Cristiano Di Buduo wrote on 06 May 2008 18:16:
> Hi, i'm porting a project to gcc, and it heavily relies on inline
> assembly.
>
> I have some inline functions that, when optimized, generate duplicate
> labels. So i read through the docs, and stumbled upon the %=
> functionality.
You must have been reading the gcc internals manual.
> I couldn't find more in-depth info, so i fgrepped the gcc source tree.
>
> But to no avail...
> I already tried the gcc mailing list, no response:
>
> Why does '%=' not work in code directly copied from the gcc sources?
The stuff in .md files is not inline assembly and cannot be understood by
GCC (or any other C compiler) directly. It is a plain text format that is
parsed by various utility programs that are built as part of the gcc build
process and that emit autogenerated C files that handle the cpu-dependent
parts of the assembly generation process. The "output templates" that are in
the .md files contain many kinds of syntax that cannot be used in inline
assembly, and "%=" is one of those.
cheers,
DaveK
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