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authorUlrich Drepper <drepper@redhat.com>1999-10-31 18:04:47 +0000
committerUlrich Drepper <drepper@redhat.com>1999-10-31 18:04:47 +0000
commitb4cbd37109d882aa052e7973684774eaa887071b (patch)
treeac0a669e6117fae429d7271f9e5fb755d422cbb7 /manual
parent592d2832b2fd56b2f890d1c550f14578c94dc7ed (diff)
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Update.
* manual/creature.texi (Feature Test Macros): Mention _ISOC99_SOURCE.
Diffstat (limited to 'manual')
-rw-r--r--manual/creature.texi20
1 files changed, 15 insertions, 5 deletions
diff --git a/manual/creature.texi b/manual/creature.texi
index befea10..11061f9 100644
--- a/manual/creature.texi
+++ b/manual/creature.texi
@@ -26,12 +26,12 @@ functions with names that smaller ones reserve to the user program. This
is not mere pedantry --- it has been a problem in practice. For instance,
some non-GNU programs define functions named @code{getline} that have
nothing to do with this library's @code{getline}. They would not be
-compilable if all features were enabled indescriminantly.
+compilable if all features were enabled indescriminantly.
This should not be used to verify that a program conforms to a limited
standard. It is insufficent for this purpose, as it will not protect you
from including header files outside the standard, or relying on semantics
-undefined within the standard.
+undefined within the standard.
@comment (none)
@comment POSIX.1
@@ -195,10 +195,20 @@ This macro was introduced as part of the Large File Support extension
@comment (none)
@comment GNU
+@defvr Macro _ISOC99_SOURCE
+Until the revides @w{ISO C} standard is widely adopted the new features
+are not automatically enabled. The GNU libc nevertheless has a complete
+implementation of the new standard and to enable the new features the
+macro @code{_ISOC99_SOURCE} should be defined.
+@end defvr
+
+@comment (none)
+@comment GNU
@defvr Macro _GNU_SOURCE
-If you define this macro, everything is included: @w{ISO C}, POSIX.1,
-POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions. In the cases where
-POSIX.1 conflicts with BSD, the POSIX definitions take precedence.
+If you define this macro, everything is included: @w{ISO C89}, @w{ISO
+C99}, POSIX.1, POSIX.2, BSD, SVID, X/Open, LFS, and GNU extensions. In
+the cases where POSIX.1 conflicts with BSD, the POSIX definitions take
+precedence.
If you want to get the full effect of @code{_GNU_SOURCE} but make the
BSD definitions take precedence over the POSIX definitions, use this