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• How to fix the "No working C compiler found." problem for compiling x264 in Linux ?

  27 février 2023, par gc xu

  Firstly I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc...
I git clone the source code from https://code.videolan.org/videolan/x264.git.
Then, I run command ./configure, it shows

  


  ./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
./configure: line 169: conftest.log: Invalid argument
No working C compiler found.


  


  I check the file "config.log". It shows :

  


  checking for -Werror=unknown-warning-option... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-warning-option   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=unknown-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=unknown-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
checking for -Werror=ignored-attributes... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c  -Wall -I. -I$(SRCPATH)   -Werror=ignored-attributes   -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
x264 configure script
Command line options: "--enable-shared" "--enable-static"

checking whether gcc works... no
Failed commandline was:
--------------------------------------------------
gcc conftest.c -m64  -Wall -I. -I$(SRCPATH)     -m64  -lm -o conftest
cc1: error: ‘-Werror=unknown-warning-option’: no option -Wunknown-warning-option
--------------------------------------------------
Failed program was:
--------------------------------------------------
int main (void) {  return 0; }
--------------------------------------------------
DIED: No working C compiler found.


  


  Plus I wonder is there something to do with nasm ? Becasuse I install nasm with some C grammer problems :

  


  ./config/config.h:659:16: error: duplicate ‘unsigned’
  659 | #define size_t unsigned int
      |                ^~~~~~~~
./config/config.h:659:25: error: two or more data types in declaration specifiers
  659 | #define size_t unsigned int
      |                         ^~~
In file included from /usr/include/string.h:633,
                 from ./include/compiler.h:89,
                 from asm/nasm.c:38:
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘__extension__’
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
./include/compiler.h:241:7: error: expected identifier or ‘(’ before ‘)’ token
  241 | char *strsep(char **, const char *);
      |       ^~~~~~
make[1]: *** [asm/nasm.o] Error 1
make[1]: Leaving directory `/mnt/nfs0/gengcheng/ffmpeg-5.0.2/nasm-2.15.05'
make: *** [all] Error 2


  


  I have read all other solutions related to this problem, including adding path and reinstall yasm, nasm, gcc...
I want to install x264 to configure it in ffmpeg. Thanks for all your answers !

  


• Revision cc9c637d07 : Improves subpixel reference mv evaluation Previously, in evaluating reference m

  26 octobre 2012, par Yaowu Xu

  Changed Paths : Modify /vp8/common/findnearmv.c Modify /vp8/encoder/variance_c.c Improves subpixel reference mv evaluation Previously, in evaluating reference motion vectors, MVs are always rounded to integer pixel position and SADs are calculated. This commit takes into account the subpixel (...)

• Facing libavfilter error while doing cmake for NVIDIA-DALI library on ubuntu version

  27 avril 2019, par vamsi

  — Installed OpenCV 3.4.4 which NVIDIA DALI recommended.
  — below link for NVIDIA DALI reference.
  https://docs.nvidia.com/deeplearning/sdk/dali-developer guide/docs/quickstart.html
  — below link for OpenCV installation :
  https://www.pyimagesearch.com/2018/05/28/ubuntu-18-04-how-to-install-opencv/

  —NVIDIA DALI using below versions :
  -DALI version : 0.10.0dev
  -Found PythonInterp : /usr/bin/python (found version "2.7.15")
  -Found CUDA : /usr (found suitable version "9.1", minimum required is "8.0")
  -Found OpenCV : /usr/local/include ;/usr/local/include/opencv (found suitable version "3.4.4", minimum required is "2.0")

  ---This is the error(No package ’libavfilter’ found) i am getting.

  • Found CUDA : /usr (found suitable version "9.1", minimum required is "8.0")
     Building WITHOUT nvJPEG
     Building WITHOUT JpegTurbo
     Found OpenCV : /usr/local/include ;/usr/local/include/opencv (found suitable version "3.4.4", minimum required is "2.0")
    OpenCV libraries :
    opencv_core ;opencv_imgproc ;opencv_imgcodecs

  • Found PythonLibs : /usr/lib/x86_64-linux-gnu/libpython2.7.so
     pybind11 v2.2.4
     Found Protobuf : /usr/lib/x86_64-linux-gnu/libprotobuf.a ;-lpthread (found suitable version "3.0.0", minimum required is "2.0")

  • Enabling TensorFlow TFRecord file format support

  • Found PkgConfig : /usr/bin/pkg-config (found version "0.29.1")
  • Checking for module ’libavformat’
  • Found libavformat, version 58.20.100
     Checking for module ’libavcodec’
  • Found libavcodec, version 58.35.100
     Checking for module ’libavfilter’
    No package ’libavfilter’ found

  CMake Error at /usr/share/cmake-3.10/Modules/FindPkgConfig.cmake:415 (message) :
  A required package was not found
  Call Stack (most recent call first) :
  /usr/share/cmake-3.10/Modules/FindPkgConfig.cmake:593 (_pkg_check_modules_internal)
  cmake/Dependencies.cmake:176 (pkg_check_modules)
  CMakeLists.txt:45 (include)
   Configuring incomplete, errors occurred !
  See also