Blame SOURCES/0008-testsuite-build-plugins-with-std-c-11.patch

a46658
From 16694079a3f415f5e5683b0afe6978810ac259b1 Mon Sep 17 00:00:00 2001
a46658
From: David Malcolm <dmalcolm@redhat.com>
a46658
Date: Tue, 31 Aug 2021 17:01:05 -0400
a46658
Subject: [PATCH 08/17] testsuite: build plugins with -std=c++11
a46658
a46658
Various testsuite plugins fail when built within DTS with e.g.:
a46658
  cc1: error: cannot load plugin ./diagnostic_plugin_test_paths.so: /builddir/build/BUILD/gcc-11.1.1-20210623/obj-x86_64-redhat-linux/x86_64-redhat-linux/libstdc++-v3/src/.libs/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ./diagnostic_plugin_test_paths.so)
a46658
a46658
These turn out to C++14's sized deletion
a46658
(see https://en.cppreference.com/w/cpp/memory/new/operator_delete):
a46658
a46658
   14: 0000000000000000      0 FUNC    GLOBAL DEFAULT    UNDEF _ZdlPvm@CXXABI_1.3.9 (4)
a46658
   48: 0000000000000000      0 FUNC    GLOBAL DEFAULT    UNDEF _ZdlPvm@CXXABI_1.3.9
a46658
   14: 0000000000000000      0 FUNC    GLOBAL DEFAULT    UNDEF operator delete(void*, unsigned long)@CXXABI_1.3.9 (4)
a46658
   48: 0000000000000000      0 FUNC    GLOBAL DEFAULT    UNDEF operator delete(void*, unsigned long)@CXXABI_1.3.9
a46658
a46658
Looks like plugin.exp is building the test plugins against the
a46658
freshly-built libstdc++, and then trying to dynamically load them
a46658
against the system libstdc++.
a46658
a46658
This patch forces the use of -std=c++11 when building these test plugins,
a46658
to sidestep the problem.
a46658
---
a46658
 gcc/testsuite/lib/plugin-support.exp | 2 +-
a46658
 1 file changed, 1 insertion(+), 1 deletion(-)
a46658
a46658
diff --git a/gcc/testsuite/lib/plugin-support.exp b/gcc/testsuite/lib/plugin-support.exp
a46658
index 6d651901e..9943dbb37 100644
a46658
--- a/gcc/testsuite/lib/plugin-support.exp
a46658
+++ b/gcc/testsuite/lib/plugin-support.exp
a46658
@@ -103,7 +103,7 @@ proc plugin-test-execute { plugin_src plugin_tests } {
a46658
 	}
a46658
 	set optstr [concat $optstr "-DIN_GCC -fPIC -shared -fno-rtti -undefined dynamic_lookup"]
a46658
     } else {
a46658
-	set plug_cflags $PLUGINCFLAGS 
a46658
+	set plug_cflags "$PLUGINCFLAGS -std=c++11"
a46658
 	set optstr "$includes $extra_flags -DIN_GCC -fPIC -shared -fno-rtti"
a46658
     }
a46658
 
a46658
-- 
a46658
2.31.1
a46658