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put the previous commit behind cmake option ZIG_PREFER_CLANG_CPP_DYLIB

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Without this, building from source caused:

CommandLine Error: Option 'mc-relax-all' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options

This is due to LLVM static libs compiled in multiple times. But without
the LLVM static libs on the linker line, it caused undefined symbol
linker errors.

So our hands are tied. Homebrew users will have to specify
`-DZIG_PREFER_CLANG_CPP_DYLIB`.
This commit is contained in:
Andrew Kelley
2020-04-10 01:25:15 -04:00
parent aaf99371b2
commit e857190dab
2 changed files with 2 additions and 1 deletions
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2
cmake/Findclang.cmake
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@@ -17,7 +17,7 @@ find_path(CLANG_INCLUDE_DIRS NAMES clang/Frontend/ASTUnit.h
/mingw64/include
)
if(NOT ZIG_STATIC_LLVM)
if(ZIG_PREFER_CLANG_CPP_DYLIB)
find_library(CLANG_CPP_DYLIB
NAMES
clang-cpp-10.0