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[llvm-shlib] Fix cross-compilation for LLVM-C

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When we're cross-compiling, build and use a native llvm-nm instead of
attempting to use the one from the target's build tree.

A nice follow-up would be to add a cache variable to allow specifying a
path to an external native llvm-nm instead of building one ourselves,
similar to LLVM_TABLEGEN and LLVM_CONFIG_PATH.

Differential Revision: https://reviews.llvm.org/D60025

llvm-svn: 357487
This commit is contained in:
Shoaib Meenai 2019-04-02 15:58:05 +00:00
parent ed8d685665
commit 16077c1bdc
1 changed files with 10 additions and 2 deletions
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12
tools/llvm-shlib/CMakeLists.txt
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@ -164,9 +164,17 @@ if(MSVC)
set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/libllvm-c.exports)
if(CMAKE_CROSSCOMPILING)
build_native_tool(llvm-nm llvm_nm)
set(llvm_nm_target "${llvm_nm}")
else()
set(llvm_nm $<TARGET_FILE:llvm-nm>)
set(llvm_nm_target llvm-nm)
endif()
add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
COMMAND ${PYTHON_EXECUTABLE} ${GEN_SCRIPT} --libsfile ${LIBSFILE} ${GEN_UNDERSCORE} --nm ${LLVM_TOOLS_BINARY_DIR}/llvm-nm -o ${LLVM_EXPORTED_SYMBOL_FILE}
DEPENDS ${LIB_NAMES} llvm-nm
COMMAND ${PYTHON_EXECUTABLE} ${GEN_SCRIPT} --libsfile ${LIBSFILE} ${GEN_UNDERSCORE} --nm "${llvm_nm}" -o ${LLVM_EXPORTED_SYMBOL_FILE}
DEPENDS ${LIB_NAMES} ${llvm_nm_target}
COMMENT "Generating export list for LLVM-C"
VERBATIM )