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fix(llvm.org): ship libc++/libc++abi/libunwind on linux #13771

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fix(llvm.org): ship libc++/libc++abi/libunwind on linux #13771

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11 changes: 11 additions & 0 deletions projects/llvm.org/package.yml
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Expand Up @@ -40,9 +40,20 @@ build:
script:
# Building compiler-rt on darwin+aarch64 fails for versions less than
# 14 with the below configuration. FIXME if possible, of course.
#
# On linux we ALSO build libc++/libc++abi/libunwind as runtimes so the
# bottle ships a usable libc++ (headers under include/c++/v1 + the
# shared libs). Without it, clang has no libc++ at all on linux — only
# gcc's libstdc++ (which stays the default via CLANG_DEFAULT_CXX_STDLIB
# below) — so anything requiring `-stdlib=libc++` (e.g. envoyproxy.io,
# which dropped gcc/libstdc++ support in 1.21+) fails with
# "'iostream'/'string' file not found". This is additive: libstdc++
# remains the default; libc++ is now available on request. Darwin gets
# libc++ from the SDK, so we only add these on linux.
- run: |
RUNTIMES="-DLLVM_ENABLE_RUNTIMES='compiler-rt'"
if test "{{hw.platform}}" = "linux"; then
RUNTIMES="-DLLVM_ENABLE_RUNTIMES='compiler-rt;libcxx;libcxxabi;libunwind'"
ARGS="$ARGS $RUNTIMES"
elif semverator satisfies '>=14' {{version}}; then
ARGS="$ARGS $RUNTIMES"
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