Mirrors/openrw
1
0
Fork 0
mirror of https://github.com/rwengine/openrw.git synced 2024-11-22 10:22:52 +01:00
Code Issues Projects Releases Activity

cmake: simplify FindSDL2 + detect SDL2 version

Browse Source 
+ allow switching between static and shared SDL2
  without complete reconfiguration and rebuild.
This commit is contained in:
Anonymous Maarten 2018-09-17 19:02:40 +02:00
parent 9ea287606d
commit 8efde3a5cb
2 changed files with 148 additions and 141 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
CMakeLists.txt
View File

@ -40,7 +40,7 @@ else()
endif() endif()
# Do not link to SDL2main library # Do not link to SDL2main library
set(SDL2_BUILDING_LIBRARY True) set(SDL2_BUILDING_LIBRARY TRUE)
find_package(OpenAL REQUIRED) find_package(OpenAL REQUIRED)
find_package(Bullet REQUIRED) find_package(Bullet REQUIRED)

247
cmake/modules/FindSDL2.cmake
View File

@ -1,8 +1,10 @@
# Locate SDL2 library # Locate SDL2 library
# This module defines # This module defines:
# SDL2_LIBRARY, the name of the library to link against # - SDL2_LIBRARY, the name of the library to link against
# SDL2_FOUND, if false, do not try to link to SDL2 # - SDL2_FOUND, if false, do not try to link to SDL2
# SDL2_INCLUDE_DIR, where to find SDL.h # - SDL2_INCLUDE_DIR, where to find SDL.h
# and creates:
# - SDL2::SDL2 imported target
# #
# This module responds to the the flag: # This module responds to the the flag:
# SDL2_BUILDING_LIBRARY # SDL2_BUILDING_LIBRARY
@ -12,21 +14,15 @@
# module will attempt to locate and set the the proper link flags # module will attempt to locate and set the the proper link flags
# as part of the returned SDL2_LIBRARY variable. # as part of the returned SDL2_LIBRARY variable.
# #
# SDL2_STATIC
# If this is defined, this module will search for static libraries.
# On Windows, it is uncertain whether a .lib belongs to a dynamic or static SDL2 build.
#
# Don't forget to include SDL2main.h and SDL2main.m your project for the # Don't forget to include SDL2main.h and SDL2main.m your project for the
# OS X framework based version. (Other versions link to -lSDL2main which # OS X framework based version. (Other versions link to -lSDL2main which
# this module will try to find on your behalf.) Also for OS X, this # this module will try to find on your behalf.) Also for OS X, this
# module will automatically add the -framework Cocoa on your behalf. # module will automatically add the -framework Cocoa on your behalf.
# #
#
# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration
# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library
# (SDL2.dll, libsdl2.so, SDL2.framework, etc).
# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.
# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
# as appropriate. These values are used to generate the final SDL2_LIBRARY
# variable, but when these values are unset, SDL2_LIBRARY does not get created.
#
#
# $SDL2DIR is an environment variable that would # $SDL2DIR is an environment variable that would
# correspond to the ./configure --prefix=$SDL2DIR # correspond to the ./configure --prefix=$SDL2DIR
# used in building SDL2. # used in building SDL2.
@ -70,11 +66,11 @@
# (To distribute this file outside of CMake, substitute the full # (To distribute this file outside of CMake, substitute the full
# License text for the above reference.) # License text for the above reference.)
find_path(SDL2_INCLUDE_DIR SDL.h
