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cmake: Make test code use proper C main functions.

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Fixes #5021.
This commit is contained in:
Ryan C. Gordon 2022-03-13 12:10:52 -04:00
parent 072db7b005
commit 3ab739afff
No known key found for this signature in database
GPG key ID: FA148B892AB48044
2 changed files with 43 additions and 39 deletions
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53
CMakeLists.txt
View file

@ -293,7 +293,7 @@ if(CYGWIN)
# We build SDL on cygwin without the UNIX emulation layer
target_include_directories(sdl-build-options INTERFACE "/usr/include/mingw")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -mno-cygwin")
check_c_source_compiles("int main(int argc, char **argv) {}"
check_c_source_compiles("int main(int argc, char **argv) { return 0; }"
HAVE_GCC_NO_CYGWIN)
set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})
if(HAVE_GCC_NO_CYGWIN)
@ -545,7 +545,7 @@ if(USE_GCC OR USE_CLANG)
#if !defined(__GNUC__) || __GNUC__ < 3
#error Dependency tracking requires GCC 3.0 or newer
#endif
int main(int argc, char **argv) { }" HAVE_DEPENDENCY_TRACKING)
int main(int argc, char **argv) { return 0; }" HAVE_DEPENDENCY_TRACKING)
endif()
if(SDL_GCC_ATOMICS)
@ -556,17 +556,19 @@ if(USE_GCC OR USE_CLANG)
__sync_lock_test_and_set(&x, y);
__sync_fetch_and_add(&a, 1);
__sync_bool_compare_and_swap(&a, 5, 10);
__sync_bool_compare_and_swap(&x, y, z); }" HAVE_GCC_ATOMICS)
__sync_bool_compare_and_swap(&x, y, z);
return 0; }" HAVE_GCC_ATOMICS)
if(NOT HAVE_GCC_ATOMICS)
check_c_source_compiles("int main(int argc, char **argv) {
int a;
__sync_lock_test_and_set(&a, 1);
__sync_lock_release(&a); }" HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
__sync_lock_release(&a);
return 0; }" HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
endif()
endif()
set(CMAKE_REQUIRED_FLAGS "-mpreferred-stack-boundary=2")
check_c_source_compiles("int x = 0; int main(int argc, char **argv) {}"
check_c_source_compiles("int x = 0; int main(int argc, char **argv) { return 0; }"
HAVE_GCC_PREFERRED_STACK_BOUNDARY)
set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})
@ -575,7 +577,7 @@ if(USE_GCC OR USE_CLANG)
#if !defined(__GNUC__) || __GNUC__ < 4
#error SDL only uses visibility attributes in GCC 4 or newer
#endif
int main(int argc, char **argv) {}" HAVE_GCC_FVISIBILITY)
int main(int argc, char **argv) { return 0; }" HAVE_GCC_FVISIBILITY)
if(HAVE_GCC_FVISIBILITY)
list(APPEND EXTRA_CFLAGS "-fvisibility=hidden")
endif()
@ -631,7 +633,7 @@ if(SDL_ASSEMBLY)
#ifndef __MMX__
#error Assembler CPP flag not enabled
#endif
int main(int argc, char **argv) { }" HAVE_MMX)
int main(int argc, char **argv) { return 0; }" HAVE_MMX)
if(HAVE_MMX)
list(APPEND EXTRA_CFLAGS "-mmmx")
endif()
@ -648,6 +650,7 @@ if(SDL_ASSEMBLY)
int main(int argc, char **argv) {
void *p = 0;
_m_prefetch(p);
return 0;
}" HAVE_3DNOW)
if(HAVE_3DNOW)
list(APPEND EXTRA_CFLAGS "-m3dnow")
