RE: PR target/47779 - detecting when compiling libgcc

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>Ian:
> Hmmm, yeah, that is somewhat painful.
>If you want to fix this in uClibc, that's fine with me.
>I've CC'ed Richard Sandiford to confirm.  However, it's not hard to
>imagine that, now that it works, somebody will expect to be able to use
>constants defined in insn-constants.h in ways that matter for libgcc2.c.
>So perhaps we should leave that as it is unless Richard thinks
>otherwise.

>Richard:
>Actually, it was more than that.  The idea was to allow target headers
>such as mips.h to use constants defined in .md files.  This avoided
>some cases where the same constant or enum had to appear in both.


So if I'm to go ahead and fix this in uClibc, would a reasonable fix be to...
GCC: add -D__IN_LIBGCC2 to TARGET_LIBGCC2_CFLAGS in gcc/config/bfin/t-bfin-*
uClibc: include the enum in uClibc #ifndef __IN_LIBGCC2
?

Stu




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