[FFmpeg-trac] #7130(avcodec:new): Android compilation broken with FFmpeg 3.4.2

[FFmpeg]

#7130: Android compilation broken with FFmpeg 3.4.2
-----------------------------------+---------------------------------------
             Reporter:  donturner  |                     Type:  defect
               Status:  new        |                 Priority:  normal
            Component:  avcodec    |                  Version:  unspecified
             Keywords:             |               Blocked By:
             Blocking:             |  Reproduced by developer:  0
Analyzed by developer:  0          |
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 Summary of the bug:

 When compiling FFmpeg 3.4.2 for Android using the latest version of the
 Android NDK (16.1.4479499) the following error is produced:

 libavcodec/aaccoder.c: In function 'search_for_ms':
 libavcodec/aaccoder.c:803:25: error: expected identifier or '(' before
 numeric constant
                      int B0 = 0, B1 = 0;

 How to reproduce:

 - Download the Android NDK from:
 https://developer.android.com/ndk/downloads/index.html
 - Set an environment variable ANDROID_NDK to the NDK root directory
 - Download FFmpeg 3.4.2 source
 - Use the following bash script to configure the build:

 #!/bin/bash

 PLATFORM=${ANDROID_NDK}/platforms/android-16/arch-arm

 ./configure \
 --prefix=build/armeabi-v7a \
 --target-os=linux \
 --arch=arm \
 --cc=${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-
 x86_64/bin/arm-linux-androideabi-gcc \
 --nm=${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-
 x86_64/bin/arm-linux-androideabi-nm \
 --strip=${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.9/prebuilt
 /darwin-x86_64/bin/arm-linux-androideabi-strip \
 --cross-prefix=arm-linux-androideabi- \
 --extra-libs="-lgcc" \
 --sysroot=${ANDROID_NDK}/sysroot \
 --extra-cflags="-I${ANDROID_NDK}/sysroot/usr/include/arm-linux-
 androideabi" \
 --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib
 -nostdlib -lc -lm -ldl -llog" \
 --enable-cross-compile \
 --enable-small \
 --disable-programs \
 --disable-doc \
 --enable-shared \
 --disable-static

 Then execute:

 make

 Expected outcome:

 FFmpeg compiles without error

 Actual outcome:

 The following error is produced:

 libavcodec/aaccoder.c: In function 'search_for_ms':
 libavcodec/aaccoder.c:803:25: error: expected identifier or '(' before
 numeric constant
                      int B0 = 0, B1 = 0;

 The problem seems to be a name clash with #define B0 in
 $ANDROID_NDK/sysroot/usr/include/asm-generic/termbits.h

 Here's a blog post from someone experiencing the same issue:
 https://medium.com/@piyush1995bhandari/cross-compiling-ffmpeg-for-android-
 545a1cfca31e

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7130>
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