ncurses 6.3 - patch 20220729

[ncurses.git] / test / aclocal.m4

diff --git a/test/aclocal.m4 b/test/aclocal.m4
index 02025f837309bde6275e0a0523fe29578dbe7b81..9a9726217c0721d4509cb9a7ad4c66aea6920e83 100644 (file)
--- a/test/aclocal.m4
+++ b/test/aclocal.m4
@@ -27,7 +27,7 @@ dnl sale, use or other dealings in this Software without prior written       *
 dnl authorization.                                                           *
 dnl***************************************************************************
 dnl
-dnl $Id: aclocal.m4,v 1.203 2022/01/23 00:22:31 tom Exp $
+dnl $Id: aclocal.m4,v 1.205 2022/07/27 23:35:25 tom Exp $
 dnl
 dnl Author: Thomas E. Dickey
 dnl
@@ -2488,7 +2488,7 @@ AC_SUBST(MAKE_UPPER_TAGS)
 AC_SUBST(MAKE_LOWER_TAGS)
 ])dnl
 dnl ---------------------------------------------------------------------------
-dnl CF_MATH_LIB version: 10 updated: 2020/12/31 18:40:20
+dnl CF_MATH_LIB version: 11 updated: 2022/07/27 19:01:48
 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
@@ -2498,18 +2498,42 @@ 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 <stdlib.h>
-       #include <math.h>
+               #include <stdio.h>
+               #include <stdlib.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,,[
-       CF_ADD_LIB(m)
-],[$1=-lm])
+
+       cf_save_LIBS="$LIBS"
+       LIBS="$LIBS -lm"
+       AC_CACHE_CHECK(if -lm is available for math functions,
+       cf_cv_have_libm,[
+       AC_TRY_LINK([
+               #include <stdio.h>
+               #include <stdlib.h>
+               #include <math.h>
+       ],
+       [double x = rand(); printf("result = %g\\n", ]ifelse([$2],,sin(x),$2)[)],
+       [cf_cv_have_libm=yes],
+       [cf_cv_have_libm=no])])
+       LIBS="$cf_save_LIBS"
+
+       if test "$cf_cv_have_libm" = yes
+       then
+               ifelse($1,,[CF_ADD_LIB(m)],[$1=-lm])
+       fi
+else
+       cf_cv_have_libm=yes
+fi
+
+if test "$cf_cv_have_libm" = yes
+then
+       AC_DEFINE(HAVE_MATH_FUNCS,1,[Define to 1 if math functions are available])
 fi
 ])
 dnl ---------------------------------------------------------------------------