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# Being a Hush Developer
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## Compiling Hush
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Normal compiling is as simple as:
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./zcutil/build.sh
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To make it use as many CPU threads as you have:
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./zcutil/build.sh -j$(nproc) # assumes linux
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./zcutil/build.sh -j8 # use a fixed 8 threads, more portable
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## Good Hygiene
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To avoid weirld build system issues, it's often good to run:
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make clean
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*before* you switch Git branches. Otherwise, the new branches Makefiles
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often are incompatible and `make clean` will be impossible, which can
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sometimes introduce weird bugs or make compiling really annoying.
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## Switching branches
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Switching branches and doing partial compiles in Komodo/Hush source code
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can introduce weird bugs, which are fixed by running `build.sh` again.
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When in doubt, if you run into a compile error, especially if it mentions
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`OCTET_STRING`, run `build.sh` again. Running `make clean` before switching
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branches can often prevent those problems.
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```
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cryptoconditions/src/asn/SimpleSha256Condition.h:14:10: fatal error: OCTET_STRING.h: No such file or directory
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```
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## Partial compiles
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At any point, you can modify hush source code and then use `make` or `build.sh`
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to do a partial compile. The first is faster but the latter is more likely to
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work correctly in all circustances. Sometimes partial compiles break weird
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build system dependencies, and you must do a `make clean` first, or even
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`git clean -fdx` (look up what it means first!) to clean things. The nuclear
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option is to re-clone the repo, which sometimes is the least work to fix
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the problem.
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## Generating new unix man pages
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Make sure that you have updated all version numbers in hushd and compiled, then
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to generate new unix man pages for that version :
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./contrib/devtools/gen-manpages.sh
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## Generating new debian packages
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After successfully compiling Hush, you can generate a debian package of these binaries with:
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./zcutil/build-debian-package.sh
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This command will not work on Mac OS X. Currently you cannot generate a Debian package
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from operating systems other than Linux.
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