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# The arm-stmos toolchain
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A special binutils/gcc toolchain is necessary to build stmos and associated
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programs. For convenience, a bash script has been written to attempt to automate
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the majority of the compilation/installation process. This process is based of
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off various tutorials from [osdev.org](https://wiki.osdev.org).
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Some programs are required for the build process. A list can be found [here](https://wiki.osdev.org/GCC_Cross-Compiler#Installing_Dependencies). Once
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installed, just run the script:
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```
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./create-toolchain.sh
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```
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It should be safe to re-run the script, if necessary.
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After successful installation, be sure to add the toolchain to your path ($HOME
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/arm-stmos/bin). Then, follow these steps to build pdclib and the crt0:
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* Cd to src/pdclib
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* Make sure the Makefile does not have the ```-g``` flag set under CFLAGS
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* Build pdclib (make)
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* Copy pdclib.a to ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/libc.a
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* Add the ```-g``` flag to CFLAGS in the Makefile; Rebuild pdclib
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* Copy pdclib.a to ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/libg.a
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* Cd to the stmos root directory; run ```make crt```
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* Copy crt0.o ~/arm-stmos/lib/gcc/arm-stmos/8.2.0/crt0.o
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Now everything should be ready. Build stmos, run it, hope it works.
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