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darwin7.h (MATH_LIBRARY): Remove. 

gcc/ChangeLog:
        * config/darwin7.h (MATH_LIBRARY): Remove.
        (LIB_SPEC): Define.
        * config/darwin.h (MATH_LIBRARY): Define always to empty.
        (LIB_SPEC): Only define if not already defined.

libstdc++/ChangeLog:
	* linkage.m4: Remove check for libmx.
	* configure: Regenerate.

libgfortran/ChangeLog:
	* configure.ac: Remove check for libmx.
	* configure: Regenerate.

From-SVN: r83603
This commit is contained in:
Andrew Pinski 2004-06-24 17:53:07 +00:00 committed by Andrew Pinski
parent cc21f43ecc
commit d42093a1db
9 changed files with 1463 additions and 967 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2004-06-24 Andrew Pinski <apinski@apple.com>
* config/darwin7.h (MATH_LIBRARY): Remove.
(LIB_SPEC): Define.
* config/darwin.h (MATH_LIBRARY): Define always to empty.
(LIB_SPEC): Only define if not already defined.
2004-06-24 Revital Eres <eres@il.ibm.com>
* loop-iv.c (iv_analyze, simple_set_p): Support for identifying

13
gcc/config/darwin.h
View File

@ -39,13 +39,8 @@ Boston, MA 02111-1307, USA. */
#define OBJECT_FORMAT_MACHO
/* Suppress g++ attempt to link in the math library automatically.
(Some Darwin versions have a libm, but they seem to cause problems
for C++ executables.) This needs to be -lmx for Darwin 7.0 and
above. */
#ifndef MATH_LIBRARY
/* Suppress g++ attempt to link in the math library automatically. */
#define MATH_LIBRARY ""
#endif
/* We have atexit. */
@ -276,10 +271,12 @@ Boston, MA 02111-1307, USA. */
%{dylinker} %{Mach} "
/* Machine dependent libraries. */
/* Machine dependent libraries but do not redefine it if we already on 7.0 and
above as it needs to link with libmx also. */
#undef LIB_SPEC
#ifndef LIB_SPEC
#define LIB_SPEC "%{!static:-lSystem}"
#endif
/* We specify crt0.o as -lcrt0.o so that ld will search the library path. */

9
gcc/config/darwin7.h
View File

@ -22,7 +22,8 @@ Boston, MA 02111-1307, USA. */
/* Darwin 7.0 and above have C99 functions. */
#define TARGET_C99_FUNCTIONS 1
/* But for some reason they are located in libmx so have it
be included when asked for and automatically when linking
with gfortran and g++. */
#define MATH_LIBRARY "-lmx"
/* Machine dependent libraries, include libmx when compiling on Darwin 7.0
and above. */
#undef LIB_SPEC
#define LIB_SPEC "%{!static:-lSystem -lmx}"

5
libgfortran/ChangeLog
View File

@ -1,3 +1,8 @@
2004-06-24 Andrew Pinski <apinski@apple.com>
* configure.ac: Remove check for libmx.
* configure: Regenerate.
2004-06-22 Janne Blomqvist <jblomqvi@cc.hut.fi>
PR fortran/15750

