mirror of
git://sourceware.org/git/newlib-cygwin.git
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6ba26630e0
This is the complete rework of the feature tests macros for better compatibility with GNU libc, primarily based on the Linux man pages documentation: http://man7.org/linux/man-pages/man7/feature_test_macros.7.html The previous implementation was flawed in its approach that macros were often used to hide symbols if defined (e.g. !defined __STRICT_ANSI__ or !defined _POSIX_SOURCE), whereas the approach of glibc is that these macros make symbols available when defined (e.g. defined _BSD_SOURCE, or as used internally, #if __BSD_VISIBLE). As much open-source software is written with glibc in mind, this necessitated patching numerous packages just to compile. In particular, __STRICT_ANSI__ (which is defined by gcc -ansi or -std=c*) was given too much importance. This implementation limits the influence of __STRICT_ANSI__ to controlling the default when no other feature test macros are defined, and to the inclusion of <alloca.h> in <stdlib.h> as documented. These are the only places where __STRICT_ANSI__ should be tested. The following macros are now accepted: _ATFILE_SOURCE, _BSD_SOURCE, _DEFAULT_SOURCE, _ISOC99_SOURCE, _ISOC11_SOURCE, _LARGEFILE_SOURCE, _SVID_SOURCE, _XOPEN_SOURCE_EXTENDED. The existing __*_VISIBLE internal macros have been kept mostly compatible with the original BSD implementation, with some changes to the criteria which controls them. Several more macros in this style have been added where needed for concision or accuracy. Enabling C++11 or newer in the compiler also enables C99 and C11 functions. Doing so should help move away from the need to define _GNU_SOURCE in g++ for _GLIBCXX_USE_C99 support as on Linux: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51749 Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
288 lines
6.7 KiB
C
288 lines
6.7 KiB
C
#ifndef __SYS_CONFIG_H__
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#define __SYS_CONFIG_H__
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#include <machine/ieeefp.h> /* floating point macros */
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#include <sys/features.h> /* POSIX defs */
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#ifdef __aarch64__
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#define MALLOC_ALIGNMENT 16
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#endif
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/* exceptions first */
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#if defined(__H8500__) || defined(__W65__)
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#define __SMALL_BITFIELDS
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/* ??? This conditional is true for the h8500 and the w65, defining H8300
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in those cases probably isn't the right thing to do. */
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#define H8300 1
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#endif
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/* 16 bit integer machines */
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#if defined(__Z8001__) || defined(__Z8002__) || defined(__H8500__) || defined(__W65__) || defined (__mn10200__) || defined (__AVR__)
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX 32767
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#define UINT_MAX 65535
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#endif
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#if defined (__H8300__) || defined (__H8300H__) || defined(__H8300S__) || defined (__H8300SX__)
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#define __SMALL_BITFIELDS
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#define H8300 1
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#endif
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#if (defined(__CR16__) || defined(__CR16C__) ||defined(__CR16CP__))
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#ifndef __INT32__
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#define __SMALL_BITFIELDS
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX 32767
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#else /* INT32 */
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX 2147483647
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#endif /* INT32 */
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#endif /* CR16C */
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#if defined (__xc16x__) || defined (__xc16xL__) || defined (__xc16xS__)
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#define __SMALL_BITFIELDS
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#endif
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#ifdef __W65__
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#define __SMALL_BITFIELDS
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#endif
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#if defined(__D10V__)
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#define __SMALL_BITFIELDS
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#define _POINTER_INT short
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#endif
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#if defined(__mc68hc11__) || defined(__mc68hc12__) || defined(__mc68hc1x__)
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#define _POINTER_INT short
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#endif
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#if defined(__m68k__) || defined(__mc68000__)
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#define _READ_WRITE_RETURN_TYPE _ssize_t
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#endif
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#ifdef ___AM29K__
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#define _FLOAT_RET double
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#endif
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#ifdef __i386__
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#ifndef __unix__
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/* in other words, go32 */
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#define _FLOAT_RET double
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#endif
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#if defined(__linux__) || defined(__RDOS__)
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/* we want the reentrancy structure to be returned by a function */
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#define __DYNAMIC_REENT__
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#define HAVE_GETDATE
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#define _HAVE_SYSTYPES
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#define _READ_WRITE_RETURN_TYPE _ssize_t
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#define __LARGE64_FILES 1
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/* we use some glibc header files so turn on glibc large file feature */
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#define _LARGEFILE64_SOURCE 1
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#endif
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#endif
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#ifdef __mn10200__
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#define __SMALL_BITFIELDS
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#endif
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#ifdef __AVR__
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#define __SMALL_BITFIELDS
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#define _POINTER_INT short
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#endif
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#ifdef __v850
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#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__sda__))
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#endif
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/* For the PowerPC eabi, force the _impure_ptr to be in .sdata */
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#if defined(__PPC__)
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#if defined(_CALL_SYSV)
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#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__section__(".sdata")))
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#endif
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#ifdef __SPE__
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#define _LONG_DOUBLE double
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#endif
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#endif
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/* Configure small REENT structure for Xilinx MicroBlaze platforms */
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#if defined (__MICROBLAZE__)
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#ifndef _REENT_SMALL
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#define _REENT_SMALL
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#endif
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/* Xilinx XMK uses Unix98 mutex */
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#ifdef __XMK__
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#define _UNIX98_THREAD_MUTEX_ATTRIBUTES
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#endif
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#endif
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#if defined(__mips__) && !defined(__rtems__)
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#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__section__(".sdata")))
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#endif
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#ifdef __xstormy16__
