dnl Test whether floorl() is declared.
AC_CHECK_DECLS([floorl], , , [[#include <math.h>]])
if test "$ac_cv_have_decl_floorl" = yes; then
dnl Test whether floorl() is declared.
AC_CHECK_DECLS([floorl], , , [[#include <math.h>]])
if test "$ac_cv_have_decl_floorl" = yes; then