Fixes#102. While on macOS the `libcompiler.a` and `libruntime.a`
files apparently get output directly into `out/Release/` by the build,
on Linux they seem to go into a subdirectory `out/Release/obj.target/`.
This causes someone who tries to follow the instructions to get an
error like
```
/usr/bin/ld: cannot find -lcompiler
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```
That looks like the setup is broken somehow, and for someone who
hasn't spent much time fixing up Unix linker errors, it doesn't give a
lot of clues as to how to fix it.
Instead, have the recommended command find the actual library file
directly, and pass that to the linker. (Alternatively we could have
passed the containing directory to `-L`; this is a little shorter, and
of course neither version is what you'd want in an industrial-strength
build recipe.)
This isn't the world's most elegant solution, obviously -- it'd be
better (at least as far as this part is concerned) to have the layout
be the same on different platforms. But doing that sounds likely to
require significant messing around with build scripts, so this at
least makes the instructions work reliably.
Some linkers (among them, the GNU ld 2.28 on my laptop, which clang
relies on for linking) are picky about the order they get their
ingredients in on the command line. When they are, they want the
leaf nodes (like your `main` function) first, and the dependencies
(like `libcompiler.a`) after.
It's kind of counterintuitive (at least to me) that this is the
preferred order, though I can understand it from the perspective
of efficient resource use in the era when some linkers were first
written. Anyway, it's the way it is. There's a detailed
explanation here:
https://stackoverflow.com/a/409470/378130
So, adjust the examples in the README to an order that should
work everywhere.
This fixes part of #102.
The links to http://harmonia.cs.berkeley.edu got to a "forbidden, you' dont have permission to access..." error page. I have updated "Efficient and Flexible Incremental Parsing" to point to the ftp location on berkeley.edu. The only hosted reference to "Incremental Analysis of Real Programming Languages" is at ACM Digital Library, I pointed the link here.
