Error in building FFMPEG-3.4 with Android-NDK-16.1

Trying to compile the FFMPEG-3.4 with Android-NDK-16.1.

Compiling the source on Mac.

Getting below Warnings/Errors:

WARNING: /Users/strehan/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
Error: In file included from libavdevice/avdevice.c:19:0:./libavutil/avassert.h:30:20: fatal error: stdlib.h: No such file or directory
Error: /Users/strehan/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/include/stdint.h:9:26: fatal error: stdint.h: No such file or directory
Error: /libavutil/common.h:33:19: fatal error: errno.h: No such file or directory

Below is the build_script.sh using for build:

#!/bin/bash
NDK=/Users/strehan/Library/Android/sdk/ndk-bundle
SYSROOT=$NDK/platforms/android-21/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64
function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--disable-static \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-doc \
--disable-symver \
--enable-protocol=concat \
--enable-protocol=file \
--enable-muxer=mp4 \
--enable-demuxer=mpegts \
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--enable-cross-compile \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j3
make install
}
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one

Terminal output:

Enabled indevs:
lavfi

Enabled outdevs:

License: LGPL version 2.1 or later

WARNING: /Users/strehan/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-pkg-config not found, library detection may fail.
config.h is unchanged
libavutil/avconfig.h is unchanged
libavcodec/bsf_list.c is unchanged
libavformat/protocol_list.c is unchanged
ffbuild/config.sh is unchanged
GEN libavutil/libavutil.version
GEN libswscale/libswscale.version
GEN libswresample/libswresample.version
GEN libavcodec/libavcodec.version
GEN libavformat/libavformat.version
GEN libavfilter/libavfilter.version
GEN libavdevice/libavdevice.version
CC  libavdevice/alldevices.o
CC  libavdevice/avdevice.o
CC  libavdevice/lavfi.o
In file included from libavdevice/avdevice.c:19:0:
./libavutil/avassert.h:30:20: fatal error: stdlib.h: No such file or directory
 #include <stdlib.h>
                    ^
compilation terminated.
make: *** [libavdevice/avdevice.o] Error 1
make: *** Waiting for unfinished jobs....
In file included from ./libavutil/avutil.h:296:0,
                 from ./libavutil/log.h:25,
                 from libavdevice/avdevice.h:48,
                 from libavdevice/alldevices.c:23:
./libavutil/common.h:33:19: fatal error: errno.h: No such file or directory
 #include <errno.h>
                   ^
compilation terminated.
In file included from ./libavutil/avstring.h:25:0,
                 from ./libavutil/bprint.h:27,
                 from libavdevice/lavfi.c:30:
/Users/strehan/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/include/stdint.h:9:26: fatal error: stdint.h: No such file or directory
 # include_next <stdint.h>
                          ^
make: *** [libavdevice/alldevices.o] Error 1
compilation terminated.
make: *** [libavdevice/lavfi.o] Error 1
INSTALL doc/examples/avio_dir_cmd.c
INSTALL doc/examples/avio_reading.c
INSTALL doc/examples/decode_audio.c
INSTALL doc/examples/decode_video.c
INSTALL doc/examples/demuxing_decoding.c
INSTALL doc/examples/encode_audio.c
INSTALL doc/examples/encode_video.c
INSTALL doc/examples/extract_mvs.c
INSTALL doc/examples/filter_audio.c
INSTALL doc/examples/filtering_audio.c
INSTALL doc/examples/filtering_video.c
INSTALL doc/examples/http_multiclient.c
INSTALL doc/examples/hw_decode.c
INSTALL doc/examples/metadata.c
INSTALL doc/examples/muxing.c
INSTALL doc/examples/qsvdec.c
INSTALL doc/examples/remuxing.c
INSTALL doc/examples/resampling_audio.c
INSTALL doc/examples/scaling_video.c
INSTALL doc/examples/transcode_aac.c
INSTALL doc/examples/transcoding.c
INSTALL doc/examples/vaapi_encode.c
INSTALL doc/examples/README
INSTALL doc/examples/Makefile
INSTALL doc/examples/avio_dir_cmd.c
INSTALL doc/examples/avio_reading.c
INSTALL doc/examples/decode_audio.c
INSTALL doc/examples/decode_video.c
INSTALL doc/examples/demuxing_decoding.c
INSTALL doc/examples/encode_audio.c
INSTALL doc/examples/encode_video.c
INSTALL doc/examples/extract_mvs.c
INSTALL doc/examples/filter_audio.c
INSTALL doc/examples/filtering_audio.c
INSTALL doc/examples/filtering_video.c
INSTALL doc/examples/http_multiclient.c
INSTALL doc/examples/hw_decode.c
INSTALL doc/examples/metadata.c
INSTALL doc/examples/muxing.c
INSTALL doc/examples/qsvdec.c
INSTALL doc/examples/remuxing.c
INSTALL doc/examples/resampling_audio.c
INSTALL doc/examples/scaling_video.c
INSTALL doc/examples/transcode_aac.c
INSTALL doc/examples/transcoding.c
INSTALL doc/examples/vaapi_encode.c
INSTALL doc/examples/README
INSTALL doc/examples/Makefile
CC  libavdevice/alldevices.o
In file included from ./libavutil/avutil.h:296:0,
                 from ./libavutil/log.h:25,
                 from libavdevice/avdevice.h:48,
                 from libavdevice/alldevices.c:23:
./libavutil/common.h:33:19: fatal error: errno.h: No such file or directory
 #include <errno.h>
                   ^
compilation terminated.
make: *** [libavdevice/alldevices.o] Error 1

Please help to fix these errors. Due to these errors/warnings compilation is getting terminated.

Note: Android directory is getting created even after these errors. But I think library is not compiled properly due to above errors.

Let me know if anything else needed. Please help.

Your build script is out of date and not compatible with modern NDKs (it doesn't follow https://android.googlesource.com/platform/ndk/+/master/docs/UnifiedHeaders.md#supporting-unified-headers-in-your-build-system).

I'd recommend saving yourself some trouble and using a standalone toolchain to handle the organizational bits for you.