This patch includes

   * mingw-w64-headers/include/winnt.h: compile fixes for1 gcc-4.9.3
   * mingw-w64-headers/crt/math.h: Likewise
   * mingw-w64-headers/crt/float.h (FLT_EPSILON,DBL_EPSILON,LDBL_EPSILON): Add
   symbols.
   * mingw-w64-headers/crt/stat.h (S_ISLNK,S_ISSOCK,S_ISUID,S_ISGID,S_ISLINK):
   Add symbols.
   (lstat): Add function.
   * mingw-w64-headers/crt/_mingw_stat64.h: Likewise
   * mingw-w64-headers/crt/stdlib.h (realpath): Add function.

Needed for building with gcc-4.9.3 and using with cross-libtool-2.4.6.

Upstream status: not yet presented upstream.

diff --git a/mingw-w64-headers/crt/float.h b/mingw-w64-headers/crt/float.h
index 5874f4e..bdf4ead 100644
--- a/mingw-w64-headers/crt/float.h
+++ b/mingw-w64-headers/crt/float.h
@@ -22,6 +22,15 @@
 #if (__GNUC__ < 4)
 #error Corrupt install of gcc-s internal headers, or search order was changed.
 #else
+
+        /* From gcc-4.9.3 float.h.  */
+        #undef FLT_EPSILON
+        #undef DBL_EPSILON
+        #undef LDBL_EPSILON
+        #define FLT_EPSILON	__FLT_EPSILON__
+        #define DBL_EPSILON	__DBL_EPSILON__
+        #define LDBL_EPSILON	__LDBL_EPSILON__
+
 	/* #include_next <float_ginclude.h> */

    	/* Number of decimal digits, q, such that any floating-point number with q
diff --git a/mingw-w64-headers/crt/math.h b/mingw-w64-headers/crt/math.h
index 1e970f4..99a332f 100644
--- a/mingw-w64-headers/crt/math.h
+++ b/mingw-w64-headers/crt/math.h
@@ -216,6 +216,7 @@ extern "C" {
 #endif
   }

+#if 0
   __CRT_INLINE long double __cdecl fabsl (long double x)
   {
 #ifdef __arm__
@@ -226,6 +227,7 @@ extern "C" {
     return res;
 #endif
   }
+#endif

   __CRT_INLINE double __cdecl fabs (double x)
   {
@@ -905,7 +907,7 @@ __mingw_choose_expr (                                         \
 /* 7.12.7.3  */
   extern double __cdecl hypot (double, double) __MINGW_ATTRIB_DEPRECATED_MSVC2005; /* in libmoldname.a */
   extern float __cdecl hypotf (float x, float y);
-#ifndef __CRT__NO_INLINE
+#if 0 //ndef __CRT__NO_INLINE
   __CRT_INLINE float __cdecl hypotf (float x, float y) { return (float) hypot ((double)x, (double)y);}
 #endif
   extern long double __cdecl hypotl (long double, long double);
id=5a5b729d662c6ad069548b1e4331b7f51c31616b'>gnu</a>/<a href='/guix/log/gnu/installer?id=5a5b729d662c6ad069548b1e4331b7f51c31616b'>installer</a>/<a href='/guix/log/gnu/installer/newt?id=5a5b729d662c6ad069548b1e4331b7f51c31616b'>newt</a>/<a href='/guix/log/gnu/installer/newt/network.scm?id=5a5b729d662c6ad069548b1e4331b7f51c31616b'>network.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/installer/newt/network.scm?id=5a5b729d662c6ad069548b1e4331b7f51c31616b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-10-17 16:34:07 +0400'>2022-10-17</span></td><td><a href='/guix/commit/gnu/installer/newt/network.scm?id=883fb8f41b08a8455f16c736a83fb1ae8a3df0a1'>installer: Factorize url-alive? in internet check.</a><span class='msg-avail'>...</span></td><td>Andrew Tropin</td></tr>
<tr><td><span title='2022-10-17 10:22:15 +0400'>2022-10-17</span></td><td><a href='/guix/commit/gnu/installer/newt/network.scm?id=094b357783ae92fc5652f8a8c61e0b96b342d09d'>installer: Relax internet check availability criteria.</a><span class='msg-avail'>...</span></td><td>aleksandr barakin</td></tr>
<tr><td><span title='2022-02-02 16:46:44 +0100'>2022-02-02</span></td><td><a href='/guix/commit/gnu/installer/newt/network.scm?id=726d0bd2f36363392ba2fcefd6e5d4aeed27dc9e'>installer: Use named prompt to abort or break installer steps.</a><span class='msg-avail'>...</span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2022-01-14 14:29:08 +0100'>2022-01-14</span></td><td><a href='/guix/commit/gnu/installer/newt/network.scm?id=ee897e5f51104f41b3c2a0c2cbc7eb4e6c1e4d3e'>installer: Check if ci.guix.gnu.org can be reached.</a><span class='msg-avail'>...</span></td><td>Mathieu Othacehe</td></tr>