diff options
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 75eb6563..8c37b543 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1,4 +1,4 @@ -dnl $LynxId: aclocal.m4,v 1.161 2010/06/19 11:04:07 tom Exp $ +dnl $LynxId: aclocal.m4,v 1.162 2010/06/19 17:08:42 tom Exp $ dnl Macros for auto-configure script. dnl by T.E.Dickey <dickey@invisible-island.net> dnl and Jim Spath <jspath@mail.bcpl.lib.md.us> @@ -3254,6 +3254,30 @@ AC_MSG_RESULT($cf_cv_locale) test $cf_cv_locale = yes && { ifelse($1,,AC_DEFINE(LOCALE),[$1]) } ])dnl dnl --------------------------------------------------------------------------- +dnl CF_MATH_LIB version: 6 updated: 2009/12/19 13:46:49 +dnl ----------- +dnl Checks for libraries. At least one UNIX system, Apple Macintosh +dnl Rhapsody 5.5, does not have -lm. We cannot use the simpler +dnl AC_CHECK_LIB(m,sin), because that fails for C++. +AC_DEFUN([CF_MATH_LIB], +[ +AC_CACHE_CHECK(if -lm needed for math functions, + cf_cv_need_libm,[ + AC_TRY_LINK([ + #include <stdio.h> + #include <math.h> + ], + [double x = rand(); printf("result = %g\n", ]ifelse($2,,sin(x),$2)[)], + [cf_cv_need_libm=no], + [cf_cv_need_libm=yes])]) +if test "$cf_cv_need_libm" = yes +then +ifelse($1,,[ + LIBS="-lm $LIBS" +],[$1=-lm]) +fi +]) +dnl --------------------------------------------------------------------------- dnl CF_MSG_LOG version: 4 updated: 2007/07/29 09:55:12 dnl ---------- dnl Write a debug message to config.log, along with the line number in the |