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53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
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This directory contains the necessary files to port the C compiler
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``LCC'' (available by FTP from sunsite.doc.ic.ac.uk in the directory
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/computing/programming/languages/c/lcc) to compile for Linux (a.out
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or ELF) by using NASM as a back-end code generator.
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This patch has been tested on lcc version 3.6.
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To install:
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- Copy `x86nasm.md' into the `src' directory of the lcc tree.
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- Copy either `lin-elf.c' or `lin-aout.c' into the `etc' directory.
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- If you're installing for a.out, edit `x86nasm.md' and change the
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conditional after the comment reading "CHANGE THIS FOR a.out" in
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the `defsymbol' function from `#if 0' to `#if 1'.
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- Make the following changes to `bind.c' in the `src' directory:
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- Near the top of the file, add a line that reads
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extern Interface x86nasmIR;
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- In the `bindings' array, add the lines
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"x86-nasm", &x86nasmIR,
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"x86/nasm", &x86nasmIR,
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(in sensible looking places...)
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A sample `bind.c' has been provided to show what the result of
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this might look like. You might be able to get away with using it
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directly...
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- Modify the lcc makefile to include rules for x86nasm.o: this will
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have to be done in about three places. Just copy any line with
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`x86' on it and modify it to read `x86nasm' everywhere. (Except
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that in the list of object files that rcc is made up from, do
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remember to ensure that every line but the last has a trailing
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backslash...)
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- You may have to modify the contents of `lin-elf.c' or `lin-aout.c'
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to reflect the true locations of files such as crt0.o, crt1.o,
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ld-linux.so and so forth. If you don't know where to find these,
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compile a short C program with `gcc -v' and see what command line
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gcc feeds to `ld'.
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- You should now be able to build lcc, using `lin-elf.c' or
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`lin-aout.c' as the system-dependent part of the `lcc' wrapper
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program.
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- Symlink x86nasm.c into the `src' directory before attempting the
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triple test, or the compile will fail.
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- Now it should pass the triple test, on either ELF or a.out. Voila!
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