To handle ports where we might arrange to use different sets of fixed headers for different multilibs.
This has been used in gcc-9 based production compilers for several targets
for a year, passed a build & test sequence for powerpc-vxworks7 with gcc-10
and a sanity check build with a recent mainline.
Olivier
2020-09-24 Olivier Hainque <hain...@adacore.com>
* libgcc/config/t-vxworks (LIBGCC2_INCLUDES): Append
$(MULTISUBDIR) to the -I path for fixed headers.
0004-Honor-MULTISUBDIR-in-I-directives-for-libgcc-on-VxWo.diff
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