+# acosf.m4 serial 1
+dnl Copyright (C) 2011 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.
+
+AC_DEFUN([gl_FUNC_ACOSF],
+[
+ AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_FUNC_ACOS])
+
+ dnl Test whether acosf() exists. Assume that acosf(), if it exists, is
+ dnl defined in the same library as acos().
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $ACOS_LIBM"
+ AC_CHECK_FUNCS([acosf])
+ LIBS="$save_LIBS"
+ if test $ac_cv_func_acosf = yes; then
+ ACOSF_LIBM="$ACOS_LIBM"
+ else
+ HAVE_ACOSF=0
+ ACOSF_LIBM="$ACOS_LIBM"
+ fi
+ AC_SUBST([ACOSF_LIBM])
+])