pas2CTutorial.wiki
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#labels Phase-Implementation
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==Automatic==
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Configure with `cmake -DBUILD_ENGINE_C=1` and then run `make`.
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==Manual run==
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Run from the `tools` folder
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{{{
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ghc -e pas2C \"hwengine\"" pas2c.hs
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}}}
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You can replace "hwengine" with any other module.
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Every pas file will be converted to a .c/.h version in the `hedgewars` folder. In case no output is produced something has gone wrong.
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Use `clang` to compile, `gcc` compatibility is not yet achieved. We are curious to hear about `icc` and `msvc` (not that we expect anything...)
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==Development==
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There are some special file that you need to know
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  * project_files/hwc/rtl/fpcrtl.h - contains definitions of external functions defined inside custom pascal units (eg SDLh.pas);
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  * hedgewars/pas2cSystem.pas - contains definitions of external functions defined outside our own pascal units (eg png and gl units, bundled with freepascal);
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  * hedgewars/pas2cRedo.pas - contains definitions of internal fpc units (provided by the 'rtl') which get a fpcrtl_ prefix.
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If you need to hide portions of code from pas2c just wrap it with `${IFNDEF PAS2C}...{$ENDIF}`