+2019-01-22 Keith Marshall <keith@users.osdn.me>
+
+ Incorporate user-customized <features.h> configuration.
+
+ * include/_mingw.h: Include <features.h>, or...
+ [_MINGW_FEATURES_HEADER]: ...nominated alternative header.
+ [!defined __MINGW_FEATURES__]: Provide fall-back definition.
+ (__MINGW_FEATURES_BEGIN__, __MINGW_FEATURES_ENABLE__)
+ (__MINGW_FEATURES_IGNORE__, __MINGW_FEATURES_UNSET__)
+ (__MINGW_FEATURES_END__): New macros; define them.
+
+ * tests/Makefile.in (install-mingwrt): Create <features.h> stub; this
+ is an empty file, yielding the default fall-back configuration.
+
+2019-01-21 Keith Marshall <keith@users.osdn.me>
+
+ Handle another GCC compile-time warning.
+
+ * mingwex/memalign.c (is_power_of_two): Use in-line expansion...
+ (memalign_is_power_of_two): ...of this new function; this is required
+ to avoid -Wsequence-point warnings, which may arise when testing the
+ result of an assignment expression passed as the macro argument.
+
+2019-01-11 Keith Marshall <keith@users.osdn.me>
+
+ Fix a mkstemp() file name generator defect.
+
+ * mingwex/cryptnam.c (crypto_random_filename_char): Revert 2018-09-06
+ change; argument type must be unsigned char *, to avoid math errors.
+ (__mingw_crypto_tmpname): Use explicit casts to resolve type conflicts.
+
+2019-01-11 Keith Marshall <keith@users.osdn.me>
+
+ Fix a <stdio.h> typedef omission.
+
+ * include/stdio.h: Adjust comment formatting.
+ (__need___off64_t) [__MSVCRT__]: Require it, but remove...
+ [!(__STRICT_ANSI__||__NO_MINGW_LFS)]: ...this exclusion filter.
+ [!__MSVCRT__] (__need___off32_t): Require this alternative.
+ (sys/types.h): Include unconditionally.
+
+2018-12-23 Keith Marshall <keith@users.osdn.me>
+
+ Prepare and publish MinGW.org WSL-5.2 release.
+
+ * All files (wsl-5.2-release): Tag assigned.
+
+2018-12-22 Keith Marshall <keith@users.osdn.me>
+
+ Correct an optional DLL installation and packaging defect.
+
+ * Makefile.in (optional_dll): New function macro; define it, and...
+ (MAP_LIBMINGWEX_A_DLLVERSION): ...wrap this, replacing all usage of...
+ (optional_dll_version, optional_dll_package): ...these; delete them,
+ together with all dependent references.
+
+2018-12-22 Keith Marshall <keith@users.osdn.me>
+
+ Update ANSI stdio feature test to accommodate ISO-C11.
+
+ * include/_mingw.h.in (__USE_MINGW_ANSI_STDIO): Add a deprecation
+ warning, for ill-advised direct definition in user code; include...
+ (_ISOC11_SOURCE): ...this new user defined feature test macro as a
+ further indirect enabling condition.
+
+2018-12-20 Keith Marshall <keith@users.osdn.me>
+
+ Implement test suite for aligned heap management API.
+
+ * tests/testsuite.at.in: Include...
+ * tests/memalign.at: ...this new file; it replaces...
+ * mingwex/tst-aligned-malloc.c: ...this; delete it.
+
+2018-12-20 Keith Marshall <keith@users.osdn.me>
+
+ Reimplement aligned heap management API.
+
+ * mingwex/mingw-aligned-malloc.c: Delete it; it is replaced by...
+ * mingwex/memalign.c: ...this new file; it reimplements...
+ (__mingw_aligned_offset_malloc, __mingw_aligned_offset_realloc)
+ (__mingw_aligned_free): ...each of these public API functions; also...
+ (__mingw_realloc, __mingw_free): ...adds these new public functions,...
