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• no c compiler found libx264 build [closed]

  24 août 2012, par kerim yucel

  I have been trying to build ffmpeg for Android and I have managed to do so by using roman10's tutorial.

  However, I needed x264 and I enabled libx264 in the configurations but it wasn't able to find the library. A quick internet search led me to the answer that I have to build x264 seperately and include it to ffmpeg config by editing ExternalLibs flags.

  Currently I am using this script to build x264. Everything is fine except the fact that the error saying "No working C compiler is found" pops up. I have updated and installed build-essential and my gcc version is up to date.

  Any help will be appreciated. Thanks a lot.

  P.S. I am using ndk 4 just to make everything compatible with the tutorial link given above. I am running Ubuntu with VirtualBox from Windows 7.

  Edit : I have been trying this tutorial as well, I am getting the same error along with unknown options error for each configuration options.

  Another edit :
  I have tried this code and obtained the following.

  echo 'int main() return 0 ;' > main.c && arm-eabi-gcc main.c || echo $ ?

  /home/mehmet/Android_NDK_r4/build/prebuilt/linux-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld : crt0.o : No such file : No such file or directory collect2 : ld returned
  1 exit status 1

  I have checked the flags as well, flags seem ok or I can't see the faulty line. Above you may find the build script I am using.

  export ARM_ROOT=/home/mehmet/Android_NDK_r4
  
  export ARM_INC=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/include/
  
  export ARM_LIB=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/lib/
  
  export ARM_TOOL=$ARM_ROOT/build/prebuilt/linux-x86/arm-eabi-4.4.0
  
  export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
  
  export PATH=$ARM_TOOL/bin:$PATH
  
  export PATH=$ARM_TOOL/arm-eabi/bin:$PATH
  
  export ARM_PRE=arm-eabi 
  
  ./configure --prefix=/sdcard/arm_and \
  
  --disable-gpac \
  
  --extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
  
  ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
  
  ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
  
  MMD -MP " \
  
  --extra-ldflags=" -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
  
  /lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc " \
  
  --cross-prefix=${ARM_PRE}- \
  
  --disable-asm\
  
  --host=arm-linux \

  Third edit :

  Config.log gives the following.

  x264 configure script
  
  Command line options: "--prefix=/sdcard/arm_and" "--disable-gpac" "--extra-cflags=" "-I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/" "-fPIC" "-DANDROID" "-fpic" "-mthumb-interwork" "-ffunction-sections" "-funwind-tables" "-fstack-prote" "ctor" "-fno-short-enums" "-D__ARM_ARCH_5__" "-D__ARM_ARCH_5T__" "-D__ARM_ARCH_5E__" "-D__ARM_ARCH_5TE__" "-Wno-psabi" "-march=armv5te" "-mtu" "ne=xscale" "-msoft-float" "-mthumb" "-Os" "-fomit-frame-pointer" "-fno-strict-aliasing" "-finline-limit=64" "-DANDROID" "-Wa,--noexecstack" "-" "MMD" "-MP" "--extra-ldflags=" "-nostdlib" "-Bdynamic" "-Wl,--no-undefined" "-Wl,-z,noexecstack" "-Wl,-z,nocopyreloc" "-Wl,-soname,/system" "/lib/libz.so" "-Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker" "-L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/" "-nostdlib" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o" "-lc" "-lm" "-ldl" "-lgcc" "--cross-prefix=arm-eabi-" "--disable-asm" "--host=arm-linux"
  
  
  
      checking whether arm-eabi-gcc works... no
  
      Failed commandline was:
  
      --------------------------------------------------
  
      arm-eabi-gcc conftest.c -Wall -I. -I$(SRCPATH) -I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/ -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
  
      ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
  
      ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
  
      MMD -MP -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
  
      /lib/libz.so -Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker -L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/ -nostdlib /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o -lc -lm -ldl -lgcc -lm -o conftest
  
      arm-eabi-gcc: ctor: No such file or directory
  
      arm-eabi-gcc: ne=xscale: No such file or directory
  
      arm-eabi-gcc: MMD: No such file or directory
  
      arm-eabi-gcc: /lib/libz.so: No such file or directory
  
      cc1: error: unrecognized command line option "-mtu"
  
      cc1: error: unrecognized command line option "-fstack-prote"
  
      cc1: error: to generate dependencies you must specify either -M or -MM
  
      arm-eabi-gcc: -E or -x required when input is from standard input
  
      --------------------------------------------------
  
      Failed program was:
  
      --------------------------------------------------
  
      int main () { return 0; }
  
      --------------------------------------------------
  
      DIED: No working C compiler found.

