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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2010-09-10 06:33:31 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2010-09-10 06:33:31 +0200 |
| commit | e417acb023de47daa77b45e49d7bdf5af33a3226 (patch) | |
| tree | d953f0d81cfc03886889380e121758ffdac65dbf /man7/unix.7 | |
| parent | fbea0f8160fc322fe97a02fa0fd9dc7ac568ada4 (diff) | |
| download | man-pages-e417acb023de47daa77b45e49d7bdf5af33a3226.tar.gz | |
fcntl.2, intro.2, open.2, poll.2, ftw.3, intro.3, matherr.3, system.3, tmpnam.3, unix.7: Note that feature test macros must be defined before *any* includes
Programmers often make the mistake of including a feature test
macro only after having already included some header files.
This patch adds some text at opportune places to remind
programmers to do things the right way.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/unix.7')
| -rw-r--r-- | man7/unix.7 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/man7/unix.7 b/man7/unix.7 index b891905de6..a397a9dfc8 100644 --- a/man7/unix.7 +++ b/man7/unix.7 @@ -235,7 +235,9 @@ struct ucred { Since glibc 2.8, the .B _GNU_SOURCE -feature test macro must be defined in order to obtain the definition +feature test macro must be defined (before including +.I any +header files) in order to obtain the definition of this structure. The credentials which the sender specifies are checked by the kernel. |