define use_mtpz only in one .c file

backport-libmtp-fix-multiple-definition.patch

@@ -0,0 +1,21 @@
+--- a/src/libmtp.c	2017-06-10 22:35:54.000000000 +0800
++++ b/src/libmtp.c	2021-08-04 19:17:57.464456535 +0800
+@@ -44,6 +44,7 @@
+ #include "util.h"
+ 
+ #include "mtpz.h"
++int use_mtpz;
+ 
+ #include <stdarg.h>
+ #include <stdlib.h>
+--- a/src/mtpz.h	2014-08-25 02:41:04.000000000 +0800
++++ b/src/mtpz.h	2021-08-04 19:17:03.819790448 +0800
+@@ -45,7 +45,7 @@
+ 
+ #endif
+ 
+-int use_mtpz;
++extern int use_mtpz;
+ 
+ #endif /* LIBMTP_H_INCLUSION_GUARD */
+ 

libmtp.spec

@@ -1,11 +1,12 @@
 Name:           libmtp
 Version:        1.1.14
-Release:        6
+Release:        7
 Summary:        An Initiator implementation of the Media Transfer Protocol (MTP) in the form of a library
 License:        LGPLv2+
 URL:            http://libmtp.sourceforge.net/
 Source0:        https://download.sourceforge.net/%{name}/%{name}-%{version}.tar.gz
 Patch0:         0001-doc-Don-t-document-internal-endian-macros.patch
+Patch1:         backport-libmtp-fix-multiple-definition.patch
 
 BuildRequires:  libusbx-devel, doxygen, libgcrypt-devel, chrpath, gcc
 Requires:       udev
@@ -26,7 +27,7 @@ Requires:       pkgconfig, libusb1-devel, libgcrypt-devel
 This package includes development files for libmtp.
 
 %prep
-%autosetup -p1
+%autosetup -n libmtp-%{version} -p1
 
 %build
 %configure --disable-static --with-udev-rules=69-libmtp.rules
@@ -65,6 +66,9 @@ chrpath -d $RPM_BUILD_ROOT{%{_bindir},/usr/lib/udev}/mtp*
 %{_libdir}/pkgconfig/%{name}.pc
 
 %changelog
+* Web Aug 04 2021 Liu Yinsi <liuyinsi@163.com> - 1.1.14-7
+- define use_mtpz only in one .c file
+
 * Tue Jun 08 2021 wulei <wulei80@huawei.com> - 1.1.14-6
 - fixes failed: error: no acceptable C compiler found in $PATH