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- FFmpeg currently uses a custom build system, this text attempts to document
- some of its obscure features and options.
-
- Makefile variables:
-
- V
- Disable the default terse mode, the full command issued by make and its
- output will be shown on the screen.
-
- DBG
- Preprocess x86 external assembler files to a .dbg.asm file in the object
- directory, which then gets compiled. Helps in developing those assembler
- files.
-
- DESTDIR
- Destination directory for the install targets, useful to prepare packages
- or install FFmpeg in cross-environments.
-
- GEN
- Set to ‘1’ to generate the missing or mismatched references.
-
- Makefile targets:
-
- all
- Default target, builds all the libraries and the executables.
-
- fate
- Run the fate test suite, note that you must have installed it.
-
- fate-list
- List all fate/regression test targets.
-
- install
- Install headers, libraries and programs.
-
- examples
- Build all examples located in doc/examples.
-
- checkheaders
- Check headers dependencies.
-
- alltools
- Build all tools in tools directory.
-
- config
- Reconfigure the project with the current configuration.
-
- tools/target_dec_<decoder>_fuzzer
- Build fuzzer to fuzz the specified decoder.
-
- tools/target_bsf_<filter>_fuzzer
- Build fuzzer to fuzz the specified bitstream filter.
-
- Useful standard make commands:
- make -t <target>
- Touch all files that otherwise would be built, this is useful to reduce
- unneeded rebuilding when changing headers, but note that you must force rebuilds
- of files that actually need it by hand then.
-
- make -j<num>
- Rebuild with multiple jobs at the same time. Faster on multi processor systems.
-
- make -k
- Continue build in case of errors, this is useful for the regression tests
- sometimes but note that it will still not run all reg tests.
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