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