068ea1beb4
Apparently clang is smart enough to look up runtime files missing from the sysroot in the installation directory automatically.
44 lines
2.4 KiB
Bash
Executable file
44 lines
2.4 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -uo pipefail
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# run from root build directory (from inside nix-shell or otherwise defining GLIBC/ZLIB/GMP) as in
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# ```
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# eval cmake ../.. $(../../script/prepare-llvm-linux.sh ~/Downloads/lean-llvm-x86_64-linux-gnu.tar.zst)
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# ```
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# use full LLVM release for compiling C++ code, but subset for compiling C code and distribution
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[[ -d llvm ]] || (mkdir llvm; tar xf $1 --strip-components 1 --directory llvm)
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mkdir -p stage1/{bin,lib,lib/glibc,include/clang}
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CP="cp -d" # preserve symlinks
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# a C compiler!
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cp -L llvm/bin/clang stage1/bin/
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# a linker!
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cp -L llvm/bin/ld.lld stage1/bin/
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# a static archiver!
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cp -L llvm/bin/llvm-ar stage1/bin/
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# dependencies of the above
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$CP llvm/lib/lib{clang-cpp,LLVM}*.so* stage1/lib/
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$CP $ZLIB/lib/libz.so* stage1/lib/
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find stage1 -type f -exec strip --strip-unneeded '{}' \; 2> /dev/null
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# lean.h dependencies
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$CP llvm/lib/clang/*/include/{std*,__std*,limits}.h stage1/include/clang
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# ELF dependencies, must be put there for `--sysroot`
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$CP $GLIBC/lib/crt* llvm/lib/
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$CP $GLIBC/lib/crt* stage1/lib/
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# runtime
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(cd llvm; $CP --parents lib/clang/*/lib/*/{clang_rt.*.o,libclang_rt.builtins*} ../stage1)
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$CP llvm/lib/lib{c++,c++abi,unwind}.* $GMP/lib/libgmp.a stage1/lib/
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# glibc: use for linking (so Lean programs don't embed newer symbol versions), but not for running (because libc.so, librt.so, and ld.so must be compatible)!
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$CP $GLIBC/lib/libc_nonshared.a stage1/lib/glibc
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for f in $GLIBC/lib/lib{c,dl,m,rt,pthread}-*; do b=$(basename $f); cp $f stage1/lib/glibc/${b%-*}.so; done
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OPTIONS=()
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echo -n " -DLEAN_STANDALONE=ON"
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echo -n " -DCMAKE_C_COMPILER=$PWD/stage1/bin/clang -DCMAKE_CXX_COMPILER=$PWD/llvm/bin/clang++ -DLEAN_CXX_STDLIB='-Wl,-Bstatic -lc++ -lc++abi -Wl,-Bdynamic'"
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# allow C++ code to include /usr since it needs quite a few more headers
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# set sysroot for both C++ and C to make sure we have all necessary runtime files, but don't embed in `leanc` so users can still link to system libs
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echo -n " -DLEAN_EXTRA_CXX_FLAGS='--sysroot $PWD/llvm -I/usr/include -I/usr/include/x86_64-linux-gnu'"
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echo -n " -DLEANC_INTERNAL_FLAGS='-I ROOT/include/clang' -DLEANC_OPTS='--sysroot $PWD/stage1' -DLEANC_CC=ROOT/bin/clang"
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echo -n " -DLEANC_INTERNAL_LINKER_FLAGS='-L ROOT/lib -L ROOT/lib/glibc ROOT/lib/glibc/libc_nonshared.a -Wl,--as-needed -static-libgcc -Wl,-Bstatic -lgmp -lunwind -Wl,-Bdynamic -fuse-ld=lld'"
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# do not set `LEAN_CC` for tests
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echo -n " -DLEAN_TEST_VARS=''"
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