  Last edit
  Problem solved. It was just a mistake related to typos. It works well now.

• no c compiler found libx264 build [closed]

  24 août 2012, par kerim yucel

  I have been trying to build ffmpeg for Android and I have managed to do so by using roman10's tutorial.

  However, I needed x264 and I enabled libx264 in the configurations but it wasn't able to find the library. A quick internet search led me to the answer that I have to build x264 seperately and include it to ffmpeg config by editing ExternalLibs flags.

  Currently I am using this script to build x264. Everything is fine except the fact that the error saying "No working C compiler is found" pops up. I have updated and installed build-essential and my gcc version is up to date.

  Any help will be appreciated. Thanks a lot.

  P.S. I am using ndk 4 just to make everything compatible with the tutorial link given above. I am running Ubuntu with VirtualBox from Windows 7.

  Edit : I have been trying this tutorial as well, I am getting the same error along with unknown options error for each configuration options.

  Another edit :
  I have tried this code and obtained the following.

  echo 'int main() return 0 ;' > main.c && arm-eabi-gcc main.c || echo $ ?

  /home/mehmet/Android_NDK_r4/build/prebuilt/linux-x86/arm-eabi-4.4.0/bin/../lib/gcc/arm-eabi/4.4.0/../../../../arm-eabi/bin/ld : crt0.o : No such file : No such file or directory collect2 : ld returned
  1 exit status 1

  I have checked the flags as well, flags seem ok or I can't see the faulty line. Above you may find the build script I am using.

  export ARM_ROOT=/home/mehmet/Android_NDK_r4
  
  export ARM_INC=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/include/
  
  export ARM_LIB=$ARM_ROOT/build/platforms/android-8/arch-arm/usr/lib/
  
  export ARM_TOOL=$ARM_ROOT/build/prebuilt/linux-x86/arm-eabi-4.4.0
  
  export ARM_LIBO=$ARM_TOOL/lib/gcc/arm-eabi/4.4.0
  
  export PATH=$ARM_TOOL/bin:$PATH
  
  export PATH=$ARM_TOOL/arm-eabi/bin:$PATH
  
  export ARM_PRE=arm-eabi 
  
  ./configure --prefix=/sdcard/arm_and \
  
  --disable-gpac \
  
  --extra-cflags=" -I$ARM_INC -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
  
  ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
  
  ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
  
  MMD -MP " \
  
  --extra-ldflags=" -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
  
  /lib/libz.so -Wl,-rpath-link=$ARM_LIB,-dynamic-linker=/system/bin/linker -L$ARM_LIB -nostdlib $ARM_LIB/crtbegin_dynamic.o $ARM_LIB/crtend_android.o -lc -lm -ldl -lgcc " \
  
  --cross-prefix=${ARM_PRE}- \
  
  --disable-asm\
  
  --host=arm-linux \

  Third edit :

  Config.log gives the following.

