[cfe-commits] [patch] -add-plugin

[Nico Weber]

Hi,

the current -plugin flag swaps out codegen for a different plugin. I'd
like to able to run plugins in addition to codegen. The attached patch
adds support for -add-plugin, which does just that.

With this, it's for example very easy to run a plugin that dumps all
toplevel declarations to a file while building by just setting
CFLAGS="-Xclang -load -Xclang path/to/my/plugin.so -Xclang -add-plugin
-Xclang myplugin" and using the normal build system of one's project
(say, make or xcodebuild) – one can write a ctags program that
supports c++ in just a few lines of code.

If the flag is not present, the patch doesn't modify the current flow
at all. And changes to existing files are small.

Nico
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