New upstream version 1.9

[debian/gzip] / m4 / isnanl.m4

diff --git a/m4/isnanl.m4 b/m4/isnanl.m4
index 9766e47201c164d51699ac8b6639c4602ea841d3..74014d63e1567061288b58541efa9f11788e3e2c 100644 (file)
--- a/m4/isnanl.m4
+++ b/m4/isnanl.m4
@@ -1,5 +1,5 @@
-# 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.
@@ -231,6 +231,18 @@ int main ()
 }]])],
         [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
+        ])
     ])
 ])