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feature_test_macros.7: Note that _REENTRANT and _THREAD_SAFE are now deprecated 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2016-12-08 09:52:38 +01:00
parent 16109ab354
commit 75b554e781
1 changed files with 11 additions and 5 deletions
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16
man7/feature_test_macros.7
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@ -529,13 +529,19 @@ and
.BR _SVID_SOURCE .
.TP
.B _REENTRANT
Defining this macro exposes definitions of certain reentrant functions.
For multithreaded programs, use
.I "cc\ \-pthread"
instead.
Historically,
defining this macro exposed definitions of certain reentrant functions.
However, already for many years this macro has had few effects,
and since glibc 2.3, no effects that were not also achieved by defining
.BR _POSIX_C_SOURCE
with a value of 199606L or greater.
This macro is now deprecated; since glibc 2.25,
defining it has the same effect as defining
.BR _POSIX_C_SOURCE
with a value of 199606L or greater.
.TP
.B _THREAD_SAFE
Synonym for
Synonym for the (deprecated)
.BR _REENTRANT ,
provided for compatibility with some other implementations.
.TP