[gcc r13-6657] libstdc++: Add comment about symver linker scripts to makefile

[Jonathan Wakely]

https://gcc.gnu.org/g:f50f55b8fa9bbce91fc4a56c8c1cac614520d0b4

commit r13-6657-gf50f55b8fa9bbce91fc4a56c8c1cac614520d0b4
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Mar 13 18:20:20 2023 +0000

    libstdc++: Add comment about symver linker scripts to makefile
    
    libstdc++-v3/ChangeLog:
    
            * src/Makefile.am: Add comment about linker script fragments.
            * src/Makefile.in: Regenerate.

Diff:
---
 libstdc++-v3/src/Makefile.am | 1 +
 libstdc++-v3/src/Makefile.in | 1 +
 2 files changed, 2 insertions(+)

diff --git a/libstdc++-v3/src/Makefile.am b/libstdc++-v3/src/Makefile.am
index 8cbf34a19e8..5b9af41cdb9 100644
--- a/libstdc++-v3/src/Makefile.am
+++ b/libstdc++-v3/src/Makefile.am
@@ -302,6 +302,7 @@ CXXLINK = \
 	-o $@
 
 # Symbol versioning for shared libraries.
+# See configure.host and configure.ac for port_specific_symbol_files.
 if ENABLE_SYMVERS
 libstdc++-symbols.ver:  ${glibcxx_srcdir}/$(SYMVER_FILE) \
 		$(port_specific_symbol_files)
diff --git a/libstdc++-v3/src/Makefile.in b/libstdc++-v3/src/Makefile.in
index 10fd9aa0daf..f42d957af36 100644
--- a/libstdc++-v3/src/Makefile.in
+++ b/libstdc++-v3/src/Makefile.in
@@ -1064,6 +1064,7 @@ compatibility-condvar.o: compatibility-condvar.cc
 	$(CXXCOMPILE) -std=gnu++11 -c $<
 
 # Symbol versioning for shared libraries.
+# See configure.host and configure.ac for port_specific_symbol_files.
 @ENABLE_SYMVERS_TRUE@libstdc++-symbols.ver:  ${glibcxx_srcdir}/$(SYMVER_FILE) \
 @ENABLE_SYMVERS_TRUE@		$(port_specific_symbol_files)
 @ENABLE_SYMVERS_TRUE@	cp ${glibcxx_srcdir}/$(SYMVER_FILE) $@.tmp