@ -671,7 +674,7 @@ if(SDL_ASSEMBLY)
#ifndef __SSE__
#error Assembler CPP flag not enabled
#endif
int main(int argc, char **argv) { }" HAVE_SSE)
int main(int argc, char **argv) { return 0; }" HAVE_SSE)
if(HAVE_SSE)
list(APPEND EXTRA_CFLAGS "-msse")
endif()
@ -694,7 +697,7 @@ if(SDL_ASSEMBLY)
#ifndef __SSE2__
#error Assembler CPP flag not enabled
#endif
int main(int argc, char **argv) { }" HAVE_SSE2)
int main(int argc, char **argv) { return 0; }" HAVE_SSE2)
if(HAVE_SSE2)
list(APPEND EXTRA_CFLAGS "-msse2")
endif()
@ -717,7 +720,7 @@ if(SDL_ASSEMBLY)
#ifndef __SSE3__
#error Assembler CPP flag not enabled
#endif
int main(int argc, char **argv) { }" HAVE_SSE3)
int main(int argc, char **argv) { return 0; }" HAVE_SSE3)
if(HAVE_SSE3)
list(APPEND EXTRA_CFLAGS "-msse3")
endif()
@ -746,12 +749,12 @@ if(SDL_ASSEMBLY)
vector unsigned int vzero() {
return vec_splat_u32(0);
}
int main(int argc, char **argv) { }" HAVE_ALTIVEC_H_HDR)
int main(int argc, char **argv) { return 0; }" HAVE_ALTIVEC_H_HDR)
check_c_source_compiles("
vector unsigned int vzero() {
return vec_splat_u32(0);
}
int main(int argc, char **argv) { }" HAVE_ALTIVEC)
int main(int argc, char **argv) { return 0; }" HAVE_ALTIVEC)
set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})
if(HAVE_ALTIVEC OR HAVE_ALTIVEC_H_HDR)
set(HAVE_ALTIVEC TRUE) # if only HAVE_ALTIVEC_H_HDR is set
@ -878,7 +881,7 @@ if(SDL_LIBC)
# TODO: refine the mprotect check
check_c_source_compiles("#include <sys/types.h>
#include <sys/mman.h>
int main() { }" HAVE_MPROTECT)
int main() { return 0; }" HAVE_MPROTECT)
foreach(_FN
strtod malloc calloc realloc free getenv setenv putenv unsetenv
qsort abs bcopy memset memcpy memmove memcmp strlen strlcpy strlcat
@ -1156,9 +1159,7 @@ if(ANDROID)
#if defined(__ARM_ARCH) && __ARM_ARCH < 7
#error Vulkan doesn't work on this configuration
#endif
int main(void) {
return 0;
}
int main(int argc, char **argv) { return 0; }
" VULKAN_PASSED_ANDROID_CHECKS)
if(VULKAN_PASSED_ANDROID_CHECKS)
set(SDL_VIDEO_VULKAN 1)
@ -1294,7 +1295,7 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS AND NOT HAIKU)
#ifndef EVIOCGNAME
#error EVIOCGNAME() ioctl not available
#endif
int main(int argc, char** argv) {}" HAVE_INPUT_EVENTS)
int main(int argc, char** argv) { return 0; }" HAVE_INPUT_EVENTS)
if(LINUX)
check_c_source_compiles("
@ -1306,6 +1307,7 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS AND NOT HAIKU)
struct kbentry kbe;
kbe.kb_table = KG_CTRL;
ioctl(0, KDGKBENT, &kbe);
return 0;
}" HAVE_INPUT_KD)
elseif(FREEBSD)
check_c_source_compiles("
@ -1316,6 +1318,7 @@ elseif(UNIX AND NOT APPLE AND NOT ANDROID AND NOT RISCOS AND NOT HAIKU)
{
accentmap_t accTable;
ioctl(0, KDENABIO, 1);
return 0;
}" HAVE_INPUT_KBIO)
endif()
@ -1515,7 +1518,7 @@ elseif(WINDOWS)
check_c_source_compiles("
#include <windows.h>
int main(int argc, char **argv) { }" HAVE_WIN32_CC)
int main(int argc, char **argv) { return 0; }" HAVE_WIN32_CC)
file(GLOB CORE_SOURCES ${SDL2_SOURCE_DIR}/src/core/windows/*.c)
set(SOURCE_FILES ${SOURCE_FILES} ${CORE_SOURCES})
@ -1580,22 +1583,22 @@ elseif(WINDOWS)
check_c_source_compiles("
#include <windows.h>
#include <xinput.h>
int main(int argc, char **argv) { }" HAVE_XINPUT_H)
int main(int argc, char **argv) { return 0; }" HAVE_XINPUT_H)
check_c_source_compiles("
#include <windows.h>
#include <xinput.h>
XINPUT_GAMEPAD_EX x1;
int main(int argc, char **argv) { }" HAVE_XINPUT_GAMEPAD_EX)
int main(int argc, char **argv) { return 0; }" HAVE_XINPUT_GAMEPAD_EX)
check_c_source_compiles("
#include <windows.h>
#include <xinput.h>
XINPUT_STATE_EX s1;
int main(int argc, char **argv) { }" HAVE_XINPUT_STATE_EX)
int main(int argc, char **argv) { return 0; }" HAVE_XINPUT_STATE_EX)
check_c_source_compiles("
#define COBJMACROS
#include <windows.gaming.input.h>
__x_ABI_CWindows_CGaming_CInput_CIGamepadStatics2 *s2;
int main(int argc, char **argv) { }" HAVE_WINDOWS_GAMING_INPUT_H)
int main(int argc, char **argv) { return 0; }" HAVE_WINDOWS_GAMING_INPUT_H)
endif()
# headers needed elsewhere
@ -1897,13 +1900,13 @@ elseif(APPLE)
#if TARGET_CPU_X86
#error GameController framework doesn't work on this configuration
#endif
int main() {}" HAVE_FRAMEWORK_GAMECONTROLLER)
int main() { return 0; }" HAVE_FRAMEWORK_GAMECONTROLLER)
check_objc_source_compiles("
#include <AvailabilityMacros.h>
#include <TargetConditionals.h>
#import <Foundation/Foundation.h>
#import <CoreHaptics/CoreHaptics.h>
int main() {}" HAVE_FRAMEWORK_COREHAPTICS)
int main() { return 0; }" HAVE_FRAMEWORK_COREHAPTICS)
if(HAVE_FRAMEWORK_GAMECONTROLLER AND HAVE_FRAMEWORK_COREHAPTICS)
# Only enable MFI if we also have CoreHaptics to ensure rumble works
set(SDL_JOYSTICK_MFI 1)
@ -2020,7 +2023,7 @@ elseif(APPLE)
#if (!TARGET_CPU_X86_64 && !TARGET_CPU_ARM64)
#error Metal doesn't work on this configuration
#endif
int main(void) {}" HAVE_FRAMEWORK_METAL)
int main(int argc, char **argv) { return 0; }" HAVE_FRAMEWORK_METAL)
if(HAVE_FRAMEWORK_METAL)
set(SDL_FRAMEWORK_METAL 1)
set(SDL_FRAMEWORK_QUARTZCORE 1)

29
cmake/sdlchecks.cmake
View file

@ -48,6 +48,7 @@ macro(CheckDLOPEN)
int main(int argc, char **argv) {
void *handle = dlopen(\"\", RTLD_NOW);
const char *loaderror = (char *) dlerror();
return 0;
}" HAVE_DLOPEN)
set(CMAKE_REQUIRED_LIBRARIES)
endif()
@ -57,8 +58,7 @@ macro(CheckO_CLOEXEC)
check_c_source_compiles("
#include <fcntl.h>
int flag = O_CLOEXEC;
int main(void) {
}" HAVE_O_CLOEXEC)
int main(int argc, char **argv) { return 0; }" HAVE_O_CLOEXEC)
endmacro()
# Requires:
@ -68,12 +68,12 @@ macro(CheckOSS)
set(OSS_HEADER_FILE "sys/soundcard.h")
check_c_source_compiles("
#include <sys/soundcard.h>
int main() { int arg = SNDCTL_DSP_SETFRAGMENT; }" OSS_FOUND)
int main(int argc, char **argv) { int arg = SNDCTL_DSP_SETFRAGMENT; return 0; }" OSS_FOUND)
if(NOT OSS_FOUND)
set(OSS_HEADER_FILE "soundcard.h")
check_c_source_compiles("
#include <soundcard.h>
int main() { int arg = SNDCTL_DSP_SETFRAGMENT; }" OSS_FOUND)
int main(int argc, char **argv) { int arg = SNDCTL_DSP_SETFRAGMENT; return 0; }" OSS_FOUND)
endif()
if(OSS_FOUND)
@ -481,7 +481,8 @@ macro(CheckX11)
XGenericEventCookie *cookie = &event.xcookie;
XNextEvent(display, &event);
XGetEventData(display, cookie);
XFreeEventData(display, cookie); }" HAVE_XGENERICEVENT)
XFreeEventData(display, cookie);
return 0; }" HAVE_XGENERICEVENT)
if(HAVE_XGENERICEVENT)
set(SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS 1)
endif()
@ -533,7 +534,7 @@ macro(CheckX11)
{
return (Status)0;
}
int main(int argc, char **argv) {}" HAVE_XINPUT2_MULTITOUCH)
int main(int argc, char **argv) { return 0; }" HAVE_XINPUT2_MULTITOUCH)
if(HAVE_XINPUT2_MULTITOUCH)
set(SDL_VIDEO_DRIVER_X11_XINPUT2_SUPPORTS_MULTITOUCH 1)
endif()
@ -547,7 +548,7 @@ macro(CheckX11)
#include <X11/extensions/XInput2.h>
#include <X11/extensions/Xfixes.h>
BarrierEventID b;
int main(void) { }" HAVE_XFIXES_H)
int main(int argc, char **argv) { return 0; }" HAVE_XFIXES_H)
endif()
if(SDL_X11_XFIXES AND HAVE_XFIXES_H AND HAVE_XINPUT2_H)
if(HAVE_X11_SHARED AND XFIXES_LIB)
@ -777,12 +778,12 @@ macro(CheckVivante)
if(SDL_VIVANTE)
check_c_source_compiles("
#include <gc_vdk.h>
int main(int argc, char** argv) {}" HAVE_VIVANTE_VDK)
int main(int argc, char** argv) { return 0; }" HAVE_VIVANTE_VDK)
check_c_source_compiles("
#define LINUX
#define EGL_API_FB
#include <EGL/eglvivante.h>
int main(int argc, char** argv) {}" HAVE_VIVANTE_EGL_FB)
int main(int argc, char** argv) { return 0; }" HAVE_VIVANTE_EGL_FB)
if(HAVE_VIVANTE_VDK OR HAVE_VIVANTE_EGL_FB)
set(HAVE_VIVANTE TRUE)
set(HAVE_SDL_VIDEO TRUE)
@ -807,7 +808,7 @@ macro(CheckGLX)
if(SDL_OPENGL)
check_c_source_compiles("
#include <GL/glx.h>
int main(int argc, char** argv) {}" HAVE_OPENGL_GLX)
int main(int argc, char** argv) { return 0; }" HAVE_OPENGL_GLX)
if(HAVE_OPENGL_GLX)
set(SDL_VIDEO_OPENGL_GLX 1)
endif()
@ -826,7 +827,7 @@ macro(CheckEGL)
#define EGL_NO_X11
#include <EGL/egl.h>
#include <EGL/eglext.h>
int main (int argc, char** argv) {}" HAVE_OPENGL_EGL)
int main (int argc, char** argv) { return 0; }" HAVE_OPENGL_EGL)
if(HAVE_OPENGL_EGL)
set(SDL_VIDEO_OPENGL_EGL 1)
endif()
@ -840,7 +841,7 @@ macro(CheckOpenGL)
check_c_source_compiles("
#include <GL/gl.h>
#include <GL/glext.h>
int main(int argc, char** argv) {}" HAVE_OPENGL)
int main(int argc, char** argv) { return 0; }" HAVE_OPENGL)
if(HAVE_OPENGL)
set(SDL_VIDEO_OPENGL 1)
set(SDL_VIDEO_RENDER_OGL 1)
@ -855,7 +856,7 @@ macro(CheckOpenGLES)
check_c_source_compiles("
#include <GLES/gl.h>
#include <GLES/glext.h>
int main (int argc, char** argv) {}" HAVE_OPENGLES_V1)
int main (int argc, char** argv) { return 0; }" HAVE_OPENGLES_V1)
if(HAVE_OPENGLES_V1)
set(HAVE_OPENGLES TRUE)
set(SDL_VIDEO_OPENGL_ES 1)
@ -864,7 +865,7 @@ macro(CheckOpenGLES)
check_c_source_compiles("
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
int main (int argc, char** argv) {}" HAVE_OPENGLES_V2)
int main (int argc, char** argv) { return 0; }" HAVE_OPENGLES_V2)
if(HAVE_OPENGLES_V2)
set(HAVE_OPENGLES TRUE)
set(SDL_VIDEO_OPENGL_ES2 1)