On 06/08/2017 18:16, Ken Brown wrote:
On 8/6/2017 10:51 AM, Marco Atzeri wrote:
On 06/08/2017 11:44, Achim Gratz wrote:
The "-std=c*" options are not meant to expose any symbols that are not
defined in the respective C standard. You almost always want to use
"-std=gnu*" instead if you target POSIX-y systems.
formally you are right. However it seems that Cygwin is now
more stringent than Linux where this problem does not arise.
That's not what I see on Linux (Scientific Linux 7.2):
thanks Ken for the check.
I should have reported the full error
error: ‘SIG_SETMASK’ undeclared (first use in this function)
#define HDsigsetjmp(J,N) sigsetjmp(J,N)
from the macro definition in
/usr/include/machine/setjmp.h
It seems sigsetjmp is export anyway and using SIG_SETMASK
---------------------------------------------------
#ifdef __CYGWIN__
/* Per POSIX, siglongjmp has to be implemented as function. Cygwin
provides functions for both, siglongjmp and sigsetjmp since 2.2.0. */
extern void siglongjmp (sigjmp_buf, int) __attribute__ ((__noreturn__));
extern int sigsetjmp (sigjmp_buf, int);
#endif
#if defined(__GNUC__)
#define sigsetjmp(env, savemask) \
__extension__ \
({ \
sigjmp_buf *_sjbuf = &(env); \
((*_sjbuf)[_SAVEMASK] = savemask,\
__SIGMASK_FUNC (SIG_SETMASK, 0, (sigset_t *)((*_sjbuf) +
_SIGMASK)),\
setjmp (*_sjbuf)); \
})
#define siglongjmp(env, val) \
__extension__ \
({ \
sigjmp_buf *_sjbuf = &(env); \
((((*_sjbuf)[_SAVEMASK]) ? \
__SIGMASK_FUNC (SIG_SETMASK, (sigset_t *)((*_sjbuf) +
_SIGMASK), 0)\
: 0), \
longjmp (*_sjbuf, val)); \
})
#else /* !__GNUC__ */
#define sigsetjmp(env, savemask) ((env)[_SAVEMASK] = savemask,\
__SIGMASK_FUNC (SIG_SETMASK, 0, (sigset_t *) ((env) +
_SIGMASK)),\
setjmp (env))
#define siglongjmp(env, val) ((((env)[_SAVEMASK])?\
__SIGMASK_FUNC (SIG_SETMASK, (sigset_t *) ((env) +
_SIGMASK), 0):0),\
longjmp (env, val))
#endif
------------------------------------------------------
hdf5 seems wrong to use sigsetjmp and C99 but Cygwin seems to
have a consistency issue.
Regards
Marco
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
