12 curl -L https://github.com/llvm/llvm-project/archive/$LLVM.tar.gz | \
13 tar xzf - --strip-components=1
16 patch -Np1 < ../llvm-project-centos.patch
21 # For whatever reason the default set of include paths for clang is different
22 # than that of gcc. As a result we need to manually include our sysroot's
23 # include path, /rustroot/include, to clang's default include path.
25 # Alsow there's this weird oddity with gcc where there's an 'include-fixed'
26 # directory that it generates. It turns out [1] that Centos 5's headers are so
27 # old that they're incompatible with modern C semantics. While gcc automatically
28 # fixes that clang doesn't account for this. Tell clang to manually include the
29 # fixed headers so we can successfully compile code later on.
31 # [1]: https://sourceware.org/ml/crossgcc/2008-11/msg00028.html
32 INC="/rustroot/include"
33 INC="$INC:/rustroot/lib/gcc/x86_64-unknown-linux-gnu/5.5.0/include-fixed"
34 INC="$INC:/usr/include"
38 -DCMAKE_C_COMPILER=/rustroot/bin/gcc \
39 -DCMAKE_CXX_COMPILER=/rustroot/bin/g++ \
40 -DCMAKE_BUILD_TYPE=Release \
41 -DCMAKE_INSTALL_PREFIX=/rustroot \
42 -DLLVM_TARGETS_TO_BUILD=X86 \
43 -DLLVM_ENABLE_PROJECTS="clang;lld" \
44 -DC_INCLUDE_DIRS="$INC"
47 hide_output make install