On 06/08/2017 11:44, Achim Gratz wrote:
Marco Atzeri writes:
building again hdf5-1.8.18 on latest cygwin I hit
error: ‘SIG_SETMASK’ undeclared
removing "-std=c99" from CFLAGS solves the issue.
https://stackoverflow.com/questions/20849917/invalid-signal-processing-library-in-linux
That is not very informative as signal.h is in C99.
http://www.open-std.org/jtc1/sc22/WG14/www/docs/n1256.pdf
however SIG_SETMASK is not
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html
As before the "-std=c99" was not causing any problem , it is not clear
to me if the current behavior is correct or a side effect of latest
cygwin header reshuffle.
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.
Regards,
Achim.
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
