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Support override CLANG_RESOURCE_DIR

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The result from clang commandline is something like
/usr/lib/llvm-7/lib/clang/7.0.1

Which means I need to recompile when the clang is upgraded to newer 7.x.x

However the system has a convenient symlink, which is
/usr/include/clang/7.
This commit is contained in:
Shengjing Zhu 2019-08-11 18:06:47 +08:00 committed by Fangrui Song
parent 6528dcb81d
commit 5200f431f1
1 changed files with 16 additions and 14 deletions
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30
CMakeLists.txt
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@ -120,22 +120,24 @@ endif()
# Find Clang resource directory with Clang executable.
find_program(CLANG_EXECUTABLE clang)
if(NOT CLANG_EXECUTABLE)
message(FATAL_ERROR "clang executable not found.")
endif()
if(NOT CLANG_RESOURCE_DIR)
find_program(CLANG_EXECUTABLE clang)
if(NOT CLANG_EXECUTABLE)
message(FATAL_ERROR "clang executable not found.")
endif()
execute_process(
COMMAND ${CLANG_EXECUTABLE} -print-resource-dir
RESULT_VARIABLE CLANG_FIND_RESOURCE_DIR_RESULT
OUTPUT_VARIABLE CLANG_RESOURCE_DIR
ERROR_VARIABLE CLANG_FIND_RESOURCE_DIR_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
execute_process(
COMMAND ${CLANG_EXECUTABLE} -print-resource-dir
RESULT_VARIABLE CLANG_FIND_RESOURCE_DIR_RESULT
OUTPUT_VARIABLE CLANG_RESOURCE_DIR
ERROR_VARIABLE CLANG_FIND_RESOURCE_DIR_ERROR
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(CLANG_FIND_RESOURCE_DIR_RESULT)
message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \
executable. Output:\n ${CLANG_FIND_RESOURCE_DIR_ERROR}")
if(CLANG_FIND_RESOURCE_DIR_RESULT)
message(FATAL_ERROR "Error retrieving Clang resource directory with Clang \
executable. Output:\n ${CLANG_FIND_RESOURCE_DIR_ERROR}")
endif()
endif()
set_property(SOURCE src/utils.cc APPEND PROPERTY COMPILE_DEFINITIONS