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build_system.txt

build_system.txt 2.0 KB
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  1. FFmpeg currently uses a custom build system, this text attempts to document
    2. 

  2. some of its obscure features and options.
    3. 

  3. 

  4. Makefile variables:
    5. 

  5. 

  6. V
    7. 

  7.     Disable the default terse mode, the full command issued by make and its
    8. 

  8.     output will be shown on the screen.
    9. 

  9. 

  10. DBG
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  11.     Preprocess x86 external assembler files to a .dbg.asm file in the object
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  12.     directory, which then gets compiled. Helps in developing those assembler
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  13.     files.
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  14. 

  15. DESTDIR
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  16.     Destination directory for the install targets, useful to prepare packages
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  17.     or install FFmpeg in cross-environments.
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  18. 

  19. GEN
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  20.     Set to ‘1’ to generate the missing or mismatched references.
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  21. 

  22. Makefile targets:
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  23. 

  24. all
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  25.     Default target, builds all the libraries and the executables.
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  26. 

  27. fate
    28. 

  28.     Run the fate test suite, note that you must have installed it.
    29. 

  29. 

  30. fate-list
    31. 

  31.     List all fate/regression test targets.
    32. 

  32. 

  33. fate-list-failing
    34. 

  34.     List the fate tests that failed the last time they were executed.
    35. 

  35. 

  36. fate-clear-reports
    37. 

  37.     Remove the test reports from previous test executions (getting rid of
    38. 

  38.     potentially stale results from fate-list-failing).
    39. 

  39. 

  40. install
    41. 

  41.     Install headers, libraries and programs.
    42. 

  42. 

  43. examples
    44. 

  44.     Build all examples located in doc/examples.
    45. 

  45. 

  46. checkheaders
    47. 

  47.     Check headers dependencies.
    48. 

  48. 

  49. alltools
    50. 

  50.     Build all tools in tools directory.
    51. 

  51. 

  52. config
    53. 

  53.     Reconfigure the project with the current configuration.
    54. 

  54. 

  55. tools/target_dec_<decoder>_fuzzer
    56. 

  56.     Build fuzzer to fuzz the specified decoder.
    57. 

  57. 

  58. tools/target_bsf_<filter>_fuzzer
    59. 

  59.     Build fuzzer to fuzz the specified bitstream filter.
    60. 

  60. 

  61. Useful standard make commands:
    62. 

  62. make -t <target>
    63. 

  63.     Touch all files that otherwise would be built, this is useful to reduce
    64. 

  64.     unneeded rebuilding when changing headers, but note that you must force rebuilds
    65. 

  65.     of files that actually need it by hand then.
    66. 

  66. 

  67. make -j<num>
    68. 

  68.     Rebuild with multiple jobs at the same time. Faster on multi processor systems.
    69. 

  69. 

  70. make -k
    71. 

  71.     Continue build in case of errors, this is useful for the regression tests
    72. 

  72.     sometimes but note that it will still not run all reg tests.
    73. 

  73.