[Patch, libfortran] PR 47491 GETLOG thread-safety breaks Solaris bootstrap

[Janne Blomqvist]

Hi,

Rainer Orth reported that my recent patch to make the GETLOG intrinsic
thread-safe by using getpwuid_r() broke bootstrap on Solaris. The
reason is that Solaris has both the POSIX version and an older
pre-standard version with a different signature. By default the old
pre-standard version is used unless

#if (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_POSIX_PTHREAD_SEMANTICS)

The attached patch hopefully fixes this issue by calling the
AC_USE_SYSTEM_EXTENSIONS macro which should set
_POSIX_PTHREAD_SEMANTICS on Solaris.

Regtested on x86_64-unknown-linux-gnu, Ok for trunk?

2011-01-27  Janne Blomqvist  <jb@gcc.gnu.org>

	PR libfortran/47491
	* configure.ac: Call AC_USE_SYSTEM_EXTENSIONS to enable common
	extensions.
	* config.h.in: Regenerate.
	* configure: Regenerate.


-- 
Janne Blomqvist
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