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39 lines
1.8 KiB
Text
39 lines
1.8 KiB
Text
==how to port to a new platform==
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0) generate voc.par file for the target platform(if it does not exist in src/par).
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you can do it by compiling vocparam, and running it as "./vocparam > voc.par"
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1) generate voc, ocat, showdef source for target platform by running
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make -f makefile.gcc.<arch> port0
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(or copy corresponding voc.par to the source directory yourself, remove stage2 from port0 section of the makefile, and run make port0)
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2) transfer source to a target platform and write
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make port1
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(or use a crosscompiler)
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now you have voc, showdef, and ocat binaries for your target platform
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3) cp voc vocstatic
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make -f makefile for your target.
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that's how I've done x86 port.
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voc was originally run on x86_64.
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notes** in practice everything is not always simple, because you may need to edit Unix.Mod, Args.Mod and SYSTEM.h, and put them to src/lib/system/gcc/<yourtarget>, and create new makefile for your target.
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==how to add a new option==
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define it in OPM as a constant before defopt is defined.
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define a BOOLEAN variable in OPM which will describe if setting is set.
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add handling of a new option in OPM.ScanOptions
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set your BOOLEAN value in OPM.OpenPari (or in ScanOptions, after the CASE) so you can check it later.
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check your boolean when necessary, (see useParFile in OPM.GetOptions)
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add it in OPC.GenHeaderMsg function.
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==known bugs==
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when using SYSTEM.LSH(s, n) where s is SET,
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c compiler generates an error like
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"error: duplicate 'unsigned'",
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that's because SET is defined as unsigned in SYSTEM.h,
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while LSH is defined in SYSTEM.h as ((t)((unsigned t)(x)<<(n))),
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and it makes not possible to make SYSTEM.LSH with type SET.
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I don't want to prohibit it at the parser level
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because C backend is only one of possible backends.
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The solution currently is to cast set type to longint before lsh-ing it.
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And then casting it back to set if necessary.
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