[PATCH] Add missing exports for symbols used by directory iterators

[Jonathan Wakely]

	* config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
	__shared_ptr instantiations used by gcc4-compatible ABI.

Tested x86_64-linux, committed to trunk.

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commit b50b2bf26eef0e87014c19991bebfa9b75c2b754
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Jan 29 00:19:59 2019 +0000

    Add missing exports for symbols used by directory iterators
    
            * config/abi/pre/gnu.ver (GLIBCXX_3.4.26): Add missing exports for
            __shared_ptr instantiations used by gcc4-compatible ABI.

diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index 34c70b6cb8f..a0860668b90 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -2225,6 +2225,12 @@ GLIBCXX_3.4.26 {
     _ZNSt10filesystem7__cxx1128recursive_directory_iteratoraSEOS1_;
     _ZNSt10filesystem7__cxx1128recursive_directory_iteratorppEv;
 
+    _ZNSt12__shared_ptrINSt10filesystem4_DirELN9__gnu_cxx12_Lock_policyE2EEC1Ev;
+    _ZNSt12__shared_ptrINSt10filesystem4_DirELN9__gnu_cxx12_Lock_policyE2EEC1EOS4_;
+    _ZNSt12__shared_ptrINSt10filesystem4_DirELN9__gnu_cxx12_Lock_policyE2EEaSEOS4_;
+    _ZNSt12__shared_ptrINSt10filesystem28recursive_directory_iterator10_Dir_stackELN9__gnu_cxx12_Lock_policyE2EEC1Ev;
+    _ZNSt12__shared_ptrINSt10filesystem28recursive_directory_iterator10_Dir_stackELN9__gnu_cxx12_Lock_policyE2EEC1EOS5_;
+
     _ZNSt12__shared_ptrINSt10filesystem7__cxx114_DirELN9__gnu_cxx12_Lock_policyE2EEC1Ev;
     _ZNSt12__shared_ptrINSt10filesystem7__cxx114_DirELN9__gnu_cxx12_Lock_policyE2EEC1EOS5_;
     _ZNSt12__shared_ptrINSt10filesystem7__cxx114_DirELN9__gnu_cxx12_Lock_policyE2EEaSEOS5_;