diff --git a/CMakeLists.txt b/CMakeLists.txt index 44e4d725e..ebc78351e 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -65,6 +65,7 @@ include(CheckCCompilerFlag) include(CheckCXXCompilerFlag) include(CheckStructHasMember) include(CMakeDependentOption) +include(CMakePushCheckState) include(FindPkgConfig) include(GNUInstallDirs) set(CMAKE_MODULE_PATH "${SDL2_SOURCE_DIR}/cmake") diff --git a/cmake/sdlchecks.cmake b/cmake/sdlchecks.cmake index e1939dc30..8b7eb03a6 100644 --- a/cmake/sdlchecks.cmake +++ b/cmake/sdlchecks.cmake @@ -30,28 +30,19 @@ macro(FindLibraryAndSONAME _LIB) endmacro() macro(CheckDLOPEN) - check_symbol_exists(dlopen "dlfcn.h" HAVE_DLOPEN) - if(NOT HAVE_DLOPEN) - check_library_exists(dl dlopen "" DLOPEN_LIB) - if(DLOPEN_LIB) + cmake_push_check_state(RESET) + check_symbol_exists(dlopen "dlfcn.h" HAVE_DLOPEN_IN_LIBC) + if(NOT HAVE_DLOPEN_IN_LIBC) + set(CMAKE_REQUIRED_LIBRARIES dl) + check_symbol_exists(dlopen "dlfcn.h" HAVE_DLOPEN_IN_LIBDL) + if(HAVE_DLOPEN_IN_LIBDL) list(APPEND EXTRA_LIBS dl) - set(_DLLIB dl) - set(HAVE_DLOPEN TRUE) endif() endif() - if(HAVE_DLOPEN) - if(_DLLIB) - set(CMAKE_REQUIRED_LIBRARIES ${_DLLIB}) - endif() - check_c_source_compiles(" - #include - int main(int argc, char **argv) { - void *handle = dlopen(\"\", RTLD_NOW); - const char *loaderror = (char *) dlerror(); - return 0; - }" HAVE_DLOPEN) - set(CMAKE_REQUIRED_LIBRARIES) + if(HAVE_DLOPEN_IN_LIBC OR HAVE_DLOPEN_IN_LIBDL) + set(HAVE_DLOPEN TRUE) endif() + cmake_pop_check_state() endmacro() macro(CheckO_CLOEXEC)