Use memfd_create() to allocate the temporary SHM backing file in memory, and set the size with posix_fallocate(), which will return an error on insufficient space vs ftruncate(), which will silently succeed and allow a SIGBUS error to occur if the unbacked memory is accessed.
Additionally, make the legacy path more robust by unlinking the temp file, so it won't persist after close, and unmapping the shared memory buffer.
(cherry picked from commit 9bdb992925)
- 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.
libdecor plugins can change the min/max window size values internally to enforce a minimum window size, and errors and crashes can result if the window size is below the internal limit.
On versions of libdecor >= 0.1.1, the minimum width and height can be queried and the minimum required window size will be enforced. The application requested window size is still respected, however, the actual window may be slightly larger than the drawable area to accommodate the required libdecor minimum size.
On version 0.1.0 of libdecor, which lacks the function to retrieve the minimum size, the internal limits are overridden before committing a frame, so that the internal limits always match the window size as a workaround, even if the window is technically smaller than the plugin would normally allow.
(cherry picked from commit 423a82cd4b)
- add DUMMY-define in case the subsystem is enabled but not available (filesystem/misc/locale)
- add missing PSP/VITA-filesystem defines
- sync the order of filesystems in SDL_config.h.cmake/in
- add option to disable locale subsystem in configure
- SDL_CLOCK_GETTIME now defaults to ON to match autotools build
- Add detection of float.h and Xdbe
- Fix detection of pthread_setname_np() (requires _GNU_SOURCE)
- Move SDL_USE_IME definition into SDL_config.h.cmake
