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67 lines
1.9 KiB
Markdown
67 lines
1.9 KiB
Markdown
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# Static Recompilation of IRIX Programs
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Convert selected IRIX C toolchain programs into modern Linux or macOS programs
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## Supported Programs
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* IDO 5.3
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* cc, acpp, as0, as1, cfe, copt, ugen, ujoin, uld, umerge, uopt, usplit, ld, strip, upas
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* IDO 7.1
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* cc, acpp, as0, as1, cfe, ugen, ujoin, uld, umerge, uopt, usplit, upas
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## Dependencies
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### Linux (Debian / Ubuntu)
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```bash
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sudo apt-get install build-essential
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```
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### macOS
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[Install homebrew](https://brew.sh/) and then:
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```bash
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brew install make
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```
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## Building
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First build the recomp binary itself
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```bash
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make setup
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```
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```bash
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make VERSION=5.3
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make VERSION=7.1
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```
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The build artifacts are located in `build/{7.1|5.3}/out`. Add `-j{thread num}` for multithreaded building.
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By default, debug builds are created with less optimizations, debug flags, and unstripped binaries.
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Add `RELEASE=1` to build release builds with optimizations and stripped binaries.
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### Creating Universal ARM/x86_64 macOS Builds
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By default, make build script create native binaries on macOS. This was done to minimize the time to build the recompiled suite.
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In order to create "fat," universal ARM and x86_64, pass `TARGET=universal` to `gmake`.
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### Manual Building
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Example for compiling `as1` in a Linux environment:
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```bash
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make -C tools/rabbitizer
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g++ -Itools/rabbitizer/include -Itools/rabbitizer/cplusplus/include recomp.cpp -o recomp.elf -g -Ltools/rabbitizer/build -lrabbitizerpp
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./recomp.elf ido/7.1/usr/lib/as1 > as1_c.c
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gcc libc_impl.c as1_c.c -o as1 -g -fno-strict-aliasing -lm -DIDO71
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```
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Use the same approach for `cc`, `cfe`, `uopt`, `ugen`, `as1` (and `copt` if you need that).
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Use `-DIDO53` instead of `-DIDO71` if the program you are trying to recompile was compiled with IDO 5.3 rather than IDO 7.1.
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To compile `ugen` for IDO 5.3, add `--conservative` when invoking `./recomp.elf`. This mimics UB present in `ugen53`. That program reads uninitialized stack memory and its result depends on that stack memory.
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