https://sourceware.org/git/?p=valgrind.git;a=commit;h=1dbc46750f7f716ae3b9cf718380df77422379da
https://bugs.gentoo.org/869320

From: Paul Floyd <pjfloyd@wanadoo.fr>
Date: Tue, 19 Apr 2022 22:03:01 +0200
Subject: [PATCH] Bug 452779 Valgrind fails to build on FreeBSD 13.0 with
 llvm-devel (15.0.0)

This fixes building.

I may make the -lgcc and libgcc-sup conditonal on not using clang later.
--- a/Makefile.tool.am
+++ b/Makefile.tool.am
@@ -16,14 +16,14 @@ TOOL_DEPENDENCIES_@VGCONF_PLATFORM_SEC_CAPS@ = \
 	$(top_builddir)/VEX/libvex-@VGCONF_ARCH_SEC@-@VGCONF_OS@.a
 endif
 
-
-TOOL_LDADD_COMMON = -lgcc \
-	$(top_builddir)/coregrind/libgcc-sup-@VGCONF_ARCH_PRI@-@VGCONF_OS@.a
+TOOL_LDADD_COMMON = -lgcc
 TOOL_LDADD_@VGCONF_PLATFORM_PRI_CAPS@ = \
-	$(TOOL_DEPENDENCIES_@VGCONF_PLATFORM_PRI_CAPS@) $(TOOL_LDADD_COMMON)
+	$(TOOL_DEPENDENCIES_@VGCONF_PLATFORM_PRI_CAPS@) $(TOOL_LDADD_COMMON) \
+	$(top_builddir)/coregrind/libgcc-sup-@VGCONF_ARCH_PRI@-@VGCONF_OS@.a
 if VGCONF_HAVE_PLATFORM_SEC
 TOOL_LDADD_@VGCONF_PLATFORM_SEC_CAPS@ = \
-	$(TOOL_DEPENDENCIES_@VGCONF_PLATFORM_SEC_CAPS@) $(TOOL_LDADD_COMMON)
+	$(TOOL_DEPENDENCIES_@VGCONF_PLATFORM_SEC_CAPS@) $(TOOL_LDADD_COMMON) \
+	$(top_builddir)/coregrind/libgcc-sup-@VGCONF_ARCH_SEC@-@VGCONF_OS@.a
 endif