* acinclude.m4 (LIBGFOR_CHECK_FPSETMASK): New check.
* configure.ac: Check for floatingpoint.h, fptrap.h and float.h
headers. Use LIBGFOR_CHECK_FPSETMASK. Check for fp_trap and
fp_enable functions.
* configure.host: Add case for systems with fpsetmask and systems
with fp_trap/fp_enable.
* config/fpu-sysv.h: New file, FPU code using fpsetmask.
* config/fpu-aix.h: New file, FPU code for AIX using fp_trap and
fp_enable.
* aclocal.m4: Regenerate.
* configure: Regenerate.
* config.h.in: Regenerate.
From-SVN: r105956
