From: John Ericson <git@JohnEricson.me>
Subject: [PATCH] libatomic: Do not install into the toplevel gcc objdir

GCC 16 added an `all-local` hook that copies `libatomic.la` into
`../../gcc/`, so that the compiler being built in the same object tree can
link `-latomic`.  There is no such tree here: each runtime library is built
on its own, against an already-finished compiler, which is given the library
through the wrapper instead.  The rule just fails:

    install: cannot create regular file '/build/build/../../gcc/libatomic.so.1.2.0'

Drop the hook rather than the rule, so the difference from upstream stays as
small as possible.
---
diff --git a/libatomic/Makefile.am b/libatomic/Makefile.am
index 49689d451..c389e8cd6 100644
--- a/libatomic/Makefile.am
+++ b/libatomic/Makefile.am
@@ -181,7 +181,6 @@ all-multi: $(libatomic_la_LIBADD)
 # from $gcc_objdir seems to fix the issue.
 
 gcc_objdir = `pwd`/$(MULTIBUILDTOP)../../gcc/
-all-local: stmp-libatomic
 stmp-libatomic: libatomic.la
 	$(LIBTOOL) --mode=install $(INSTALL_DATA) libatomic.la $(gcc_objdir)$(MULTISUBDIR)/
 if LIBAT_BUILD_ASNEEDED_SOLINK