FIND_PATH(SDL2_INCLUDE_DIR SDL.h
HINTS HINTS
$ENV{SDL2DIR} $ENV{SDL2DIR}
PATH_SUFFIXES include/SDL2 include PATH_SUFFIXES
include/SDL2 include
PATHS PATHS
~/Library/Frameworks ~/Library/Frameworks
/Library/Frameworks /Library/Frameworks
@ -84,126 +80,137 @@ FIND_PATH(SDL2_INCLUDE_DIR SDL.h
/opt/local # DarwinPorts /opt/local # DarwinPorts
/opt/csw # Blastwave /opt/csw # Blastwave
/opt /opt
) )
#MESSAGE("SDL2_INCLUDE_DIR is ${SDL2_INCLUDE_DIR}")
FIND_LIBRARY(SDL2_LIBRARY_PATH find_library(SDL2_SHARED_LIBRARY_PATH
NAMES SDL2 NAMES SDL2
HINTS HINTS
$ENV{SDL2DIR} $ENV{SDL2DIR}
PATH_SUFFIXES lib64 lib PATH_SUFFIXES
PATHS lib64 lib
/sw
/opt/local
/opt/csw
/opt
)
set(SDL2_LIBRARY_ONLY ${SDL2_LIBRARY_PATH} CACHE STRING "The SDL2 library, with no other libraries.")
set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_PATH})
#MESSAGE("SDL2_LIBRARY_TEMP is ${SDL2_LIBRARY_TEMP}")
IF(NOT SDL2_BUILDING_LIBRARY)
IF(NOT ${SDL2_INCLUDE_DIR} 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
# necessarily need it.
FIND_LIBRARY(SDL2MAIN_LIBRARY
NAMES SDL2main
HINTS
$ENV{SDL2DIR}
PATH_SUFFIXES lib64 lib
PATHS PATHS
/sw /sw
/opt/local /opt/local
/opt/csw /opt/csw
/opt /opt
) )
ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
ENDIF(NOT SDL2_BUILDING_LIBRARY) find_library(SDL2_STATIC_LIBRARY_PATH
NAMES libSDL2.lib libSDL2.a SDL2.lib SDL2.a
HINTS
$ENV{SDL2DIR}
PATH_SUFFIXES
lib64 lib
PATHS
/sw
/opt/local
/opt/csw
/opt
)
if(SDL2_STATIC)
set(SDL2_LIBRARY_PATH ${SDL2_STATIC_LIBRARY_PATH})
else()
set(SDL2_LIBRARY_PATH ${SDL2_SHARED_LIBRARY_PATH})
endif()
find_library(SDL2_SDL2MAIN_LIBRARY_PATH
NAMES libSDL2main.lib libSDL2main.a SDL2main.lib SDL2main.a
HINTS
$ENV{SDL2DIR}
PATH_SUFFIXES
lib64 lib
PATHS
~/Library/Frameworks
/Library/Frameworks
/usr/local/include/SDL2
/usr/include/SDL2
/sw # Fink
/opt/local # DarwinPorts
/opt/csw # Blastwave
/opt
)
if(SDL2_INCLUDE_DIR)
file(READ "${SDL2_INCLUDE_DIR}/SDL_version.h" _SDL_VERSION_H)
set(SDL2_REGEXES
"SDL_MAJOR_VERSION[ ]+([0-9]+)"
"SDL_MINOR_VERSION[ ]+([0-9]+)"
"SDL_PATCHLEVEL[ ]+([0-9]+)"
)
set(_SDL2_VERSION)
foreach(_SDL2_REGEX ${SDL2_REGEXES})
string(REGEX MATCH "${_SDL2_REGEX}" _SDL2_NUMBER "${_SDL_VERSION_H}")
if(NOT _SDL2_NUMBER)
message(AUTHOR_WARNING "Cannot detect SDL2 version: regex \"${_SDL2_REGEX}\" does not match")
endif()
list(APPEND _SDL2_VERSION "${CMAKE_MATCH_1}")
endforeach()
string(REPLACE ";" "." SDL2_VERSION "${_SDL2_VERSION}")
endif()
set(SDL2_DEPENDENCIES)
# For SDLmain
if(SDL2_STATIC)
list(APPEND SDL2_DEPENDENCIES ${CMAKE_DL_LIBS})
endif()
if(SDL2_STATIC AND NOT SDL2_BUILDING_LIBRARY)
list(APPEND SDL2_DEPENDENCIES ${SDL2_SDL2MAIN_LIBRARY_PATH})
endif()
# 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)
list(APPEND SDL2_DEPENDENCIES "-framework Cocoa")
endif()
# SDL2 may require threads on your system. # SDL2 may require threads on your system.
# The Apple build may not need an explicit flag because one of the # The Apple build may not need an explicit flag because one of the
# frameworks may already provide it. # frameworks may already provide it.
# But for non-OSX systems, I will use the CMake Threads package. # But for non-OSX systems, I will use the CMake Threads package.
IF(NOT APPLE) # In fact, there seems to be a problem if I used the Threads package