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#define __SMALL_BITFIELDS
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#define MALLOC_ALIGNMENT 8
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#define _POINTER_INT short
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#define __BUFSIZ__ 16
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#define _REENT_SMALL
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#endif
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#if defined __MSP430__
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#ifndef _REENT_SMALL
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#define _REENT_SMALL
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#endif
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#define __SMALL_BITFIELDS
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#ifdef __MSP430X_LARGE__
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#define _POINTER_INT long
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#else
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#define _POINTER_INT int
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#endif
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#endif
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#ifdef __m32c__
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#define __SMALL_BITFIELDS
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#undef INT_MAX
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#undef UINT_MAX
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#define INT_MAX __INT_MAX__
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#define UINT_MAX (__INT_MAX__ * 2U + 1)
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#define MALLOC_ALIGNMENT 8
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#if defined(__r8c_cpu__) || defined(__m16c_cpu__)
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#define _POINTER_INT short
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#else
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#define _POINTER_INT long
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#endif
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#define __BUFSIZ__ 16
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#define _REENT_SMALL
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#endif /* __m32c__ */
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#ifdef __SPU__
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#define MALLOC_ALIGNMENT 16
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#define __CUSTOM_FILE_IO__
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#endif
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#if defined(__or1k__) || defined(__or1knd__)
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#define __DYNAMIC_REENT__
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#endif
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/* This block should be kept in sync with GCC's limits.h. The point
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of having these definitions here is to not include limits.h, which
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would pollute the user namespace, while still using types of the
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the correct widths when deciding how to define __int32_t and
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__int64_t. */
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#ifndef __INT_MAX__
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# ifdef INT_MAX
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# define __INT_MAX__ INT_MAX
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# else
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# define __INT_MAX__ 2147483647
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# endif
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#endif
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#ifndef __LONG_MAX__
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# ifdef LONG_MAX
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# define __LONG_MAX__ LONG_MAX
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# else
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# if defined (__alpha__) || (defined (__sparc__) && defined(__arch64__)) \
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|| defined (__sparcv9)
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# define __LONG_MAX__ 9223372036854775807L
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# else
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# define __LONG_MAX__ 2147483647L
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# endif /* __alpha__ || sparc64 */
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# endif
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#endif
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/* End of block that should be kept in sync with GCC's limits.h. */
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#ifndef _POINTER_INT
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#define _POINTER_INT long
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#endif
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#ifdef __frv__
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#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__section__(".sdata")))
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#endif
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#undef __RAND_MAX
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#if __INT_MAX__ == 32767
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#define __RAND_MAX 32767
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#else
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#define __RAND_MAX 0x7fffffff
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#endif
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#if defined(__CYGWIN__)
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#include <cygwin/config.h>
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#endif
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#if defined(__rtems__)
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#define __FILENAME_MAX__ 255
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#define _READ_WRITE_RETURN_TYPE _ssize_t
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#define __DYNAMIC_REENT__
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#define _REENT_GLOBAL_ATEXIT
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#endif
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#ifndef __EXPORT
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#define __EXPORT
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#endif
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#ifndef __IMPORT
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#define __IMPORT
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#endif
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/* Define return type of read/write routines. In POSIX, the return type
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for read()/write() is "ssize_t" but legacy newlib code has been using
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"int" for some time. If not specified, "int" is defaulted. */
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#ifndef _READ_WRITE_RETURN_TYPE
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#define _READ_WRITE_RETURN_TYPE int
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#endif
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/* Define `count' parameter of read/write routines. In POSIX, the `count'
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parameter is "size_t" but legacy newlib code has been using "int" for some
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time. If not specified, "int" is defaulted. */
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#ifndef _READ_WRITE_BUFSIZE_TYPE
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#define _READ_WRITE_BUFSIZE_TYPE int
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#endif
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#ifndef __WCHAR_MAX__
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#if __INT_MAX__ == 32767 || defined (_WIN32)
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#define __WCHAR_MAX__ 0xffffu
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#endif
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#endif
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/* See if small reent asked for at configuration time and
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is not chosen by the platform by default. */
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#ifdef _WANT_REENT_SMALL
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#ifndef _REENT_SMALL
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#define _REENT_SMALL
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#endif
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#endif
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/* If _MB_EXTENDED_CHARSETS_ALL is set, we want all of the extended
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charsets. The extended charsets add a few functions and a couple
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of tables of a few K each. */
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#ifdef _MB_EXTENDED_CHARSETS_ALL
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#define _MB_EXTENDED_CHARSETS_ISO 1
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#define _MB_EXTENDED_CHARSETS_WINDOWS 1
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#endif
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#endif /* __SYS_CONFIG_H__ */
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