  x264 configure script
  
  Command line options: "--prefix=/sdcard/arm_and" "--disable-gpac" "--extra-cflags=" "-I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/" "-fPIC" "-DANDROID" "-fpic" "-mthumb-interwork" "-ffunction-sections" "-funwind-tables" "-fstack-prote" "ctor" "-fno-short-enums" "-D__ARM_ARCH_5__" "-D__ARM_ARCH_5T__" "-D__ARM_ARCH_5E__" "-D__ARM_ARCH_5TE__" "-Wno-psabi" "-march=armv5te" "-mtu" "ne=xscale" "-msoft-float" "-mthumb" "-Os" "-fomit-frame-pointer" "-fno-strict-aliasing" "-finline-limit=64" "-DANDROID" "-Wa,--noexecstack" "-" "MMD" "-MP" "--extra-ldflags=" "-nostdlib" "-Bdynamic" "-Wl,--no-undefined" "-Wl,-z,noexecstack" "-Wl,-z,nocopyreloc" "-Wl,-soname,/system" "/lib/libz.so" "-Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker" "-L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/" "-nostdlib" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o" "/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o" "-lc" "-lm" "-ldl" "-lgcc" "--cross-prefix=arm-eabi-" "--disable-asm" "--host=arm-linux"
  
  
  
      checking whether arm-eabi-gcc works... no
  
      Failed commandline was:
  
      --------------------------------------------------
  
      arm-eabi-gcc conftest.c -Wall -I. -I$(SRCPATH) -I/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/include/ -fPIC -DANDROID -fpic -mthumb-interwork -ffunction-sections -funwind-tables -fstack-prote
  
      ctor -fno-short-enums -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -Wno-psabi -march=armv5te -mtu
  
      ne=xscale -msoft-float -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -DANDROID -Wa,--noexecstack -
  
      MMD -MP -nostdlib -Bdynamic -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,nocopyreloc -Wl,-soname,/system
  
      /lib/libz.so -Wl,-rpath-link=/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/,-dynamic-linker=/system/bin/linker -L/home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib/ -nostdlib /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtbegin_dynamic.o /home/mehmet/Android_NDK_r4/build/platforms/android-8/arch-arm/usr/lib//crtend_android.o -lc -lm -ldl -lgcc -lm -o conftest
  
      arm-eabi-gcc: ctor: No such file or directory
  
      arm-eabi-gcc: ne=xscale: No such file or directory
  
      arm-eabi-gcc: MMD: No such file or directory
  
      arm-eabi-gcc: /lib/libz.so: No such file or directory
  
      cc1: error: unrecognized command line option "-mtu"
  
      cc1: error: unrecognized command line option "-fstack-prote"
  
      cc1: error: to generate dependencies you must specify either -M or -MM
  
      arm-eabi-gcc: -E or -x required when input is from standard input
  
      --------------------------------------------------
  
      Failed program was:
  
      --------------------------------------------------
  
      int main () { return 0; }
  
      --------------------------------------------------
  
      DIED: No working C compiler found.

  Last edit
  Problem solved. It was just a mistake related to typos. It works well now.

• Unknown reason of an error while debugging an Opencv project using opencv2 functions

  30 mars 2013, par Animesh Pandey

  I have openCV 2.3 and I am using Visual Studio 2010.

      ...
  
  VideoCapture cap;
  
  cap.open("Video.avi");
  
  if( !cap.isOpened() )
  
  {
  
  
  
      puts("***Could not initialize capturing...***\n");
  
      system("Pause");
  
      return 0;
  
  } ...

  This is a code snippet of the while program.
  I added a system command in order to hold the output window. I got no errors while building the project but when I began debugging, the output window had this output :

  warning: Error opening file (../../modules/highgui/src/cap_ffmpeg_impl.hpp:477)
  
  ***Could not initialize capturing...***
  
  
  
  Press any key to continue . . .

  I checked this directory, the file is available but then why is it that it doesn't open ?
  I even have the opencv_ffmpeg.dll in the bin folder with its path added to System Paths.
  Still I get this same error ....
  I even checked first 3 pages of google search I did but could not find an answer.
  So please help !

  ---

  The error which I mentioned is because, there has been an error in opening the .avi file ...
  This is the part of code in cap_ffmpeg_impl.hpp -

  int err = av_open_input_file(&ic, _filename, NULL, 0, NULL);
  
  if (err < 0) {
  
      CV_WARN("Error opening file"); //Error part
  
      goto exit_func;
  
  }

  This file is available at D :\OpenCV2.3\opencv\modules\highgui\src. When I make any changes in this file, they do not reflect on the output window and when I removed this file, even then it did not give any error !:O
  I am not able to understand what is happening ....??