Files
libgit2/cmake/SelectRegex.cmake
2025-01-02 12:36:11 +00:00

65 lines
2.0 KiB
CMake

# Specify regular expression implementation
find_package(PCRE)
set(OPTION_NAME "USE_REGEX")
# Fall back to the previous cmake configuration, "USE_BUNDLED_ZLIB"
if(NOT USE_REGEX AND REGEX_BACKEND)
set(USE_REGEX "${REGEX_BACKEND}")
set(OPTION_NAME "REGEX_BACKEND")
endif()
if(NOT USE_REGEX)
check_symbol_exists(regcomp_l "regex.h;xlocale.h" HAVE_REGCOMP_L)
if(HAVE_REGCOMP_L)
# 'regcomp_l' has been explicitly marked unavailable on iOS_SDK
if(CMAKE_SYSTEM_NAME MATCHES "iOS")
set(USE_REGEX "regcomp")
else()
set(USE_REGEX "regcomp_l")
endif()
elseif(PCRE_FOUND)
set(USE_REGEX "pcre")
else()
set(USE_REGEX "builtin")
endif()
endif()
if(USE_REGEX STREQUAL "regcomp_l")
add_feature_info("Regular expressions" ON "using system regcomp_l")
set(GIT_REGEX_REGCOMP_L 1)
elseif(USE_REGEX STREQUAL "pcre2")
find_package(PCRE2)
if(NOT PCRE2_FOUND)
MESSAGE(FATAL_ERROR "PCRE2 support was requested but not found")
endif()
add_feature_info("Regular expressions" ON "using system PCRE2")
set(GIT_REGEX_PCRE2 1)
list(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE2_INCLUDE_DIRS})
list(APPEND LIBGIT2_SYSTEM_LIBS ${PCRE2_LIBRARIES})
list(APPEND LIBGIT2_PC_REQUIRES "libpcre2-8")
elseif(USE_REGEX STREQUAL "pcre")
add_feature_info("Regular expressions" ON "using system PCRE")
set(GIT_REGEX_PCRE 1)
list(APPEND LIBGIT2_SYSTEM_INCLUDES ${PCRE_INCLUDE_DIRS})
list(APPEND LIBGIT2_SYSTEM_LIBS ${PCRE_LIBRARIES})
list(APPEND LIBGIT2_PC_REQUIRES "libpcre")
elseif(USE_REGEX STREQUAL "regcomp")
add_feature_info("Regular expressions" ON "using system regcomp")
set(GIT_REGEX_REGCOMP 1)
elseif(USE_REGEX STREQUAL "builtin")
add_feature_info("Regular expressions" ON "using bundled implementation")
set(GIT_REGEX_BUILTIN 1)
add_subdirectory("${PROJECT_SOURCE_DIR}/deps/pcre" "${PROJECT_BINARY_DIR}/deps/pcre")
list(APPEND LIBGIT2_DEPENDENCY_INCLUDES "${PROJECT_SOURCE_DIR}/deps/pcre")
list(APPEND LIBGIT2_DEPENDENCY_OBJECTS $<TARGET_OBJECTS:pcre>)
else()
message(FATAL_ERROR "unknown setting to ${OPTION_NAME}: ${USE_REGEX}")
endif()