+ (__mingw_memalign_base, __mingw_memalign_realloc): ...these private,
+ but globally exposed, supporting functions, and additionally...
+ (__mingw_memalign_lwm): ...this global, private use, variable.
+
+ * include/stdlib.h (__mingw_realloc, __mingw_free): Declare prototypes.
+
+ * include/malloc.h (__mingw_aligned_malloc, __mingw_aligned_realloc):
+ Implement them in-line; export them, via __LIBIMPL__, to libmingwex.a
+ (_aligned_malloc, __mingw_aligned_malloc, _aligned_offset_malloc)
+ (__mingw_aligned_offset_malloc): Add __MINGW_ATTRIB_MALLOC attribute.
+ [__MSVCRT_VERSION__ < __MSVCR70_DLL] (_aligned_malloc, _aligned_free)
+ (_aligned_realloc, _aligned_offset_malloc, _aligned_offset_realloc):
+ Implement them in-line, as wrappers around their MinGW alternatives;
+ export them, via __LIBIMPL__, to new library, libmemalign.a
+
+ * Makefile.in (LIBMINGWEX_MEMALIGN): New macro; define it; derive...
+ (LIBMINGWEX_MEMALIGN_OBJECTS): ...this macro; add compilation rule.
+ (libmingwex.a): Add $LIBMINGWEX_MEMALIGN_OBJECTS; they replace...
+ (mingw-aligned-malloc.$OBJEXT): ...this; remove dependency.
+ (all-mingwrt-libs, install-mingwrt-libs): Add libmemalign.a
+ (msvcrt_repl_funcs): Add alias references for...
+ (free, realloc): ...these.
+
+2018-12-04 Keith Marshall <keith@users.osdn.me>
+
+ Reimplement Win9x specific fseek()/fwrite() redirector.
+
+ * include/stdio.h [__USE_MINGW_FSEEK]: Deprecate support for direct
+ user definition; deduce it, as an internal private definition, from...
+ [_WIN32_WINDOWS]: ...this, when appropriately defined for Win9x.
+ [__USE_MINGW_FSEEK] (__mingw_fseek): Declare new prototype; map it as
+ multiple __CRT_ALIAS inline function overrides for each of...
+ (fseek, _fseeki64, fseeko64): ...these.
+ [__USE_MINGW_FSEEK] (__mingw_fwrite): Likewise, overriding...
+ (fwrite): ...this.
+ (__mingw_fseeko64): Delete all references; it is no longer provided,
+ nor required.
+
+ * mingwex/stdio/fwrite.c: New file; it reimplements the Win9x
+ fseek()/fwrite() function redirector interface, and thus replaces...
+ * mingex/ming-fseek.c: ...this; delete it.
+
+ * Makefile.in (libmingwex.a): Remove dependency on...
+ (mingw-fseek.$OBJEXT): ...this object module; replace it with...
+ (fwrite.$OBJEXT): ...this alternative dependency.
+
+2018-12-04 Keith Marshall <keith@users.osdn.me>
+
+ Implement POSIX.1-1996 linked-list queue management API.
+
+ * mingwex/insque.c mingwex/remque.c: New files; they implement the
+ POSIX.1-1996 insque(), and remque() functions, respectively.
+
+ * include/search.h (insque, remque): Declare function prototypes.
+
+ * Makefile.in (libmingwex.a): Add dependencies on...
+ (insque.$OBJEXT, remque.$OBJEXT): ...these.
+
+2018-11-25 Keith Marshall <keith@users.osdn.me>
+
+ Emulate _fseeki64()/_ftelli64() API on legacy platforms.
+
+ * mingwex/stdio/fseeki64.c: New file; it implements...
+ (__mingw_fseeki64, fseeko64): ...both of these functions, avoiding any
+ dependency on undocumented internal implementation details of...
+ (fpos_t): ...this opaque data type, and replacing...
+ * mingwex/stdio/fseeko64.c: ...this; delete it.
