090a91015836497c75f173775392ab0304d)
  Target: x86_64-unknown-linux-gnu
  Thread model: posix
  InstalledDir: /home/nathan/cbl/src/llvm-project/build/stage1/bin
  Performing C++ SOURCE FILE Test LLVM_LIBSTDCXX_MIN failed with the following output:
  Change Dir: /home/nathan/cbl/src/llvm-project/build/stage2/CMakeFiles/CMakeTmp
  
  Run Build Command(s):/usr/bin/ninja-build cmTC_caa1d && [1/2] Building CXX object CMakeFiles/cmTC_caa1d.dir/src.cxx.o
  FAILED: CMakeFiles/cmTC_caa1d.dir/src.cxx.o
  /home/nathan/cbl/src/llvm-project/build/stage1/bin/clang++ -DLLVM_LIBSTDCXX_MIN  -std=c++0x -std=c++17 -MD -MT CMakeFiles/cmTC_caa1d.dir/src.cxx.o -MF CMakeFiles/cmTC_caa1d.dir/src.cxx.o.d -o CMakeFiles/cmTC_caa1d.dir/src.cxx.o -c /home/nathan/cbl/src/llvm-project/build/stage2/CMakeFiles/CMakeTmp/src.cxx
  In file included from /home/nathan/cbl/src/llvm-project/build/stage2/CMakeFiles/CMakeTmp/src.cxx:2:
  In file included from /usr/lib/gcc/x86_64-redhat-linux/12/../../../../include/c++/12/iosfwd:40:
  In file included from /usr/lib/gcc/x86_64-redhat-linux/12/../../../../include/c++/12/bits/postypes.h:40:
  In file included from /usr/lib/gcc/x86_64-redhat-linux/12/../../../../include/c++/12/cwchar:44:
  /usr/include/wchar.h:35:10: fatal error: 'stddef.h' file not found
  #include <stddef.h>
           ^~~~~~~~~~
  1 error generated.
  ninja: build stopped: subcommand failed.
  
  
  Source file was:
  
  #include <iosfwd>
  #if defined(__GLIBCXX__)
  #if !defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE < 7
  #error Unsupported libstdc++ version
  #endif
  #endif
  int main() { return 0; }
  
  $ fd stddef.h build/stage1
  build/stage1/lib/clang/16.0.0/include/stddef.h

The parent commit is fine. If there is any further information I can provide or patches I can test, please let me know!


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D130586/new/

https://reviews.llvm.org/D130586