Restore build on x86_64-w64-mingw32.

gold/
	PR gold/23594
	* configure.ac: Add checks for link, mkdtemp.
	* configure: Regenerate.
	* config.in: Regenerate.
	* plugin.cc (Plugin_recorder::init): Fall back to mktemp
	if mkdtemp is not available.
	(link_or_copy_file): Fall back to copy if link() is not available.

gold/ChangeLog

@@ -1,3 +1,13 @@
+2018-12-03  Alexey Neyman  <stilor@att.net>
+
+	PR gold/23594
+	* configure.ac: Add checks for link, mkdtemp.
+	* configure: Regenerate.
+	* config.in: Regenerate.
+	* plugin.cc (Plugin_recorder::init): Fall back to mktemp
+	if mkdtemp is not available.
+	(link_or_copy_file): Fall back to copy if link() is not available.
+
 2018-12-02  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR binutils/23919

gold/config.in

@@ -103,6 +103,9 @@
 /* Define if your <locale.h> file defines LC_MESSAGES. */
 #undef HAVE_LC_MESSAGES
 
+/* Define to 1 if you have the `link' function. */
+#undef HAVE_LINK
+
 /* Define to 1 if you have the <locale.h> header file. */
 #undef HAVE_LOCALE_H
 
@@ -112,6 +115,9 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define to 1 if you have the `mkdtemp' function. */
+#undef HAVE_MKDTEMP
+
 /* Define to 1 if you have the `mmap' function. */
 #undef HAVE_MMAP
 

gold/configure

@@ -7977,7 +7977,7 @@ fi
 
 done
 
-for ac_func in chsize mmap
+for ac_func in chsize mmap link
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -9866,7 +9866,7 @@ case "$ac_cv_search_dlopen" in
 esac
 
 
-for ac_func in mallinfo posix_fallocate fallocate readv sysconf times
+for ac_func in mallinfo posix_fallocate fallocate readv sysconf times mkdtemp
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_cxx_check_func "$LINENO" "$ac_func" "$as_ac_var"

gold/configure.ac

@@ -529,7 +529,7 @@ LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 AC_SUBST(LFS_CFLAGS)
 
 AC_CHECK_HEADERS(sys/mman.h)
-AC_CHECK_FUNCS(chsize mmap)
+AC_CHECK_FUNCS(chsize mmap link)
 AC_REPLACE_FUNCS(pread ftruncate ffsll)
 
 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
@@ -613,7 +613,7 @@ case "$ac_cv_search_dlopen" in
 esac
 AC_SUBST(DLOPEN_LIBS)
 
-AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times)
+AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times mkdtemp)
 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
 
 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols

gold/plugin.cc

@@ -508,8 +508,20 @@ Plugin_recorder::init()
   // Create a temporary directory where we can stash the log and
   // copies of replacement files.
   char dir_template[] = "gold-recording-XXXXXX";
+#ifdef HAVE_MKDTEMP
   if (mkdtemp(dir_template) == NULL)
     return false;
+#else
+  if (mktemp(dir_template) == NULL)
+    return false;
+#if defined (_WIN32) && !defined (__CYGWIN32__)
+  if (mkdir(dir_template) != 0)
+    return false;
+#else
+  if (mkdir(dir_template, 0700) != 0)
+    return false;
+#endif
+#endif
 
   size_t len = strlen(dir_template) + 1;
   char* tempdir = new char[len];
@@ -562,8 +574,10 @@ link_or_copy_file(const char* inname, const char* outname)
 {
   static char buf[4096];
 
+#ifdef HAVE_LINK
   if (::link(inname, outname) == 0)
     return true;
+#endif
 
   int in = ::open(inname, O_RDONLY);
   if (in < 0)