Hello David, * Dr. David Kirkby wrote on Tue, Oct 12, 2010 at 09:53:46PM CEST: > I'm trying to sort out why the latest version of the GNU Scientific Library (GSL) > does not build properly on some AIX systems (the developers are aware of it). > > I need to check if 'fprnd_t' is defined in float.h or not. > > Is there any particular trick needed to check for things in float.h? > The *only* change I've made is this single line in configure.ac > > AC_CHECK_DECLS([fprnd_t],[],[],[[#include <float.h>]]) > > But after running will always cause the generated configure script > to fail to execute properly - see below. Notice it does not find > 'fprnd_t', (on the second line) but then later generates an error. [...] Can you send 'diff -u' of the two configure files (without above line and with)? Of even of the one with float.h and the one with math.h? > Conversely, if I change it to > > AC_CHECK_DECLS([fprnd_t],[],[],[[#include <math.h>]]) > > then the configure script works. But checking in math.h is not a lot > of use when I want to check in float.h If that line really is the cause of the issues you're seeing (rather than some other circumstance), then the diff should provide a strong hint. Thanks, Ralf _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
