missed commit

[gnulib.git] / m4 / mathfunc.m4

diff --git a/m4/mathfunc.m4 b/m4/mathfunc.m4
index 5e79d45..531fd8e 100644 (file)
--- a/m4/mathfunc.m4
+++ b/m4/mathfunc.m4
@@ -1,4 +1,4 @@
-# mathfunc.m4 serial 2
+# mathfunc.m4 serial 6
 dnl Copyright (C) 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -17,19 +17,23 @@ AC_DEFUN([gl_MATHFUNC],
   dnl are inlined by the compiler, therefore linking of these calls does not
   dnl require -lm, but taking the function pointer of 'fabs' does.
   m4_pushdef([func], [$1])
-  m4_pushdef([FUNC], [translit([$1],[abcdefghijklmnopqrstuvwxyz],
-                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
+  m4_pushdef([FUNC], [m4_translit([$1],[abcdefghijklmnopqrstuvwxyz],
+                                       [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
   FUNC[]_LIBM=
   AC_CACHE_CHECK([whether func() can be used without linking with libm],
     [gl_cv_func_]func[_no_libm],
     [
       AC_LINK_IFELSE(
-        [AC_LANG_PROGRAM([[#ifndef __NO_MATH_INLINES
-                           # define __NO_MATH_INLINES 1 /* for glibc */
-                           #endif
-                           #include <math.h>
-                           $2 (*funcptr) $3 = ]func[;]],
-                         [[return 0;]])],
+        [AC_LANG_PROGRAM(
+           [[#ifndef __NO_MATH_INLINES
+             # define __NO_MATH_INLINES 1 /* for glibc */
+             #endif
+             #include <math.h>
+             $2 (*funcptr) $3 = ]func[;
+             double d_ret;]],
+           [[$2 y = funcptr ]m4_bpatsubst([m4_bpatsubst([m4_bpatsubst([$3], [int], [2])], [double \*], [&d_ret])], [double], [1.6180339887])[;
+             return y < 0.3 || y > 1.7;
+           ]])],
         [gl_cv_func_]func[_no_libm=yes],
         [gl_cv_func_]func[_no_libm=no])
     ])
@@ -40,12 +44,16 @@ AC_DEFUN([gl_MATHFUNC],
         save_LIBS="$LIBS"
         LIBS="$LIBS -lm"
         AC_LINK_IFELSE(
-          [AC_LANG_PROGRAM([[#ifndef __NO_MATH_INLINES
-                             # define __NO_MATH_INLINES 1 /* for glibc */
-                             #endif
-                             #include <math.h>
-                             $2 (*funcptr) $3 = ]func[;]],
-                           [[return 0;]])],
+          [AC_LANG_PROGRAM(
+             [[#ifndef __NO_MATH_INLINES
+               # define __NO_MATH_INLINES 1 /* for glibc */
+               #endif
+               #include <math.h>
+               $2 (*funcptr) $3 = ]func[;
+               double d_ret;]],
+             [[$2 y = funcptr ]m4_bpatsubst([m4_bpatsubst([m4_bpatsubst([$3], [int], [2])], [double \*], [&d_ret])], [double], [1.6180339887])[;
+               return y < 0.3 || y > 1.7;
+             ]])],
           [gl_cv_func_]func[_in_libm=yes],
           [gl_cv_func_]func[_in_libm=no])
         LIBS="$save_LIBS"
@@ -58,3 +66,57 @@ AC_DEFUN([gl_MATHFUNC],
   m4_popdef([FUNC])
   m4_popdef([func])
 ])
+
+# gl_COMMON_DOUBLE_MATHFUNC(FUNC)
+# -------------------------------
+# tests whether the function FUNC is available in libc or libm.
+# It sets FUNC_LIBM to empty or "-lm" accordingly.
+# FUNC must be one of the following functions, that are present on all systems
+# and provided by libm on all systems except MacOS X, BeOS, Haiku:
+#   acos asin atan atan2 cbrt cos cosh erf erfc exp fmod hypot j0 j1 jn lgamma
+#   log log10 log1p pow remainder sin sinh sqrt tan tanh y0 y1 yn
+
+AC_DEFUN([gl_COMMON_DOUBLE_MATHFUNC],
+[
+  AC_REQUIRE([gl_COMMON_DOUBLE_MATHFUNC_TEST])
+  m4_pushdef([FUNC], [m4_translit([$1],[abcdefghijklmnopqrstuvwxyz],
+                                       [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
+  FUNC[]_LIBM="$POW_LIBM"
+  AC_SUBST(FUNC[_LIBM])
+  m4_popdef([FUNC])
+])
+
+AC_DEFUN([gl_COMMON_DOUBLE_MATHFUNC_TEST],
+[
+  dnl We could use any of the following:
+  dnl gl_MATHFUNC([acos], [double], [(double)])
+  dnl gl_MATHFUNC([asin], [double], [(double)])
+  dnl gl_MATHFUNC([atan], [double], [(double)])
+  dnl gl_MATHFUNC([atan2], [double], [(double, double)])
+  dnl gl_MATHFUNC([cbrt], [double], [(double)])
+  dnl gl_MATHFUNC([cos], [double], [(double)])
+  dnl gl_MATHFUNC([cosh], [double], [(double)])
+  dnl gl_MATHFUNC([erf], [double], [(double)])
+  dnl gl_MATHFUNC([erfc], [double], [(double)])
+  dnl gl_MATHFUNC([exp], [double], [(double)])
+  dnl gl_MATHFUNC([fmod], [double], [(double, double)])
+  dnl gl_MATHFUNC([hypot], [double], [(double, double)])
+  dnl gl_MATHFUNC([j0], [double], [(double)])
+  dnl gl_MATHFUNC([j1], [double], [(double)])
+  dnl gl_MATHFUNC([jn], [double], [(int, double)])
+  dnl gl_MATHFUNC([lgamma], [double], [(double)])
+  dnl gl_MATHFUNC([log], [double], [(double)])
+  dnl gl_MATHFUNC([log10], [double], [(double)])
+  dnl gl_MATHFUNC([log1p], [double], [(double)])
+  dnl gl_MATHFUNC([pow], [double], [(double, double)])
+  dnl gl_MATHFUNC([remainder], [double], [(double, double)])
+  dnl gl_MATHFUNC([sin], [double], [(double)])
+  dnl gl_MATHFUNC([sinh], [double], [(double)])
+  dnl gl_MATHFUNC([sqrt], [double], [(double)])
+  dnl gl_MATHFUNC([tan], [double], [(double)])
+  dnl gl_MATHFUNC([tanh], [double], [(double)])
+  dnl gl_MATHFUNC([y0], [double], [(double)])
+  dnl gl_MATHFUNC([y1], [double], [(double)])
+  dnl gl_MATHFUNC([yn], [double], [(int, double)])
+  gl_MATHFUNC([pow], [double], [(double, double)])
+])