+
+ * mingwex/stdio/ftelli64.c: New file; it implements...
+ (_ftelli64, ftello64): ...both of these, again avoiding any dependency
+ on undocumented internal implementation details of...
+ (fpos_t): ...this opaque data type.
+
+ * include/stdio.h (fpos_t): Make it more effectively opaque.
+ (__mingw_fseeki64, __mingw_ftelli64): Declare them for legacy use.
+ [_WIN32_WINNT < VISTA && __MSVCRT_VERSION__ < MSVCR80_DLL] (_fseeki64)
+ (_ftelli64): Map inline emulations, to "__mingw" prefixed names.
+ (ftello64): Remove inline implementation.
+
+ * Makefile.in (libmingwex.a): Add references to...
+ (fseeki64.$OBJEXT, ftelli64.$OBJEXT): these; remove reference to...
+ (fseeko64.$OBJEXT): ...this.
+
+2018-10-21 Keith Marshall <keith@users.osdn.me>
+
+ Update <conio.h> and <wchar.h> header files.
+
+ * include/conio.h: Tidy layout; assert copyright.
+ [_CONIO_H_]: Rename multiple inclusion guard macro, to conform to...
+ [_CONIO_H]: ...this preferred convention; do not define when...
+ [__WCHAR_H_SOURCED__]: ...this selective inclusion condition applies.
+ [__need_wint_t, __need_wchar_t]: Define them; include <stddef.h>...
+ (wint_t, wchar_t): ...for these corresponding data type definitions.
+ [_WIN32_WINNT >= WINXP || __MSVCRT_VERSION__ >= __MSVCR70_DLL]
+ (_getwch, _getwche, _ungetwch, _putwch): Declare function prototypes.
+ [__MSVCRT_VERSION__>=__MSVCR80_DLL] (_getch_nolock, _getche_nolock)
+ (_ungetch_nolock, _putch_nolock, _getwch_nolock, _getwche_nolock)
+ (_ungetwch_nolock, _putwch_nolock): Likewise.
+ [_BEGIN_C_DECLS, _END_C_DECLS]: Use them.
+
+ * include/wchar.h: Selectively include <conio.h>, for...
+ (_getwch, _getwche, _ungetwch): ...these function prototypes, and...
+ [__MSVCRT_VERSION__>=__MSCVCR80_DLL] (_getwch_nolock)
+ (_getwche_nolock, _ungetwch_nolock): ...these.
+
+2018-10-18 Keith Marshall <keith@users.osdn.me>
+
+ Map compile-time constant references for POSIX clocks.
+
+ * include/time.h (CLOCK_REALTIME, CLOCK_MONOTONIC): Redefine, using...
+ (__MINGW_POSIX_CLOCKAPI): ...this new macro; it converts clock indices
+ to odd-valued compile-time constant pseudo-pointers, (distinguishable
+ from real pointers which are always even-valued), which may be passed
+ as clockid_t references in POSIX clock API function calls.
+
+ * mingwex/clockapi.h (struct __clockid__): Specify 4-byte alignment.
+ (__clock_api_is_valid): Change return type to "clockid_t".
+
+ * mingwex/clockapi.c (__clock_api_is_valid): Return an even-valued,
+ non-NULL, "clockid_t" reference pointer, or "NULL" if invalid; use...
+ (clock_reference): ...this new static inline function, to convert...
+ (CLOCK_REALTIME, CLOCK_MONOTONIC): ...these odd-valued pseudo-pointers
+ to their actual run-time pointer equivalents; delete their physical
+ initializations, which have now become invalid.
+
+ * mingwex/clockres.c (clock_getres)
+ * mingwex/clocktime.c (clock_gettime)
+ * mingwex/clockset.c (clock_settime): Update the "clockid_t" argument
+ to match the real pointer returned by __clock_api_is_valid()
+
2018-10-08 Keith Marshall <keith@users.osdn.me>
Suppress autoconf detection of _aligned_malloc functions.
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