preprocessor/10865: gcc -pthread does not add -D_REENTRANT
Mon May 19 16:36:00 GMT 2003

>Number:         10865
>Category:       preprocessor
>Synopsis:       gcc -pthread does not add -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
>Release:        gcc-3.x
Linux ia64
when invoked with option -pthread, gcc-3.x does not add the pre-processor definition -D_REENTRANT, as explained in the documentation & as gcc-2.x was previously doing.

This behaviour is duplicated on the old gcc-3.0.4 on RedHat 7.2 / ia64, then on the same compiler on RedHat Advanced Server 2.1, then on gcc-3.2.3 for Debian Sarge / ia64.

Ref: <>

RedHat did not take this bug into account.
Steps to Reproduce:
1. get the attached program pthbug.c
2. compile it with gcc -v -pthread -Wall -Wstrict-prototypes pthbug.c
3. note that -D_REENTRANT is not defined


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