[gcc r10-10190] libstdc++: Install GDB pretty printers for debug library

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:537434fd547a023e14f511c27598263c7148b4dd

commit r10-10190-g537434fd547a023e14f511c27598263c7148b4dd
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Aug 12 19:56:14 2021 +0100

    libstdc++: Install GDB pretty printers for debug library
    
    The additional libraries installed by --enable-libstdcxx-debug are built
    without optimization to aid debugging, but the Python pretty printers
    are not installed alongside them. This means that you can step through
    the unoptimized library code, but at the expense of pretty printing the
    library types.
    
    This remedies the situation by installing another copy of the GDB hooks
    alongside the debug version of libstdc++.so.
    
    Signed-off-by: Jonathan Wakely <jwakely@redhat.com>
    
    libstdc++-v3/ChangeLog:
    
            * python/Makefile.am [GLIBCXX_BUILD_DEBUG] (install-data-local):
            Install another copy of the GDB hook.
            * python/Makefile.in: Regenerate.
    
    (cherry picked from commit db853ff78a34fef25bc16133e0367a64526f9f4e)

Diff:
---
 libstdc++-v3/python/Makefile.am | 12 +++++++++++-
 libstdc++-v3/python/Makefile.in |  8 +++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/python/Makefile.am b/libstdc++-v3/python/Makefile.am
index 32fc2e4c88b..d56f072b3b6 100644
--- a/libstdc++-v3/python/Makefile.am
+++ b/libstdc++-v3/python/Makefile.am
@@ -29,6 +29,12 @@ else
 pythondir = $(datadir)/gcc-$(gcc_version)/python
 endif
 
+if GLIBCXX_BUILD_DEBUG
+debug_gdb_py = YES
+else
+debug_gdb_py =
+endif
+
 all-local: gdb.py
 
 nobase_python_DATA = \
@@ -53,4 +59,8 @@ install-data-local: gdb.py
 		  $(DESTDIR)$(toolexeclibdir)/libstdc++.la`; \
 	fi; \
 	echo " $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py"; \
-	$(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py
+	$(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py ; \
+	if [ -n "$(debug_gdb_py)" ]; then \
+	  sed "/^libdir = /s;'$$;/debug';" gdb.py > debug-gdb.py ; \
+	  $(INSTALL_DATA) debug-gdb.py $(DESTDIR)$(toolexeclibdir)/debug/$$libname-gdb.py ; \
+	fi
diff --git a/libstdc++-v3/python/Makefile.in b/libstdc++-v3/python/Makefile.in
index 7200a761457..0955a44478a 100644
--- a/libstdc++-v3/python/Makefile.in
+++ b/libstdc++-v3/python/Makefile.in
@@ -398,6 +398,8 @@ WARN_CXXFLAGS = \
 AM_CPPFLAGS = $(GLIBCXX_INCLUDES) $(CPPFLAGS)
 @ENABLE_PYTHONDIR_FALSE@pythondir = $(datadir)/gcc-$(gcc_version)/python
 @ENABLE_PYTHONDIR_TRUE@pythondir = $(prefix)/$(python_mod_dir)
+@GLIBCXX_BUILD_DEBUG_FALSE@debug_gdb_py = 
+@GLIBCXX_BUILD_DEBUG_TRUE@debug_gdb_py = YES
 nobase_python_DATA = \
     libstdcxx/v6/printers.py \
     libstdcxx/v6/xmethods.py \
@@ -609,7 +611,11 @@ install-data-local: gdb.py
 		  $(DESTDIR)$(toolexeclibdir)/libstdc++.la`; \
 	fi; \
 	echo " $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py"; \
-	$(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py
+	$(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py ; \
+	if [ -n "$(debug_gdb_py)" ]; then \
+	  sed "/^libdir = /s;'$$;/debug';" gdb.py > debug-gdb.py ; \
+	  $(INSTALL_DATA) debug-gdb.py $(DESTDIR)$(toolexeclibdir)/debug/$$libname-gdb.py ; \
+	fi
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.