qt5base-lts/cmake/FindWrapSystemPCRE2.cmake
Alexandru Croitor af56a6f0cb CMake: Don't force CONFIG mode when looking for system PCRE2
This allows picking up 3rd party Find modules. One use case is
Conan-generated Find modules.

Also add TODO in case we ever need to handle finding the upstream
target name rather than the Hunter chosen one.

Pick-to: 6.2 6.3 6.4
Fixes: QTBUG-104542
Change-Id: I243987c657f74e8127076666d9734b2b657bc0ee
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>
2022-07-02 00:11:12 +02:00

64 lines
2.3 KiB
CMake

if(TARGET WrapSystemPCRE2::WrapSystemPCRE2)
set(WrapSystemPCRE2_FOUND TRUE)
return()
endif()
set(WrapSystemPCRE2_REQUIRED_VARS __pcre2_found)
find_package(PCRE2 ${${CMAKE_FIND_PACKAGE_NAME}_FIND_VERSION} COMPONENTS 16BIT QUIET)
# TODO: pcre2-16 is not the target name provided by the upstream Config file. It is PCRE2::16BIT.
# https://github.com/PCRE2Project/pcre2/blob/2410fbe3869cab403f02b94caa9ab37ee9f5854b/cmake/pcre2-config.cmake.in#L122
# We don't strictly need to handle that though, because the pkg-config code path below still
# finds the correct libraries.
set(__pcre2_target_name "PCRE2::pcre2-16")
if(PCRE2_FOUND AND TARGET "${__pcre2_target_name}")
# Hunter case.
set(__pcre2_found TRUE)
if(PCRE2_VERSION)
set(WrapSystemPCRE2_VERSION "${PCRE2_VERSION}")
endif()
endif()
if(NOT __pcre2_found)
list(PREPEND WrapSystemPCRE2_REQUIRED_VARS PCRE2_LIBRARIES PCRE2_INCLUDE_DIRS)
find_package(PkgConfig QUIET)
pkg_check_modules(PC_PCRE2 QUIET libpcre2-16)
find_path(PCRE2_INCLUDE_DIRS
NAMES pcre2.h
HINTS ${PC_PCRE2_INCLUDEDIR})
find_library(PCRE2_LIBRARY_RELEASE
NAMES pcre2-16
HINTS ${PC_PCRE2_LIBDIR})
find_library(PCRE2_LIBRARY_DEBUG
NAMES pcre2-16d pcre2-16
HINTS ${PC_PCRE2_LIBDIR})
include(SelectLibraryConfigurations)
select_library_configurations(PCRE2)
if(PC_PCRE2_VERSION)
set(WrapSystemPCRE2_VERSION "${PC_PCRE2_VERSION}")
endif()
if (PCRE2_LIBRARIES AND PCRE2_INCLUDE_DIRS)
set(__pcre2_found TRUE)
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(WrapSystemPCRE2
REQUIRED_VARS ${WrapSystemPCRE2_REQUIRED_VARS}
VERSION_VAR WrapSystemPCRE2_VERSION)
if(WrapSystemPCRE2_FOUND)
add_library(WrapSystemPCRE2::WrapSystemPCRE2 INTERFACE IMPORTED)
if(TARGET "${__pcre2_target_name}")
target_link_libraries(WrapSystemPCRE2::WrapSystemPCRE2 INTERFACE "${__pcre2_target_name}")
else()
target_link_libraries(WrapSystemPCRE2::WrapSystemPCRE2 INTERFACE ${PCRE2_LIBRARIES})
target_include_directories(WrapSystemPCRE2::WrapSystemPCRE2 INTERFACE ${PCRE2_INCLUDE_DIRS})
endif()
endif()
unset(__pcre2_target_name)
unset(__pcre2_found)