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add pkg-config fallback and imported target to sdl find module

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Green Sky 2023-10-31 14:48:50 +01:00
parent 3a885ee250
commit 9b173c64a6
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2 changed files with 62 additions and 46 deletions
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2
.github/workflows/cmake.yml vendored
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@ -14,7 +14,7 @@ env:
jobs:
linux:
timeout-minutes: 10
timeout-minutes: 15
# The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
# You can convert this to a matrix build if you need cross-platform coverage.

106
cmake/FindSDL2.cmake
View File

@ -105,7 +105,7 @@
if(NOT EMSCRIPTEN)
FIND_PATH(SDL2_INCLUDE_DIR SDL.h
FIND_PATH(SDL2_INCLUDE_DIR_TEMP SDL.h
HINTS
$ENV{SDL2}
PATH_SUFFIXES include/SDL2 include SDL2
@ -153,7 +153,7 @@ ELSE(CMAKE_SIZEOF_VOID_P EQUAL 8)
ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)
IF(NOT SDL2_BUILDING_LIBRARY)
IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
IF(NOT "${SDL2_INCLUDE_DIR_TEMP}" MATCHES ".framework")
# Non-OS X framework versions expect you to also dynamically link to
# SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
# seem to provide SDL2main for compatibility even though they don't
@ -189,7 +189,7 @@ IF(NOT SDL2_BUILDING_LIBRARY)
/opt
)
ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)
ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
ENDIF(NOT "${SDL2_INCLUDE_DIR_TEMP}" MATCHES ".framework")
ENDIF(NOT SDL2_BUILDING_LIBRARY)
# SDL2 may require threads on your system.
@ -208,58 +208,67 @@ IF(MINGW)
ENDIF(MINGW)
SET(SDL2_FOUND "NO")
IF(SDL2_LIBRARY_TEMP)
# For SDL2main
IF(NOT SDL2_BUILDING_LIBRARY)
IF(SDL2MAIN_LIBRARY)
SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
ENDIF(SDL2MAIN_LIBRARY)
ENDIF(NOT SDL2_BUILDING_LIBRARY)
IF(SDL2_LIBRARY_TEMP)
# For SDL2main
IF(NOT SDL2_BUILDING_LIBRARY)
IF(SDL2MAIN_LIBRARY)
SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
ENDIF(SDL2MAIN_LIBRARY)
ENDIF(NOT SDL2_BUILDING_LIBRARY)
# For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
# CMake doesn't display the -framework Cocoa string in the UI even
# though it actually is there if I modify a pre-used variable.
# I think it has something to do with the CACHE STRING.
# So I use a temporary variable until the end so I can set the
# "real" variable in one-shot.
IF(APPLE)
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
ENDIF(APPLE)
# For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
# CMake doesn't display the -framework Cocoa string in the UI even
# though it actually is there if I modify a pre-used variable.
# I think it has something to do with the CACHE STRING.
# So I use a temporary variable until the end so I can set the
# "real" variable in one-shot.
IF(APPLE)
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
ENDIF(APPLE)
# For threads, as mentioned Apple doesn't need this.
# In fact, there seems to be a problem if I used the Threads package
# and try using this line, so I'm just skipping it entirely for OS X.
IF(NOT APPLE)
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
ENDIF(NOT APPLE)
# For threads, as mentioned Apple doesn't need this.
# In fact, there seems to be a problem if I used the Threads package
# and try using this line, so I'm just skipping it entirely for OS X.
IF(NOT APPLE)
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
ENDIF(NOT APPLE)
# For MinGW library
IF(MINGW)
SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
ENDIF(MINGW)
# For MinGW library
IF(MINGW)
SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
ENDIF(MINGW)
# Set the final string here so the GUI reflects the final state.
SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
# Set the final string here so the GUI reflects the final state.
SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
############add_library(SDL UNKNOWN IMPORTED)
#target_link_libraries(SDL INTERFACE ${SDL2_LIBRARY})
#target_include_directories(SDL INTERFACE ${SDL2_INCLUDE_DIR})
#set_target_properties(SDL PROPERTIES IMPORTED_LINK_INTERFACE_LIBRARIES "${SDL2_LIBRARY}")
set(SDL2_INCLUDE_DIR ${SDL2_INCLUDE_DIR_TEMP} CACHE STRING "Where the SDL2 Headers can be found")
SET(SDL2_INCLUDE_DIR_TEMP "${SDL2_INCLUDE_DIR_TEMP}" CACHE INTERNAL "")
#set_target_properties(SDL PROPERTIES
#INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIR}")
SET(SDL2_FOUND "YES")
else() # SDL2_LIBRARY_TEMP
# try to pkg-config fallback
find_package(PkgConfig)
if (PKG_CONFIG_FOUND)
pkg_check_modules(PKG_C_SDL2 QUIET sdl2)
if (PKG_C_SDL2_FOUND)
SET(SDL2_LIBRARY_TEMP ${PKG_C_SDL2_LIBRARIES})
SET(SDL2_INCLUDE_DIR_TEMP ${PKG_C_SDL2_INCLUDE_DIRS})
#set_target_properties(SDL PROPERTIES
#IMPORTED_LINK_INTERFACE_LANGUAGES "C"
#IMPORTED_LINK_INTERFACE_LIBRARIES "${SDL2_LIBRARY}"
#LINK_INTERFACE_LIBRARIES "${SDL2_LIBRARY}")
# Set the final string here so the GUI reflects the final state.
SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
#IMPORTED_LOCATION "${SDL2_LIBRARY}")
set(SDL2_INCLUDE_DIR ${SDL2_INCLUDE_DIR_TEMP} CACHE STRING "Where the SDL2 Headers can be found")
SET(SDL2_INCLUDE_DIR_TEMP "${SDL2_INCLUDE_DIR_TEMP}" CACHE INTERNAL "")
#message("II set include dir to ${SDL2_INCLUDE_DIR}")
SET(SDL2_FOUND "YES")
SET(SDL2_FOUND "YES")
endif()
endif()
ENDIF(SDL2_LIBRARY_TEMP)
else() #emsripten
@ -288,4 +297,11 @@ INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
if (SDL2_FOUND)
if (NOT TARGET SDL2::SDL2)
add_library(SDL2::SDL2 INTERFACE IMPORTED)
target_include_directories(SDL2::SDL2 INTERFACE ${SDL2_INCLUDE_DIR})
target_link_libraries(SDL2::SDL2 INTERFACE ${SDL2_LIBRARY})
endif()
endif()