BUILD: Check for some non-standard math functions

Namely fabs, fabsf, fmin, fminf, fmax, fmaxf
lousyphreak · Mar 28, 2011 · 7d7e9e5 · 7d7e9e5
1 parent 847229c
commit 7d7e9e5
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Showing 2 changed files with 29 additions and 0 deletions.
diff --git a/config.h.in b/config.h.in
@@ -39,6 +39,24 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define to 1 if you have the `fabs' function. */
+#undef HAVE_FABS
+
+/* Define to 1 if you have the `fabsf' function. */
+#undef HAVE_FABSF
+
+/* Define to 1 if you have the `fmax' function. */
+#undef HAVE_FMAX
+
+/* Define to 1 if you have the `fmaxf' function. */
+#undef HAVE_FMAXF
+
+/* Define to 1 if you have the `fmin' function. */
+#undef HAVE_FMIN
+
+/* Define to 1 if you have the `fminf' function. */
+#undef HAVE_FMINF
+
 /* Define to 1 if you have the <GL/glu.h> header file. */
 #undef HAVE_GL_GLU_H
 
@@ -51,6 +69,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 

diff --git a/configure.ac b/configure.ac
@@ -22,6 +22,14 @@ if test "x$with_werror" = "xyes"; then
 	WERROR="-Werror"
 fi
 
+AC_CHECK_LIB([m], [cos])
+AC_CHECK_FUNCS([fabs])
+AC_CHECK_FUNCS([fmin])
+AC_CHECK_FUNCS([fmax])
+AC_CHECK_FUNCS([fabsf])
+AC_CHECK_FUNCS([fminf])
+AC_CHECK_FUNCS([fmaxf])
+
 AC_CHECK_PROG([SDL_CONFIG], [sdl-config], [sdl-config])
 
 if test -n "$SDL_CONFIG"; then