ijkplayer iOS编译问题之[-Wincompatible-function-pointer-types]

编译环境 Apple M1 Pro Sonoma 14.1.2
编译的时候出现如下报错：

1. libavcodec/aarch64/h264dsp_init_aarch64.c:84:38: error: incompatible function pointer types assigning to 'h264_weight_func' (aka 'void (*)(unsigned char *, long, int, int, int, int)') from 'void (uint8_t *, int, int, int, int, int)' (aka 'void (unsigned char *, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
2.         c->weight_h264_pixels_tab[0] = ff_weight_h264_pixels_16_neon;
3.                                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4. libavcodec/aarch64/h264dsp_init_aarch64.c:85:38: error: incompatible function pointer types assigning to 'h264_weight_func' (aka 'void (*)(unsigned char *, long, int, int, int, int)') from 'void (uint8_t *, int, int, int, int, int)' (aka 'void (unsigned char *, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
5.         c->weight_h264_pixels_tab[1] = ff_weight_h264_pixels_8_neon;
6.                                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7. libavcodec/aarch64/h264dsp_init_aarch64.c:86:38: error: incompatible function pointer types assigning to 'h264_weight_func' (aka 'void (*)(unsigned char *, long, int, int, int, int)') from 'void (uint8_t *, int, int, int, int, int)' (aka 'void (unsigned char *, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
8.         c->weight_h264_pixels_tab[2] = ff_weight_h264_pixels_4_neon;
9.                                      ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10. libavcodec/aarch64/h264dsp_init_aarch64.c:88:40: error: incompatible function pointer types assigning to 'h264_biweight_func' (aka 'void (*)(unsigned char *, unsigned char *, long, int, int, int, int, int)') from 'void (uint8_t *, uint8_t *, int, int, int, int, int, int)' (aka 'void (unsigned char *, unsigned char *, int, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
11.         c->biweight_h264_pixels_tab[0] = ff_biweight_h264_pixels_16_neon;
12.                                        ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
13. libavcodec/aarch64/h264dsp_init_aarch64.c:89:40: error: incompatible function pointer types assigning to 'h264_biweight_func' (aka 'void (*)(unsigned char *, unsigned char *, long, int, int, int, int, int)') from 'void (uint8_t *, uint8_t *, int, int, int, int, int, int)' (aka 'void (unsigned char *, unsigned char *, int, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
14.         c->biweight_h264_pixels_tab[1] = ff_biweight_h264_pixels_8_neon;
15.                                        ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
16. libavcodec/aarch64/h264dsp_init_aarch64.c:90:40: error: incompatible function pointer types assigning to 'h264_biweight_func' (aka 'void (*)(unsigned char *, unsigned char *, long, int, int, int, int, int)') from 'void (uint8_t *, uint8_t *, int, int, int, int, int, int)' (aka 'void (unsigned char *, unsigned char *, int, int, int, int, int, int)') [-Wincompatible-function-pointer-types]
17.         c->biweight_h264_pixels_tab[2] = ff_biweight_h264_pixels_4_neon;
18.                                        ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19. 6 errors generated.
20. make: *** [libavcodec/aarch64/h264dsp_init_aarch64.o] Error 1
21. make: *** Waiting for unfinished jobs....

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搜了搜好像没找到相干编译问题的，但是还需要用这个东西，只能再研究一下日志了，发现每个错误都有一个 [-Wincompatible-function-pointer-types]，感觉好像就跟这个有关系了，然后搜了搜尝试修改一下解决了问题。
修改方法如下

找到do-compile-ffmpeg.sh 这个文件

1. FFMPEG_CFLAGS=
2. FFMPEG_CFLAGS="$FFMPEG_CFLAGS -arch $FF_ARCH"
3. FFMPEG_CFLAGS="$FFMPEG_CFLAGS $FF_XCRUN_OSVERSION"
4. FFMPEG_CFLAGS="$FFMPEG_CFLAGS $FFMPEG_EXTRA_CFLAGS"
5. FFMPEG_CFLAGS="$FFMPEG_CFLAGS $FF_XCODE_BITCODE"
6. FFMPEG_CFLAGS="$FFMPEG_CFLAGS -Wno-error=incompatible-function-pointer-types" # 加上这个就能编译过了

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接下来就没问题了。

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