toolchain/54027: enabling real libstdc++ gnu.ver config.h processing has duplicate symbols

[mrg%eterna.com.au@localhost]

>Number:         54027
>Category:       toolchain
>Synopsis:       enabling real libstdc++ gnu.ver config.h processing has duplicate symbols
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 01 05:50:00 +0000 2019
>Originator:     matthew green
>Release:        NetBSD 8.99.34
>Organization:
people's front against (bozotic) www (softwar foundation)
>Environment:
All
>Description:
	
	the current libstdc++.so linking attempts to use the c++config.h
	but it uses the wrong one, and ends up not having right checks
	applied.  i've fixed mknative-gcc to copy the un-processed
	config.h as symver-config.h, but i need this patch to enable the
	use of it as well:

Index: external/gpl3/gcc/dist/libstdc++-v3/config/abi/pre/gnu.ver
===================================================================
RCS file: /cvsroot/src/external/gpl3/gcc/dist/libstdc++-v3/config/abi/pre/gnu.ver,v
retrieving revision 1.1.1.6
diff -p -u -u -r1.1.1.6 gnu.ver
-
+++ external/gpl3/gcc/dist/libstdc++-v3/config/abi/pre/gnu.ver	1 Mar 2019 05:25:06 -0000
@@ -1007,7 +1007,10 @@ GLIBCXX_3.4 {
 #ifdef HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT
    # GLIBCXX_ABI compatibility only.
     # std::string
+    # XXXMRG this causes dupe symbols on netbsd
+#if 0
     _ZNKSs11_M_disjunctEPKc;
+#endif
     _ZNKSs15_M_check_lengthE[jmy][jmy]PKc;
     _ZNSs4_Rep26_M_set_length_and_sharableE*;
     _ZNSs7_M_copyEPcPKc[jmy];
@@ -1015,7 +1018,10 @@ GLIBCXX_3.4 {
     _ZNSs9_M_assignEPc[jmy]c;
 
     # std::wstring
+    # XXXMRG this causes dupe symbols on netbsd
+#if 0
     _ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw;
+#endif
     _ZNKSbIwSt11char_traitsIwESaIwEE15_M_check_lengthE[jmy][jmy]PKc;
     _ZNSbIwSt11char_traitsIwESaIwEE4_Rep26_M_set_length_and_sharableE*;
     _ZNSbIwSt11char_traitsIwESaIwEE7_M_copyEPwPKw[jmy];

>How-To-Repeat:

	i plan to commit the above change and the processing, but we
	should figure out why this is happening.

>Fix: