From db911197a051c678d671348fa9bb4a8ddfeb8577 Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Tue, 7 Dec 2021 14:21:52 -0500
Subject: [PATCH] libroot: Force __cxa_pure_virtual to be linked in.

In GCC 8 builds it is by default, in GCC 11 builds it is weakly
defined, which runtime_loader does not yet support properly,
so we force it to be included.
---
 src/system/libroot/Jamfile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/system/libroot/Jamfile b/src/system/libroot/Jamfile
index 1297bb1fc1..4d7970bef2 100644
--- a/src/system/libroot/Jamfile
+++ b/src/system/libroot/Jamfile
@@ -77,6 +77,12 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 		SetVersionScript $(libroot) : libroot_versions ;
 		SetVersionScript $(librootDebug) : libroot_versions ;
 
+		if $(architecture) != x86_gcc2 {
+			# force __cxa_pure_virtual to be linked instead of weak
+			# TODO: remove once we handle weak symbols correctly!
+			LINKFLAGS on $(libroot) += -Wl,-u,__cxa_pure_virtual ;
+		}
+
 		SharedLibrary $(libroot)
 			:
 			libroot_init.c