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Define _POSIX_VERSION correctly when older POSIX versions are selected.
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2009-08-23 Ulrich Drepper <drepper@redhat.com>
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* posix/unistd.h: Define _POSIX_VERSION correctly if older POSIX
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versions are selected.
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* stdio-common/printf_fp.c: ISO C expects to print the sign of NaN
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as well.
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* stdio-common/printf_fphex.c: Likewise.
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@ -30,8 +30,22 @@ __BEGIN_DECLS
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/* These may be used to determine what facilities are present at compile time.
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Their values can be obtained at run time from `sysconf'. */
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#ifdef __USE_XOPEN2K8
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/* POSIX Standard approved as ISO/IEC 9945-1 as of September 2008. */
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#define _POSIX_VERSION 200809L
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# define _POSIX_VERSION 200809L
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#elif defined __USE_XOPEN2K
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/* POSIX Standard approved as ISO/IEC 9945-1 as of December 2001. */
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# define _POSIX_VERSION 200112L
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#elif defined __USE_POSIX199506
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/* POSIX Standard approved as ISO/IEC 9945-1 as of June 1995. */
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# define _POSIX_VERSION 199506L
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#elif defined __USE_POSIX199309
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/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1993. */
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# define _POSIX_VERSION 199309L
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#else
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/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1990. */
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# define _POSIX_VERSION 199009L
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#endif
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/* These are not #ifdef __USE_POSIX2 because they are
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in the theoretically application-owned namespace. */
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