SPDX-FileCopyrightText: 2023 Samuel Tyler <samuel@samuelt.me>

SPDX-License-Identifier: GPL-3.0-or-later

Two fold issue.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63966
Pre-5.0 GCC does not have a cpuid.h header installed on the system, so
we use the one from this source tree.

https://stackoverflow.com/questions/22160093/inconsistent-operand-constraints-in-an-asm
Pre-5.0 GCC does not support PIC inline ASM that touches ebx (as
presumably the cpuid call does); so we must disable PIC.

--- gcc-10.5.0/libgcc/Makefile.in	2023-01-25 16:03:45.928059755 +1100
+++ gcc-10.5.0/libgcc/Makefile.in	2023-01-25 16:04:06.711464255 +1100
@@ -282,7 +282,7 @@
 # subdirectory rather than in the source directory.
 # -I$(@D) and -I$(srcdir)/$(@D) cause the subdirectory of the file
 # currently being compiled, in both source trees, to be examined as well.
-INCLUDES = -I. -I$(@D) -I$(gcc_objdir) \
+INCLUDES = -I. -I$(@D) -I$(gcc_objdir) -I../../gcc/include -fno-pic \
 	   -I$(srcdir) -I$(srcdir)/$(@D) -I$(srcdir)/../gcc \
 	   -I$(srcdir)/../include $(DECNUMINC)
 
