preprocessor/10866: gcc -pthread does not define -D_REENTRANT

[francois-xavier.kowalski@hp.com]

>Number:         10866
>Category:       preprocessor
>Synopsis:       gcc -pthread does not define -D_REENTRANT
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 19 15:36:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     francois-xavier.kowalski@hp.com
>Release:        gcc-3.x for ia64
>Organization:
>Environment:
Linux ia64. RedHat-7.2, RHAS-2.1, Debian Sarge
>Description:
gcc's documented "-pthread" option does not set the -D_REENTRANT pre-processor flag.

the link flag -lpthread is correctly set.

"-pthread" is supposed to be a front-end to any needed options / libraries needed in order to build a multi-thread program.  This includes pre-processing, compilation & link.

Bug reported to RedHat <http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=84589>
>How-To-Repeat:
Steps to Reproduce:
1. get the attached program pthbug.c
2. compile it with gcc3 -v -pthread -Wall -Wstrict-prototypes pthbug.c
3. note that -D_REENTRANT is not defined
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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