LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

feature_test_macros.7: Clarify relation between _XOPEN_SOURCE >=500 and _XOPEN_SOURCE_EXTENDED 

Emphasize that defining _XOPEN_SOURCE >=500 produces same
effects as defining  _XOPEN_SOURCE_EXTENDED.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-02-08 12:12:14 +01:00
parent e464f0546d
commit a7d7000f59
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
man7/feature_test_macros.7
View File

@ -233,15 +233,21 @@ is defined with the value 200112L.
is defined with the value 200809L.
.RE
.RE
.IP
In addition, defining
.BR _XOPEN_SOURCE
with a value of 500 or greater produces the same effects as defining
.BR _XOPEN_SOURCE_EXTENDED .
.TP
.B _XOPEN_SOURCE_EXTENDED
If this macro is defined, and
.B _XOPEN_SOURCE
is defined, then expose definitions corresponding to the XPG4v2
(SUSv1) UNIX extensions (UNIX 95).
This macro is also implicitly defined if
Defining
.B _XOPEN_SOURCE
is defined with a value of 500 or more.
with a value of 500 or more also produces the same effect as defining
.BR _XOPEN_SOURCE_EXTENDED .
.TP
.BR _ISOC99_SOURCE " (since glibc 2.1.3)"
Exposes declarations consistent with the ISO C99 standard.