[FFmpeg-trac] #9986(avutil:new): Compilation error [-Wincompatible-pointer-types] on AOSP for x86 (32bits)

[FFmpeg]

#9986: Compilation error [-Wincompatible-pointer-types] on AOSP for x86 (32bits)
-------------------------------------+----------------------------------
             Reporter:  goffioul     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avutil
              Version:  unspecified  |               Resolution:
             Keywords:  android      |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+----------------------------------
Comment (by goffioul):

 As the relevant code in libavutil/hwcontext_vaapi.c hasn't changed between
 5.1.2 and current git head, the issue is still present there. It is also
 not specific to Android, you just need the following combination: 32 bits
 + VA-API + libdrm.

 So using current git head (65f96a965af415300f7533c75940eeae4e3a2287) and
 the following configure line on Linux (Fedora 35, gcc 11.3.1):

 {{{
 PKG_CONFIG_PATH=/usr/lib/pkgconfig ../configure \
     --disable-static --enable-shared \
     --arch=x86 --cpu=i686 --build_suffix= \
     --extra-cflags=-m32 --extra-ldflags=-m32 --disable-x86asm \
     --extra-cflags=-Werror=incompatible-pointer-types \
     --extra-cflags=-Werror=format \
     --enable-libdrm
 }}}

 you reach the same compilation error:

 {{{
 CC      libavutil/hwcontext_vaapi.o
 src/libavutil/hwcontext_vaapi.c: In function ‘vaapi_map_from_drm’:
 src/libavutil/hwcontext_vaapi.c:1216:34: error: assignment to ‘uintptr_t
 *’ {aka ‘unsigned int *’} from incompatible pointer type ‘long unsigned
 int *’ [-Werror=incompatible-pointer-types]
  1216 |         buffer_desc.buffers      = &buffer_handle;
       |                                  ^
 src/libavutil/hwcontext_vaapi.c: In function ‘vaapi_map_to_drm_abh’:
 src/libavutil/hwcontext_vaapi.c:1514:51: error: format ‘%ld’ expects
 argument of type ‘long int’, but argument 4 has type ‘uintptr_t’ {aka
 ‘unsigned int’} [-Werror=format=]
  1514 |     av_log(hwfc, AV_LOG_DEBUG, "DRM PRIME fd is %ld.\n",
       |                                                 ~~^
       |                                                   |
       |                                                   long int
       |                                                 %d
  1515 |            mapping->buffer_info.handle);
       |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~
       |                                |
       |                                uintptr_t {aka unsigned int}
 cc1: some warnings being treated as errors
 make: *** [src/ffbuild/common.mak:81: libavutil/hwcontext_vaapi.o] Error 1
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9986#comment:2>
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