+
+# Determines the libraries needed to get the ceilf() function.
+# Sets CEILF_LIBM.
+AC_DEFUN([gl_FUNC_CEILF_LIBS],
+[
+ gl_CACHE_VAL_SILENT([gl_cv_func_ceilf_libm], [
+ gl_cv_func_ceilf_libm=?
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ float x;]],
+ [[x = ceilf(x);]])],
+ [gl_cv_func_ceilf_libm=])
+ if test "$gl_cv_func_ceilf_libm" = "?"; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ float x;]],
+ [[x = ceilf(x);]])],
+ [gl_cv_func_ceilf_libm="-lm"])
+ LIBS="$save_LIBS"
+ fi
+ ])
+ CEILF_LIBM="$gl_cv_func_ceilf_libm"
+])