FIND_PACKAGE(Threads) # and try using this line, so I'm just skipping it entirely for OS X.
ENDIF(NOT APPLE) if(NOT APPLE)
find_package(Threads REQUIRED)
list(APPEND SDL2_DEPENDENCIES Threads::Threads)
endif()
# MinGW needs an additional library, mwindows # MinGW needs an additional library, mwindows
# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows # It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -lmwindows
# (Actually on second look, I think it only needs one of the m* libraries.) # (Actually on second look, I think it only needs one of the m* libraries.)
IF(MINGW) if(MINGW)
SET(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW") set(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
ENDIF(MINGW) list(APPEND SDL2_DEPENDENCIES ${MINGW32_LIBRARY})
endif()
SET(SDL2_FOUND "NO")
IF(SDL2_LIBRARY_TEMP) if(WIN32)
# For SDL2main list(APPEND SDL2_DEPENDENCIES winmm imm32 version msimg32)
IF(NOT SDL2_BUILDING_LIBRARY) endif()
IF(SDL2MAIN_LIBRARY)
SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) set(SDL2_LIBRARY ${SDL2_LIBRARY_PATH} ${SDL2_DEPENDENCIES})
ENDIF(SDL2MAIN_LIBRARY)
ENDIF(NOT SDL2_BUILDING_LIBRARY) set(SDL2_REQUIRED_LIBS SDL2_LIBRARY_PATH)
if(NOT SDL2_BUILDING_LIBRARY)
# For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa. list(APPEND SDL2_REQUIRED_LIBS SDL2_SDL2MAIN_LIBRARY_PATH)
# CMake doesn't display the -framework Cocoa string in the UI even endif()
# though it actually is there if I modify a pre-used variable.
# I think it has something to do with the CACHE STRING. include(FindPackageHandleStandardArgs)
# So I use a temporary variable until the end so I can set the find_package_handle_standard_args(SDL2
# "real" variable in one-shot. FOUND_VAR SDL2_FOUND
IF(APPLE) REQUIRED_VARS ${SDL2_REQUIRED_LIBS} SDL2_INCLUDE_DIR
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa") VERSION_VAR SDL2_VERSION
ENDIF(APPLE) )
# For threads, as mentioned Apple doesn't need this. if(SDL2_FOUND)
# In fact, there seems to be a problem if I used the Threads package add_library(SDL2::SDL2 INTERFACE IMPORTED)
# and try using this line, so I'm just skipping it entirely for OS X. set_property(TARGET SDL2::SDL2
IF(NOT APPLE) PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${SDL2_INCLUDE_DIR})
SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT}) set_property(TARGET SDL2::SDL2
ENDIF(NOT APPLE) PROPERTY INTERFACE_LINK_LIBRARIES ${SDL2_LIBRARY})
# For MinGW library
IF(MINGW)
SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
ENDIF(MINGW)
IF(WIN32)
SET(SDL2_LIBRARY_TEMP winmm imm32 version msimg32 ${SDL2_LIBRARY_TEMP})
ENDIF(WIN32)
# 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(SDL2_FOUND "YES")
ENDIF(SDL2_LIBRARY_TEMP)
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2
REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
IF(SDL2_STATIC)
if (UNIX AND NOT APPLE)
EXECUTE_PROCESS(COMMAND sdl2-config --static-libs OUTPUT_VARIABLE SDL2_LINK_FLAGS)
STRING(REGEX REPLACE "(\r?\n)+$" "" SDL2_LINK_FLAGS "${SDL2_LINK_FLAGS}")
SET(SDL2_LIBRARY ${SDL2_LINK_FLAGS})
ENDIF()
ENDIF(SDL2_STATIC)
if(SDL2_FOUND AND NOT TARGET SDL2::SDL2)
add_library(SDL2 INTERFACE)
target_link_libraries(SDL2
INTERFACE
${SDL2_LIBRARY}
)
target_include_directories(SDL2 SYSTEM
INTERFACE
"${SDL2_INCLUDE_DIR}"
)
add_library(SDL2::SDL2 ALIAS SDL2)
endif() endif()