home *** CD-ROM | disk | FTP | other *** search
- ## Copyright (C) 1996 Free Software Foundation, Inc.
-
- ## This program is free software; you can redistribute it and/or modify
- ## it under the terms of the GNU General Public License as published by
- ## the Free Software Foundation; either version 2, or (at your option)
- ## any later version.
-
- ## This program is distributed in the hope that it will be useful,
- ## but WITHOUT ANY WARRANTY; without even the implied warranty of
- ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ## GNU General Public License for more details.
-
- ## You should have received a copy of the GNU General Public License
- ## along with this program; if not, write to the Free Software
- ## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- ## 02111-1307, USA.
-
- ## From Jim Meyering.
-
- ## serial 1
-
- ## @defmac AC_FUNC_STRTOD
- ## @maindex FUNC_STRTOD
- ## @ovindex LIBOBJS
- ## If the @code{strtod} function is not available, or does not work
- ## correctly (like the one on SunOS 5.4), add @samp{strtod.o} to output
- ## variable @code{LIBOBJS}.
- ## @end defmac
-
- AC_DEFUN(AM_FUNC_STRTOD,
- [AC_CACHE_CHECK(for working strtod, am_cv_func_strtod,
- [AC_TRY_RUN([
- double strtod ();
- int
- main()
- {
- {
- /* Some versions of Linux strtod mis-parse strings with leading '+'. */
- char *string = " +69";
- char *term;
- double value;
- value = strtod (string, &term);
- if (value != 69 || term != (string + 4))
- exit (1);
- }
-
- {
- /* Under Solaris 2.4, strtod returns the wrong value for the
- terminating character under some conditions. */
- char *string = "NaN";
- char *term;
- strtod (string, &term);
- if (term != string && *(term - 1) == 0)
- exit (1);
- }
- exit (0);
- }
- ], am_cv_func_strtod=yes, am_cv_func_strtod=no, am_cv_func_strtod=no)])
- test $am_cv_func_strtod = no && LIBOBJS="$LIBOBJS strtod.o"
- AC_SUBST(LIBOBJS)dnl
- am_cv_func_strtod_needs_libm=no
- if test $am_cv_func_strtod = no; then
- AC_CHECK_FUNCS(pow)
- if test $ac_cv_func_pow = no; then
- AC_CHECK_LIB(m, pow, [am_cv_func_strtod_needs_libm=yes],
- [AC_MSG_WARN(can't find library containing definition of pow)])
- fi
- fi
- ])
-