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# Find LLVM
#
# It defines the following variables
# LLVM_FOUND - True if llvm found.
# LLVM_INCLUDE_DIRS - where to find llvm include files
# LLVM_LIBRARY_DIRS - where to find llvm libs
# LLVM_CFLAGS - llvm compiler flags
# LLVM_LDFLAGS - llvm linker flags
# LLVM_MODULE_LIBS - list of llvm libs for working with modules.
find_program(LLVM_CONFIG_EXECUTABLE llvm-config DOC "llvm-config executable")
if (LLVM_CONFIG_EXECUTABLE)
message(STATUS "LLVM llvm-config found at: ${LLVM_CONFIG_EXECUTABLE}")
else (LLVM_CONFIG_EXECUTABLE)
message(FATAL_ERROR "Could NOT find LLVM executable")
endif (LLVM_CONFIG_EXECUTABLE)
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --version
OUTPUT_VARIABLE LLVM_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
)
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*" "\\1" LLVM_VERSION_MAJOR
"${LLVM_VERSION}")
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*" "\\2" LLVM_VERSION_MINOR
"${LLVM_VERSION}")
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --includedir
OUTPUT_VARIABLE LLVM_INCLUDE_DIRS
OUTPUT_STRIP_TRAILING_WHITESPACE
)
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --libdir
OUTPUT_VARIABLE LLVM_LIBRARY_DIRS
OUTPUT_STRIP_TRAILING_WHITESPACE
)
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --cppflags
OUTPUT_VARIABLE LLVM_CFLAGS
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (LLVM_CFLAGS MATCHES "\\-DNDEBUG")
set(LLVM_WITH_NDEBUG TRUE)
else (LLVM_CFLAGS MATCHES "\\-DNDEBUG")
set(LLVM_WITH_NDEBUG FALSE)
endif (LLVM_CFLAGS MATCHES "\\-DNDEBUG")
find_library(LLVM_MODULE_LIBS LLVM-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} ${LLVM_LIBRARY_DIRS})
if (NOT LLVM_MODULE_LIBS)
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --libs
OUTPUT_VARIABLE LLVM_MODULE_LIBS
OUTPUT_STRIP_TRAILING_WHITESPACE
)
endif (NOT LLVM_MODULE_LIBS)
execute_process(
COMMAND ${LLVM_CONFIG_EXECUTABLE} --ldflags
OUTPUT_VARIABLE LLVM_LDFLAGS
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (LLVM_CONFIG_EXECUTABLE)
set(LLVM_FOUND TRUE)
endif (LLVM_CONFIG_EXECUTABLE)
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