From: Tim Kientzle <kientzle@gmail.com>
Date: Sat, 5 Sep 2009 02:41:09 +0000 (-0400)
Subject: Probe for CreateHardLinkW and use it only if it's found.
X-Git-Tag: v2.8.0~385
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3407cbf6a0ff6e6f05b2228a1f934b4223871e81;p=thirdparty%2Flibarchive.git

Probe for CreateHardLinkW and use it only if it's found.
(Needed for MinGW, which doesn't have new enough Windows
headers to compile calls to CreateHardLinkW.)

SVN-Revision: 1423
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa7d5b28d..11f511dc0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -337,6 +337,7 @@ CHECK_FUNCTION_EXISTS(SHA512_Init HAVE_SHA512)
 # Check functions
 #
 CHECK_SYMBOL_EXISTS(CreateHardLinkA "windows.h" HAVE_CREATEHARDLINKA)
+CHECK_SYMBOL_EXISTS(CreateHardLinkW "windows.h" HAVE_CREATEHARDLINKW)
 CHECK_FUNCTION_EXISTS_GLIBC(chflags HAVE_CHFLAGS)
 CHECK_FUNCTION_EXISTS_GLIBC(chown HAVE_CHOWN)
 CHECK_FUNCTION_EXISTS_GLIBC(chroot HAVE_CHROOT)
diff --git a/build/cmake/config.h.in b/build/cmake/config.h.in
index 0347d8959..416ffc18a 100644
--- a/build/cmake/config.h.in
+++ b/build/cmake/config.h.in
@@ -57,11 +57,11 @@
 /* Define to 1 if you have the `chroot' function. */
 #cmakedefine HAVE_CHROOT 1
 
-/* Define to 1 if you have the `CreateSymbolicLink function. */
-#cmakedefine HAVE_CREATESYMBOLICLINK 1
+/* Define to 1 if you have the `CreateHardLinkA' function. */
+#cmakedefine HAVE_CREATEHARDLINKA 1
 
-/* Define to 1 if you have the `CreateHardLink function. */
-#cmakedefine HAVE_CREATEHARDLINK 1
+/* Define to 1 if you have the `CreateHardLinkW' function. */
+#cmakedefine HAVE_CREATEHARDLINKW 1
 
 /* Define to 1 if you have the <ctype.h> header file. */
 #cmakedefine HAVE_CTYPE_H 1
diff --git a/libarchive/archive_windows.c b/libarchive/archive_windows.c
index 2e5e8578a..cd3a06733 100644
--- a/libarchive/archive_windows.c
+++ b/libarchive/archive_windows.c
@@ -218,6 +218,10 @@ la_CreateFile(const char *path, DWORD dwDesiredAccess, DWORD dwShareMode,
 	return (handle);
 }
 
+#if HAVE_CREATEHARDLINKW
+/* Check that path1 and path2 can be hard-linked by each other.
+ * Both arguments must be made by permissive_name function. 
+ */
 static size_t
 wequallen(const wchar_t *s1, const wchar_t *s2)
 {
@@ -229,9 +233,6 @@ wequallen(const wchar_t *s1, const wchar_t *s2)
 	return (i);
 }
 
-/* Check that path1 and path2 can be hard-linked by each other.
- * Both arguments must be made by permissive_name function. 
- */
 static int
 canHardLinkW(const wchar_t *path1, const wchar_t *path2)
 {
@@ -297,6 +298,7 @@ canHardLinkW(const wchar_t *path1, const wchar_t *path2)
 	else
 		return (0);
 }
+#endif
 
 /* Make a link to src called dst.  */
 static int
@@ -328,9 +330,11 @@ __link(const char *src, const char *dst, int sym)
 			retval = -1;
 			goto exit;
 		}
+#if HAVE_CREATEHARDLINKW
 		if (!sym && canHardLinkW(wsrc, wdst))
 			res = CreateHardLinkW(wdst, wsrc, NULL);
 		else
+#endif
 			res = CopyFileW(wsrc, wdst, FALSE);
 	} else {
 		/* wsrc does not exist; try src prepend it with the dirname of wdst */
@@ -387,9 +391,11 @@ __link(const char *src, const char *dst, int sym)
 			retval = -1;
 			goto exit;
 		}
+#if HAVE_CREATEHARDLINKW
 		if (!sym && canHardLinkW(wnewsrc, wdst))
 			res = CreateHardLinkW(wdst, wnewsrc, NULL);
 		else
+#endif
 			res = CopyFileW(wnewsrc, wdst, FALSE);
 		free (wnewsrc);
 	}