src/ci/docker/host-x86_64/dist-x86_64-linux/build-clang.sh

   1 #!/usr/bin/env bash
   2
   3 set -ex
   4
   5 source shared.sh
   6
   7 LLVM=llvmorg-9.0.0
   8
   9 mkdir llvm-project
  10 cd llvm-project
  11
  12 curl -L https://github.com/llvm/llvm-project/archive/$LLVM.tar.gz | \
  13   tar xzf - --strip-components=1
  14
  15 yum install -y patch
  16 patch -Np1 < ../llvm-project-centos.patch
  17
  18 mkdir clang-build
  19 cd clang-build
  20
  21 # For whatever reason the default set of include paths for clang is different
  22 # than that of gcc. As a result we need to manually include our sysroot's
  23 # include path, /rustroot/include, to clang's default include path.
  24 #
  25 # Alsow there's this weird oddity with gcc where there's an 'include-fixed'
  26 # directory that it generates. It turns out [1] that Centos 5's headers are so
  27 # old that they're incompatible with modern C semantics. While gcc automatically
  28 # fixes that clang doesn't account for this. Tell clang to manually include the
  29 # fixed headers so we can successfully compile code later on.
  30 #
  31 # [1]: https://sourceware.org/ml/crossgcc/2008-11/msg00028.html
  32 INC="/rustroot/include"
  33 INC="$INC:/rustroot/lib/gcc/x86_64-unknown-linux-gnu/5.5.0/include-fixed"
  34 INC="$INC:/usr/include"
  35
  36 hide_output \
  37     cmake ../llvm \
  38       -DCMAKE_C_COMPILER=/rustroot/bin/gcc \
  39       -DCMAKE_CXX_COMPILER=/rustroot/bin/g++ \
  40       -DCMAKE_BUILD_TYPE=Release \
  41       -DCMAKE_INSTALL_PREFIX=/rustroot \
  42       -DLLVM_TARGETS_TO_BUILD=X86 \
  43       -DLLVM_ENABLE_PROJECTS="clang;lld" \
  44       -DC_INCLUDE_DIRS="$INC"
  45
  46 hide_output make -j10
  47 hide_output make install
  48
  49 cd ../..
  50 rm -rf llvm-project