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• build x264 failed on apple M1, No working C compiler found

  29 novembre 2021, par louxiu
  

  1. Apple M1, clang

  


  


  Apple clang version 13.0.0 (clang-1300.0.29.3)
Target: arm64-apple-darwin21.1.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin


  


  


  2. x264 version x264-snapshot-20191217-2245

     


  


  3. configure

     


  


  


   ./configure --prefix=/tmp/  --enable-static


  


  

  4. config.log

  


  


  checking for -Werror=unknown-warning-option... yes
checking for -mdynamic-no-pic... yes
x264 configure script
Command line options: "--prefix=/tmp/" "--enable-static"

checking whether gcc works... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH) -mdynamic-no-pic -arch armv7  -Werror=unknown-warning-option    -lm -arch armv7 -o conftest
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.0.0/lib/darwin/libclang_rt.osx.a, missing required architecture armv7 in file /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.0.0/lib/darwin/libclang_rt.osx.a (5 slices)
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libm.tbd, missing required architecture armv7 in file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libm.tbd (3 slices)
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libSystem.tbd, missing required architecture armv7 in file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libSystem.tbd (3 slices)
ld: dynamic main executables must link with libSystem.dylib for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
DIED: No working C compiler found.


  


• aarch64 : Add Apple runtime detection of dotprod and i8mm using sysctl

  26 mai 2023, par Martin Storsjö

  aarch64 : Add Apple runtime detection of dotprod and i8mm using sysctl
  For now, there's not much value in this since Clang don't support
  
  enabling the dotprod or i8mm features with either .arch_extension
  
  or .arch (it has to be enabled by the base arch flags passed to
  
  the compiler). But it may be supported in the future.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure
  • [DH] libavutil/aarch64/cpu.c

• Cleaning AVFrame properly

  12 septembre 2022, par Vencat

  I'm creating AVFrame object using av_frame_alloc() function and clearing it using av_frame_free(&frame) which internally calls av_frame_unref(), but it's not cleaning the memory properly. Heap size of my app grows exponentially in run time.

  



  Not working :

  



  AVFrame* frame = av_frame_alloc();
av_frame_free(&frame);


  



  Working :

  



  AVFrame* frame = av_frame_alloc();
av_free(frame->data[0]);


  



  As far as I know, av_frame_free() calls av_freep() which calls av_free() to free the dynamic memory. Memory gets cleaned, If I use av_free(frame->data[0]) directly instead of av_frame_free(&frame)