AC_CHECK_LIB([m],[round],[AC_DEFINE([HAVE_ROUND],[1],[libm includes round])])
AC_CHECK_LIB([m],[roundf],[AC_DEFINE([HAVE_ROUNDF],[1],[libm includes roundf])])
AC_CHECK_LIB([m],[scalbnf],[AC_DEFINE([HAVE_SCALBNF],[1],[libm includes scalbnf])])
+AC_CHECK_LIB([m],[scalbn],[AC_DEFINE([HAVE_SCALBN],[1],[libm includes scalbn])])
AC_CHECK_LIB([m],[sinf],[AC_DEFINE([HAVE_SINF],[1],[libm includes sinf])])
AC_CHECK_LIB([m],[sinhf],[AC_DEFINE([HAVE_SINHF],[1],[libm includes sinhf])])
AC_CHECK_LIB([m],[sqrtf],[AC_DEFINE([HAVE_SQRTF],[1],[libm includes sqrtf])])