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-rw-r--r--m4/check-math-lib.m45
1 files changed, 3 insertions, 2 deletions
diff --git a/m4/check-math-lib.m4 b/m4/check-math-lib.m4
index 0b77d8f6a0..4f370eb49f 100644
--- a/m4/check-math-lib.m4
+++ b/m4/check-math-lib.m4
@@ -1,10 +1,10 @@
-# check-math-lib.m4 serial 3
+# check-math-lib.m4 serial 4
dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl
-dnl gl_CHECK_MATH_LIB (VARIABLE, EXPRESSION)
+dnl gl_CHECK_MATH_LIB (VARIABLE, EXPRESSION [, EXTRA-CODE])
dnl
dnl Sets the shell VARIABLE according to the libraries needed by EXPRESSION
dnl to compile and link: to the empty string if no extra libraries are needed,
@@ -22,6 +22,7 @@ AC_DEFUN([gl_CHECK_MATH_LIB], [
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ $3
double x;]],
[$2])],
[$1=$libm