On cygwin, gfortran -fopenmp gives the warning
gfortran: unrecognized option '-pthread'
which gives a heap of failures in the testsuite.
This is set in gcc.c:
/* Adding -fopenmp should imply pthreads. This is particularly important
for targets that use different start files and suchlike. */
#ifndef GOMP_SELF_SPECS
#define GOMP_SELF_SPECS "%{fopenmp: -pthread}"
#endif
I think the fix is to override it, as is done in gcc/config/darwin.h
/* Every program on darwin links against libSystem which contains the pthread
routines, so there's no need to explicitly call out when doing threaded
work. */
#undef GOMP_SELF_SPECS
#define GOMP_SELF_SPECS ""
I'll prepare a patch at some stage.
--
Summary: gfortran -fopenmp passes unrecognised -pthread
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: billingd at gcc dot gnu dot org
ReportedBy: billingd at gcc dot gnu dot org
GCC build triplet: i686-pc-cygwin
GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26588
