CFLAGS="$CFLAGS -fwrapv"

fi

# Disable FP optimizations that cause various errors on gcc 4.5+ or maybe 4.6+

{ $as_echo "$as_me:$LINENO: checking whether $CC supports -fexcess-precision=standard" >&5

$as_echo_n "checking whether $CC supports -fexcess-precision=standard... " >&6; }

if test "${pgac_cv_prog_cc_cflags__fexcess_precision_standard+set}" = set; then

$as_echo_n "(cached) " >&6

else

pgac_save_CFLAGS=$CFLAGS

CFLAGS="$pgac_save_CFLAGS -fexcess-precision=standard"

ac_save_c_werror_flag=$ac_c_werror_flag

ac_c_werror_flag=yes

cat >conftest.$ac_ext <<_ACEOF

/* confdefs.h. */

_ACEOF

cat confdefs.h >>conftest.$ac_ext

cat >>conftest.$ac_ext <<_ACEOF

/* end confdefs.h. */

int

main ()

{

;

return 0;

}

_ACEOF

rm -f conftest.$ac_objext

if { (ac_try="$ac_compile"

case "(($ac_try" in

*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;

*) ac_try_echo=$ac_try;;

esac

eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""

$as_echo "$ac_try_echo") >&5

(eval "$ac_compile") 2>conftest.er1

ac_status=$?

grep -v '^ *+' conftest.er1 >conftest.err

rm -f conftest.er1

cat conftest.err >&5

$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5

(exit $ac_status); } && {

test -z "$ac_c_werror_flag" ||

test ! -s conftest.err

} && test -s conftest.$ac_objext; then

pgac_cv_prog_cc_cflags__fexcess_precision_standard=yes

else

$as_echo "$as_me: failed program was:" >&5

sed 's/^/| /' conftest.$ac_ext >&5

pgac_cv_prog_cc_cflags__fexcess_precision_standard=no

fi

rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

ac_c_werror_flag=$ac_save_c_werror_flag

CFLAGS="$pgac_save_CFLAGS"

fi

{ $as_echo "$as_me:$LINENO: result: $pgac_cv_prog_cc_cflags__fexcess_precision_standard" >&5

$as_echo "$pgac_cv_prog_cc_cflags__fexcess_precision_standard" >&6; }

if test x"$pgac_cv_prog_cc_cflags__fexcess_precision_standard" = x"yes"; then

CFLAGS="$CFLAGS -fexcess-precision=standard"

fi

elif test "$ICC" = yes; then

# Intel's compiler has a bug/misoptimization in checking for

# division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS.

PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])

# Disable optimizations that assume no overflow; needed for gcc 4.3+

PGAC_PROG_CC_CFLAGS_OPT([-fwrapv])

# Disable FP optimizations that cause various errors on gcc 4.5+ or maybe 4.6+

PGAC_PROG_CC_CFLAGS_OPT([-fexcess-precision=standard])

elif test "$ICC" = yes; then

# Intel's compiler has a bug/misoptimization in checking for

# division by NAN (NaN == 0), -mp1 fixes it, so add it to the CFLAGS.