Add a LLVM_USE_LINKER that defines the linker to use when building LLVM
Summary:
This string parameter is passed to -fuse-ld when linking. It can be
an absolute path to your custom linker, otherwise clang will look for
`ld.{name}`.
Reviewers: davide, tejohnson, pcc
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28738
llvm-svn: 292047
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 1825b55..22ec8b5 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -147,9 +147,19 @@
endif()
endfunction()
-if(LLVM_ENABLE_LLD)
- check_cxx_compiler_flag("-fuse-ld=lld" CXX_SUPPORTS_LLD)
- append_if(CXX_SUPPORTS_LLD "-fuse-ld=lld"
+if( LLVM_ENABLE_LLD )
+ if ( LLVM_USE_LINKER )
+ message(FATAL_ERROR "LLVM_ENABLE_LLD and LLVM_USE_LINKER can't be set at the same time")
+ endif()
+ set(LLVM_USE_LINKER "lld")
+endif()
+
+if( LLVM_USE_LINKER )
+ check_cxx_compiler_flag("-fuse-ld=${LLVM_USE_LINKER}" CXX_SUPPORTS_CUSTOM_LINKER)
+ if ( NOT CXX_SUPPORTS_CUSTOM_LINKER )
+ message(FATAL_ERROR "Host compiler does not support '-fuse-ld=${LLVM_USE_LINKER}'")
+ endif()
+ append("-fuse-ld=${LLVM_USE_LINKER}"
CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS)
endif()