Commit c3b13346e0a2200f1521cf064b9a602c8196e6a6
2022-10-21T18:32:53
On x86, pass -nodefaultlib to linker when wanting to avoid the C library
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diff --git a/CMakeLists.txt b/CMakeLists.txt
index cf86675..c1c9e91 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,6 +72,7 @@ include(GNUInstallDirs)
list(APPEND CMAKE_MODULE_PATH "${SDL2_SOURCE_DIR}/cmake")
include(${SDL2_SOURCE_DIR}/cmake/macros.cmake)
include(${SDL2_SOURCE_DIR}/cmake/sdlchecks.cmake)
+include(${SDL2_SOURCE_DIR}/cmake/CheckCPUArchitecture.cmake)
# Enable large file support on 32-bit glibc, so that we can access files
# with large inode numbers
@@ -3229,6 +3230,13 @@ if(SDL_SHARED)
# alias target for in-tree builds
add_library(SDL2::SDL2 ALIAS SDL2)
set_target_properties(SDL2 PROPERTIES POSITION_INDEPENDENT_CODE TRUE)
+ if(NOT SDL_LIBC)
+ check_cpu_architecture(x86 HAS_X86)
+ if(HAS_X86)
+ # FIXME: should be added for all architectures (missing symbols for ARM)
+ target_link_libraries(SDL2 PRIVATE "-nodefaultlib:MSVCRT")
+ endif()
+ endif()
if(APPLE)
# FIXME: Remove SOVERSION in SDL3
set_target_properties(SDL2 PROPERTIES
diff --git a/cmake/CheckCPUArchitecture.cmake b/cmake/CheckCPUArchitecture.cmake
new file mode 100644
index 0000000..79639f1
--- /dev/null
+++ b/cmake/CheckCPUArchitecture.cmake
@@ -0,0 +1,40 @@
+include(CheckCSourceCompiles)
+include(CMakePushCheckState)
+
+function(_internal_check_cpu_architecture macro_check NAME VARIABLE)
+ cmake_push_check_state(RESET)
+ string(TOUPPER "${NAME}" UPPER_NAME)
+ set(CACHE_VARIABLE "CHECK_CPU_ARCHITECTURE_${UPPER_NAME}")
+ set(test_src "
+int main(int argc, char *argv[]) {
+#if ${macro_check}
+ return 0;
+#else
+ choke
+#endif
+}
+")
+ check_c_source_compiles("${test_src}" "${CACHE_VARIABLE}")
+ cmake_pop_check_state()
+ if(${CACHE_VARIABLE})
+ set(${VARIABLE} "TRUE" PARENT_SCOPE)
+ else()
+ set(${VARIABLE} "FALSE" PARENT_SCOPE)
+ endif()
+endfunction()
+
+function(check_cpu_architecture ARCH VARIABLE)
+ if(ARCH STREQUAL "x86")
+ _internal_check_cpu_architecture("defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__) ||defined( __i386) || defined(_M_IX86)" x86 ${VARIABLE})
+ elseif(ARCH STREQUAL "x64")
+ _internal_check_cpu_architecture("defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)" x64 ${VARIABLE})
+ elseif(ARCH STREQUAL "arm32")
+ _internal_check_cpu_architecture("defined(__arm__) || defined(_M_ARM)" arm32 ${VARIABLE})
+ elseif(ARCH STREQUAL "arm64")
+ _internal_check_cpu_architecture("defined(__aarch64__) || defined(_M_ARM64)" arm64 ${VARIABLE})
+ else()
+ message(WARNING "Unknown CPU architectures (${ARCH}).")
+ set(${VARIABLE} FALSE)
+ endif()
+ set("${VARIABLE}" "${${VARIABLE}}" PARENT_SCOPE)
+endfunction()
diff --git a/src/stdlib/SDL_mslibc.c b/src/stdlib/SDL_mslibc.c
index 02eeb0f..8f92463 100644
--- a/src/stdlib/SDL_mslibc.c
+++ b/src/stdlib/SDL_mslibc.c
@@ -126,6 +126,12 @@ _ftol2_sse()
_ftol();
}
+void
+_ftol2()
+{
+ _ftol();
+}
+
/* 64-bit math operators for 32-bit systems */
void
__declspec(naked)