172
libgfortran/configure vendored
View File

@ -969,7 +969,7 @@ esac
else
echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
fi
cd "$ac_popdir"
cd $ac_popdir
done
fi
@ -2565,7 +2565,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -2623,7 +2624,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -2739,7 +2741,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -2793,7 +2796,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -2838,7 +2842,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -2882,7 +2887,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -4023,7 +4029,7 @@ test x"$pic_mode" = xno && libtool_flags="$libtool_flags --prefer-non-pic"
case $host in
*-*-irix6*)
# Find out which ABI we are using.
echo '#line 4026 "configure"' > conftest.$ac_ext
echo '#line 4032 "configure"' > conftest.$ac_ext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>&5
ac_status=$?
@ -4165,7 +4171,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -4408,7 +4415,7 @@ fi
# Provide some information about the compiler.
echo "$as_me:4411:" \
echo "$as_me:4418:" \
"checking for Fortran 77 compiler version" >&5
ac_compiler=`set X $ac_compile; echo $2`
{ (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
@ -4454,7 +4461,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_f77_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_f77_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -4503,7 +4511,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_f77_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_f77_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -4835,7 +4844,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5005,7 +5015,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5073,7 +5084,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5257,7 +5269,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5496,7 +5509,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5564,7 +5578,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5735,7 +5750,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -5888,7 +5904,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6033,7 +6050,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6188,7 +6206,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6220,77 +6239,6 @@ else
fi
# Check for complex math functions in -lmx also
echo "$as_me:$LINENO: checking for csin in -lmx" >&5
echo $ECHO_N "checking for csin in -lmx... $ECHO_C" >&6
if test "${ac_cv_lib_mx_csin+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
ac_check_lib_save_LIBS=$LIBS
LIBS="-lmx $LIBS"
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char csin ();
int
main ()
{
csin ();
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_lib_mx_csin=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_cv_lib_mx_csin=no
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
LIBS=$ac_check_lib_save_LIBS
fi
echo "$as_me:$LINENO: result: $ac_cv_lib_mx_csin" >&5
echo "${ECHO_T}$ac_cv_lib_mx_csin" >&6
if test $ac_cv_lib_mx_csin = yes; then
need_math="no"
else
need_math="yes"
fi
# Check for library functions.
@ -6362,7 +6310,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6434,7 +6383,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6505,7 +6455,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6577,7 +6528,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6648,7 +6600,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6733,7 +6686,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6834,7 +6788,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6896,7 +6851,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -7029,7 +6985,8 @@ if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -7997,6 +7954,11 @@ esac
*) ac_INSTALL=$ac_top_builddir$INSTALL ;;
esac
if test x"$ac_file" != x-; then
{ echo "$as_me:$LINENO: creating $ac_file" >&5
echo "$as_me: creating $ac_file" >&6;}
rm -f "$ac_file"
fi
# Let's still pretend it is `configure' which instantiates (i.e., don't
# use $as_me), people would be surprised to read:
# /* config.h. Generated by config.status. */
@ -8035,12 +7997,6 @@ echo "$as_me: error: cannot find input file: $f" >&2;}
fi;;
esac
done` || { (exit 1); exit 1; }
if test x"$ac_file" != x-; then
{ echo "$as_me:$LINENO: creating $ac_file" >&5
echo "$as_me: creating $ac_file" >&6;}
rm -f "$ac_file"
fi
_ACEOF
cat >>$CONFIG_STATUS <<_ACEOF
sed "$ac_vpsub

3
libgfortran/configure.ac
View File

@ -160,9 +160,6 @@ AC_CHECK_HEADER([complex.h],[AC_DEFINE([HAVE_COMPLEX_H], [1], [complex.h exists]
# Check for complex math functions
AC_CHECK_LIB([m],[csin],[need_math="no"],[need_math="yes"])
# Check for complex math functions in -lmx also
AC_CHECK_LIB([mx],[csin],[need_math="no"],[need_math="yes"])
# Check for library functions.
AC_CHECK_FUNCS(getrusage times)

5
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,8 @@
2004-06-23 Andrew Pinski <apinski@apple.com>
* linkage.m4: Remove check for libmx.
* configure: Regenerate.
2004-06-23 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/16154

2211
libstdc++-v3/configure vendored
View File

File diff suppressed because it is too large Load Diff

5
libstdc++-v3/linkage.m4
View File

@ -380,11 +380,6 @@ AC_DEFUN([GLIBCXX_CHECK_MATH_SUPPORT], [
ac_save_LIBS="$LIBS"
LIBS="$LIBS $libm"
dnl Check libmx
AC_CHECK_LIB(mx, sqrtf, libmx="-lmx")
dnl ac_save_LIBS="$LIBS"
LIBS="$LIBS $libmx"
dnl Check to see if certain C math functions exist.
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)