AC_CHECK_DECLS([roundl], , , [#include <math.h>])
if test "$ac_cv_have_decl_roundl" = yes; then
gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);])
AC_CHECK_DECLS([roundl], , , [#include <math.h>])
if test "$ac_cv_have_decl_roundl" = yes; then
gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);])