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feature_test_macros.7: Note that man pages don't mention _XOPEN_SOURCE_EXTENDED 

As per previous commit, mention of _XOPEN_SOURCE_EXTENDED
has generally been removed from the man pages.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-02-09 11:00:19 +01:00
parent 49d2e09456
commit 1e92200fa9
1 changed files with 7 additions and 0 deletions
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7
man7/feature_test_macros.7
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@ -312,6 +312,13 @@ with a value of 500 or more also produces the same effect as defining
Use of
.BR _XOPEN_SOURCE_EXTENDED
in new source code should be avoided.
Since defining
.B _XOPEN_SOURCE
with a value of 500 or more has the same effect as defining
.BR _XOPEN_SOURCE_EXTENDED ,
the latter (obsolete) feature test macro is generally not described in the
SYNOPSIS in man pages.
.TP
.BR _ISOC99_SOURCE " (since glibc 2.1.3)"
Exposes declarations consistent with the ISO C99 standard.