])
AC_HEADER_STDC
-AC_CHECK_HEADERS(errno.h)
-AC_CHECK_HEADERS(math.h limits.h float.h stdarg.h ctype.h)
AC_CHECK_HEADERS(netdb.h)
-AC_CHECK_FUNCS(umask isascii fork,,)
+AC_CHECK_FUNCS(umask fork,,)
+AC_DEFINE([HAVE_STRINGS_H], 1, [Hard-code for src/cfg/.]
+AC_DEFINE([HAVE_FLOAT_H], 1, [Hard-code for src/cfg/.]
+AC_DEFINE([HAVE_LIMITS_H], 1, [Hard-code for src/cfg/.]
+AC_DEFINE([HAVE_MATH_H], 1, [Hard-code for src/cfg/.]
+AC_DEFINE([HAVE_CTYPE_H], 1, [Hard-code for src/cfg/.]
+AC_DEFINE([HAVE_ERRNO_H], 1, [Hard-code for src/cfg/.]
# No fork on MinGW, disable some self-tests until we fix them.
AM_CONDITIONAL(HAVE_FORK, test "$ac_cv_func_fork" != "no")