[Bug 794583] New: Build failure with commit 8ee306e

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=794583

            Bug ID: 794583
           Summary: Build failure with commit 8ee306e
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: blocker
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: jayeshece08 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

https://cgit.freedesktop.org/gstreamer/gst-plugins-base/commit/?id=8ee306eb3fb69c34c579874f6aedcecb6d94a855
is breaking the build.

Snip:
21:44:21,429 INFO  - libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../../..
-I/opt/media/install/include -I../../../gst-libs -I../../../gst-libs -pthread
-I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread
-I/opt/media/install/include/gstreamer-1.0 -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -fno-strict-aliasing
-DG_THREADS_MANDATORY -DG_DISABLE_DEPRECATED -Wall
-Wdeclaration-after-statement -Wvla -Wpointer-arith -Wmissing-declarations
-Wmissing-prototypes -Wredundant-decls -Wundef -Wwrite-strings
-Wformat-nonliteral -Wformat-security -Winit-self -Wmissing-include-dirs
-Waddress -Wno-multichar -Wnested-externs -Werror -g -DGST_DISABLE_DEPRECATED
-fvisibility=hidden -g3 -MT libgstallocators_1.0_la-gstphysmemory.lo -MD -MP
-MF .deps/libgstallocators_1.0_la-gstphysmemory.Tpo -c gstphysmemory.c -fPIC
-DPIC -o .libs/libgstallocators_1.0_la-gstphysmemory.o
21:44:21,521 INFO  - gstdmabuf.c: In function 'gst_dmabuf_mem_map':
21:44:21,521 INFO  - gstdmabuf.c:62:3: error: 'ret' undeclared (first use in
this function)
21:44:21,522 INFO  - ret = allocator->mem_map (gmem, maxsize, info->flags);
21:44:21,522 INFO  - ^
21:44:21,522 INFO  - gstdmabuf.c:62:3: note: each undeclared identifier is
reported only once for each function it appears in
21:44:21,523 INFO  - gstdmabuf.c:73:1: error: control reaches end of non-void
function [-Werror=return-type]
21:44:21,523 INFO  - }
21:44:21,523 INFO  - ^
21:44:21,523 INFO  - cc1: all warnings being treated as errors
21:44:21,527 INFO  - Makefile:747: recipe for target
'libgstallocators_1.0_la-gstdmabuf.lo' failed
21:44:21,527 INFO  - make[4]: *** [libgstallocators_1.0_la-gstdmabuf.lo] Error
1
21:44:21,527 INFO  - make[4]: *** Waiting for unfinished jobs....
21:44:21,564 INFO  - mv -f .deps/libgstallocators_1.0_la-gstphysmemory.Tpo
.deps/libgstallocators_1.0_la-gstphysmemory.Plo
21:44:21,650 INFO  - mv -f .deps/libgstallocators_1.0_la-gstfdmemory.Tpo
.deps/libgstallocators_1.0_la-gstfdmemory.Plo
21:44:21,653 INFO  - make[4]: Leaving directory
'/opt/media/build/gst-plugins-base/gst-libs/gst/allocators'
21:44:21,655 INFO  - Makefile:659: recipe for target 'all-recursive' failed
21:44:21,655 INFO  - make[3]: *** [all-recursive] Error 1
21:44:21,655 INFO  - make[3]: Leaving directory
'/opt/media/build/gst-plugins-base/gst-libs/gst'
21:44:21,656 INFO  - Makefile:624: recipe for target 'all-recursive' failed
21:44:21,656 INFO  - make[2]: *** [all-recursive] Error 1
21:44:21,656 INFO  - make[2]: Leaving directory
'/opt/media/build/gst-plugins-base/gst-libs'
21:44:21,657 INFO  - Makefile:748: recipe for target 'all-recursive' failed
21:44:21,657 INFO  - make[1]: *** [all-recursive] Error 1
21:44:21,657 INFO  - make[1]: Leaving directory
'/opt/media/build/gst-plugins-base'
21:44:21,657 INFO  - Makefile:679: recipe for target 'all' failed
21:44:21,657 INFO  - make: *** [all] Error 2
21:44:21,657 INFO  - err: "make -j 88" failed - exitcode 2
21:44:21,658 INFO  - aborting...

Analysis:
On a build machine with : HAVE_LINUX_DMA_BUF_H not defined, the build is
breaking due to non-definition of 'ret'

https://cgit.freedesktop.org/gstreamer/gst-plugins-base/tree/gst-libs/gst/allocators/gstdmabuf.c?id=8ee306eb3fb69c34c579874f6aedcecb6d94a855#n53

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