Our current version of zlib has a bug where zlib has an unsatisfied
reference to _wopen on Cygnwin.
This is a bug in the upstream zlib and is being discussed there. This
patch (from Yaakov Selkowitz) works around the problem and we'll carry
it as a local change until upstream decides on the proper fix.
Installed on the trunk.
Jeff
diff --git a/zlib/ChangeLog.gcj b/zlib/ChangeLog.gcj
index 4792811..9a7fa51 100644
--- a/zlib/ChangeLog.gcj
+++ b/zlib/ChangeLog.gcj
@@ -1,3 +1,10 @@
+2017-03-15 Yaakov Selkowitz <yselkow...@redhat.com>
+
+ PR bootstrap/79771
+ * gzguts.h (WIDECHAR): Do not define for __CYGWIN__.
+ * zlib.h (gzopen_w): Do not declare for __CYGWIN__.
+ * win32/zlib.def: Remove gzopen_w.
+
2017-01-22 Matthias Klose <d...@ubuntu.com>
* Import zlib 1.2.11.
diff --git a/zlib/gzguts.h b/zlib/gzguts.h
index 990a4d2..6378d46 100644
--- a/zlib/gzguts.h
+++ b/zlib/gzguts.h
@@ -39,7 +39,7 @@
# include <io.h>
#endif
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32)
# define WIDECHAR
#endif
diff --git a/zlib/win32/zlib.def b/zlib/win32/zlib.def
index 784b138..0cb3f5d 100644
--- a/zlib/win32/zlib.def
+++ b/zlib/win32/zlib.def
@@ -91,4 +91,3 @@ EXPORTS
inflateCodesUsed
inflateResetKeep
deflateResetKeep
- gzopen_w
diff --git a/zlib/zlib.h b/zlib/zlib.h
index f09cdaf..49dfcec 100644
--- a/zlib/zlib.h
+++ b/zlib/zlib.h
@@ -1893,7 +1893,7 @@ ZEXTERN int ZEXPORT inflateValidate
OF((z_streamp, int));
ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp));
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
-#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
+#if defined(_WIN32) && !defined(Z_SOLO)
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path,
const char *mode));
#endif
