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Add option LLVM_NM to allow specifying the location of the llvm-nm tool

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The new option works like the existing LLVM_TABLEGEN, and
LLVM_CONFIG_PATH options.  Instead of building llvm-nm, the build uses
the executable defined by LLVM_NM.

This is useful for cross-compilation scenarios where the host cannot run
the cross-compiled tool, and recursing into another cmake build is not
an option (due to required DEFINE's, for example).

Reviewed By: smeenai

Differential Revision: https://reviews.llvm.org/D83022
This commit is contained in:
Arlo Siemsen 2020-07-06 13:17:22 -07:00 committed by Shoaib Meenai
parent c554e8d06e
commit 07457fd3ce
1 changed files with 10 additions and 6 deletions
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6
tools/llvm-shlib/CMakeLists.txt
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@ -154,7 +154,7 @@ if(LLVM_BUILD_LLVM_C_DYLIB AND MSVC)
set(GEN_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/gen-msvc-exports.py) set(GEN_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/gen-msvc-exports.py)
set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/libllvm-c.exports) set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/libllvm-c.exports)
if(NOT LLVM_NM)
if(CMAKE_CROSSCOMPILING) if(CMAKE_CROSSCOMPILING)
build_native_tool(llvm-nm llvm_nm) build_native_tool(llvm-nm llvm_nm)
set(llvm_nm_target "${llvm_nm}") set(llvm_nm_target "${llvm_nm}")
@ -162,6 +162,10 @@ if(LLVM_BUILD_LLVM_C_DYLIB AND MSVC)
set(llvm_nm $<TARGET_FILE:llvm-nm>) set(llvm_nm $<TARGET_FILE:llvm-nm>)
set(llvm_nm_target llvm-nm) set(llvm_nm_target llvm-nm)
endif() endif()
else()
set(llvm_nm ${LLVM_NM})
set(llvm_nm_target "")
endif()
add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE} add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
COMMAND "${Python3_EXECUTABLE}" ${GEN_SCRIPT} --libsfile ${LIBSFILE} ${GEN_UNDERSCORE} --nm "${llvm_nm}" -o ${LLVM_EXPORTED_SYMBOL_FILE} COMMAND "${Python3_EXECUTABLE}" ${GEN_SCRIPT} --libsfile ${LIBSFILE} ${GEN_UNDERSCORE} --nm "${llvm_nm}" -o ${LLVM_EXPORTED_SYMBOL_FILE}