http://llvm.org/bugs/show_bug.cgi?id=20668
Bug ID: 20668
Summary: cmake build of compiler-rt on Mac fails when LDFLAGS
are set
Product: compiler-rt
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: compiler-rt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
We're trying to switch to using CMake for Chromium's Clang build. We do
bootstrap builds: first we build clang and libc++, then we use those to build
Clang again.
Steps to reproduce:
$ LDFLAGS="-L/work/llvm/build.release/lib" cmake -GNinja
-DCMAKE_BUILD_TYPE=Release
-DCMAKE_C_COMPILER=/work/llvm/build.release/bin/clang
-DCMAKE_CXX_COMPILER=/work/llvm/build.release/bin/clang++
-DCMAKE_CXX_FLAGS="-stdlib=libc++ -nostdinc++
-I/work/llvm/projects/libcxx/include" $LLVM_SRC_DIR
$ ninja
...
ld: building for iOS Simulator, but linking against dylib built for MacOSX file
'/work/llvm/build.release/lib/libc++.dylib' for architecture x86_64
The problem is that our LDFLAGS end up in the link lines also for the
cross-compiled runtimes, e.g. for iossim or i386.
We'll work around this by building compiler-rt in a separate tree and not
setting LDFLAGS, but it's not ideal.
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