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include (ExternalProject)
set(re2_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/external/re2/re2
${CMAKE_CURRENT_BINARY_DIR}/external/re2)
set(re2_EXTRA_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/re2/src/re2)
set(re2_URL https://github.com/google/re2.git)
set(re2_TAG 791beff)
set(re2_BUILD ${CMAKE_BINARY_DIR}/re2/src/re2)
set(re2_LIBRARIES ${re2_BUILD}/obj/so/libre2.so)
get_filename_component(re2_STATIC_LIBRARIES ${re2_BUILD}/libre2.a ABSOLUTE)
set(re2_INCLUDES ${re2_BUILD})
# We only need re2.h in external/re2/re2/re2.h
# For the rest, we'll just add the build dir as an include dir.
set(re2_HEADERS
"${re2_BUILD}/re2/re2.h"
"${re2_BUILD}/re2/stringpiece.h"
"${re2_BUILD}/re2/variadic_function.h"
)
ExternalProject_Add(re2
PREFIX re2
GIT_REPOSITORY ${re2_URL}
GIT_TAG ${re2_TAG}
DOWNLOAD_DIR "${DOWNLOAD_LOCATION}"
BUILD_IN_SOURCE 1
INSTALL_COMMAND ""
CMAKE_CACHE_ARGS
-DCMAKE_BUILD_TYPE:STRING=Release
-DCMAKE_VERBOSE_MAKEFILE:BOOL=OFF
-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON
)
## put re2 includes in the directory where they are expected
add_custom_target(re2_create_destination_dir
COMMAND ${CMAKE_COMMAND} -E make_directory ${re2_INCLUDE_DIR}/re2
DEPENDS re2)
add_custom_target(re2_copy_headers_to_destination
DEPENDS re2_create_destination_dir)
foreach(header_file ${re2_HEADERS})
add_custom_command(TARGET re2_copy_headers_to_destination PRE_BUILD
COMMAND ${CMAKE_COMMAND} -E copy ${header_file} ${re2_INCLUDE_DIR}/re2)
endforeach()
ADD_LIBRARY(re2_lib STATIC IMPORTED
DEPENDS re2)
SET_TARGET_PROPERTIES(re2_lib PROPERTIES
IMPORTED_LOCATION ${re2_STATIC_LIBRARIES})
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