-# isnanl.m4 serial 19
-dnl Copyright (C) 2007-2016 Free Software Foundation, Inc.
+# isnanl.m4 serial 20
+dnl Copyright (C) 2007-2018 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
}]])],
[gl_cv_func_isnanl_works=yes],
[gl_cv_func_isnanl_works=no],
- [gl_cv_func_isnanl_works="guessing yes"])
+ [case "$host_os" in
+ mingw*) # Guess yes on mingw, no on MSVC.
+ AC_EGREP_CPP([Known], [
+#ifdef __MINGW32__
+ Known
+#endif
+ ],
+ [gl_cv_func_isnanl_works="guessing yes"],
+ [gl_cv_func_isnanl_works="guessing no"])
+ ;;
+ *) gl_cv_func_isnanl_works="guessing yes" ;;
+ esac
+ ])
])
])