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[英]macos - how to tell cabal/ghc to look in /opt for libraries/include files?
[英]Converting *.hs to llvm ir (*.ll) -— Error: ghc: could not execute: opt — on macOS Sierra
ghc -fllvm -keep-llvm-files -fforce-recomp hello.hs
[1 of 1]编译Main(hello.hs,hello.o)
:警告:无法确定LLVM版本! 确保已安装LLVM ghc:无法执行:opt
虽然.ll文件是在当前目录中生成的,但是我仍然没有收到该错误。
需要设置PATH,CPLUS_INCLUDE_PATH和LD_LIBRARY_PATH
# export PATH=/usr/local/opt/llvm/bin:$PATH
# export CPLUS_INCLUDE_PATH=$(llvm-config --includedir):$CPLUS_INCLUDE_PATH
# export LD_LIBRARY_PATH=$(llvm-config --libdir):$LD_LIBRARY_PATH
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