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MacOS version check using try_compile: #1103

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This change will work as well when cross-compiling.
This commit is contained in:
Matthias Melcher 2024-11-04 22:35:43 +01:00
parent 71a61d9cbf
commit a77cc0cb35
2 changed files with 20 additions and 22 deletions
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12
CMake/macOSMaxAllowed.c
View File

@ -1,8 +1,6 @@
#include <Availability.h>
#include <stdio.h>
int main(int argc, char **argv) {
unsigned int ver = __MAC_OS_X_VERSION_MAX_ALLOWED;
printf("%d.%d.%d", ver/10000, (ver/100)%100, ver%100);
return 0;
}
#include <AvailabilityMacros.h>
#if __MAC_OS_X_VERSION_MAX_ALLOWED < SDK_VERSION_CHECK
#error __MAC_OS_X_VERSION_MAX_ALLOWED < SDK_VERSION_CHECK
#endif
int main(int, char**) { return 0; }

30
CMake/setup.cmake
View File

@ -111,25 +111,23 @@ if(CMAKE_GENERATOR MATCHES "Xcode")
endif()
if(APPLE)
# Check if the __MAC_OS_X_VERSION_MAX_ALLOWED compile time macro is at least
# the version encoded in SDK_VERSION and return TRUE or FALSE in RESULT.
macro(CHECK_OSX_MAX_ALLOWED SDK_VERSION RESULT)
try_compile(LOCAL_RESULT
${CMAKE_BINARY_DIR}/CMakeTmpDup
SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/CMake/macOSMaxAllowed.c
COMPILE_DEFINITIONS -DSDK_VERSION_CHECK=${SDK_VERSION}
)
set(${RESULT} ${LOCAL_RESULT})
endmacro()
# APPLE macOS setup
set(HAVE_STRCASECMP 1)
set(HAVE_DIRENT_H 1)
set(HAVE_SNPRINTF 1)
set(HAVE_VSNPRINTF 1)
set(HAVE_SCANDIR 1)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated")
# Retrieve the value of the macOS compile-time macro
# __MAC_OS_X_VERSION_MAX_ALLOWED. This is needed to decide which
# frameworks must be linked later.
try_run(
RUN_RESULT COMPILE_RESULT
SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/CMake/macOSMaxAllowed.c
RUN_OUTPUT_VARIABLE MAC_OS_X_VERSION_MAX_ALLOWED
)
if (NOT COMPILE_RESULT)
set(MAC_OS_X_VERSION_MAX_ALLOWED ${CURRENT_OSX_VERSION})
endif()
fl_debug_var(CMAKE_OSX_DEPLOYMENT_TARGET)
fl_debug_var(MAC_OS_X_VERSION_MAX_ALLOWED)
if(FLTK_BACKEND_X11)
if(NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 17.0.0)) # a.k.a. macOS version ≥ 10.13
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_HAS_THREAD_API_PTHREAD")
@ -137,10 +135,12 @@ if(APPLE)
else()
set(FLTK_COCOA_FRAMEWORKS "-framework Cocoa")
if (NOT (CMAKE_OSX_ARCHITECTURES STREQUAL "ppc" OR CMAKE_OSX_ARCHITECTURES STREQUAL "i386"))
if(${MAC_OS_X_VERSION_MAX_ALLOWED} VERSION_GREATER_EQUAL 11.0)
CHECK_OSX_MAX_ALLOWED(110000 SDK_AVAILABLE) # at least SDK 11.0.0 ?
if (SDK_AVAILABLE)
list(APPEND FLTK_COCOA_FRAMEWORKS "-weak_framework UniformTypeIdentifiers")
endif()
if(${MAC_OS_X_VERSION_MAX_ALLOWED} VERSION_GREATER_EQUAL 15.0)
CHECK_OSX_MAX_ALLOWED(150000 SDK_AVAILABLE) # at least SDK 15.0.0 ?
if (SDK_AVAILABLE)
list(APPEND FLTK_COCOA_FRAMEWORKS "-weak_framework ScreenCaptureKit")
endif()
endif()