- check libiconv with a linkage test with iconv.h included
- check libc iconv with a linkage test with iconv.h included
and LIBICONV_PLUG defined (in case libiconv header is in
include path)
- add new configuration option to prefer iconv from libiconv,
if available, over the libc version, defaults to disabled:
SDL_LIBICONV for cmake, --enable-libiconv for autotools.
- change FreeBSD specific LIBICONV_PLUG define in SDL_iconv.c
to configuration result.
This fixes the following errors when a dll attempts to link to a shared SDL2::SDL2:
m.c.obj : error LNK2019: unresolved external symbol __imp___acrt_iob_func referenced in function printf
m.c.obj : error LNK2019: unresolved external symbol __imp___stdio_common_vfprintf referenced in function _vfprintf_l
MSVCRTD.lib(init.obj) : error LNK2019: unresolved external symbol _CrtDbgReport referenced in function _CRT_RTC_INIT
MSVCRTD.lib(init.obj) : error LNK2019: unresolved external symbol _CrtDbgReportW referenced in function _CRT_RTC_INITW
MSVCRTD.lib(error.obj) : error LNK2019: unresolved external symbol strcpy_s referenced in function "void __cdecl _RTC_StackFailure(void *,char const *)" (?_RTC_StackFailure@@YAXPEAXPEBD@Z)
MSVCRTD.lib(error.obj) : error LNK2019: unresolved external symbol strcat_s referenced in function "void __cdecl _RTC_StackFailure(void *,char const *)" (?_RTC_StackFailure@@YAXPEAXPEBD@Z)
MSVCRTD.lib(error.obj) : error LNK2019: unresolved external symbol __stdio_common_vsprintf_s referenced in function _vsprintf_s_l
MSVCRTD.lib(error.obj) : error LNK2001: unresolved external symbol __C_specific_handler_noexcept
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol _wmakepath_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z)
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol _wsplitpath_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z)
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol wcscpy_s referenced in function "int __cdecl GetPdbDllPathFromFilePath(wchar_t const *,wchar_t *,unsigned __int64)" (?GetPdbDllPathFromFilePath@@YAHPEB_WPEA_W_K@Z)
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol __vcrt_GetModuleFileNameW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol __vcrt_GetModuleHandleW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)
MSVCRTD.lib(pdblkup.obj) : error LNK2019: unresolved external symbol __vcrt_LoadLibraryExW referenced in function "struct HINSTANCE__ * __cdecl GetPdbDll(void)" (?GetPdbDll@@YAPEAUHINSTANCE__@@XZ)
This fixes the following warning when configuring with CMake 3.27+:
```
CMake Deprecation Warning at CMakeLists.txt:3190 (cmake_minimum_required):
Compatibility with CMake < 3.5 will be removed from a future version of
CMake.
Update the VERSION argument <min> value or use a ...<max> suffix to tell
CMake that the project does not need compatibility with older versions.
```
The /Gs argument controls the number of bytes that local variables
can occupy before a stack probe is initiated.
By setting it to a huge value, no calls to __chkstk are inserted.
This change is needed for the classic Intel C compiler to build SDL
with -DSDL_LIBC=OFF.
