gcc: revert libstc++-gdb.py installation changes

Commit dbb87d in the GCC 11 branch was intended to make the installation of
this Python module more robust, but for unknown reasons the library_name
in libstdc++.la in baremetal builds (for example, Zephyr) is unset, so the
module is just installed as "-gdb.py".

This may be a GCC bug, or a bug in our build. Until that is resolved,
revert the commit to fix the packaging.

(From OE-Core rev: 61947fc024bf18b42547d2ea4cad90184132994d)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 77 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-11.1.inc b/meta/recipes-devtools/gcc/gcc-11.1.inc
index aa7ac9be59..bf29879ded 100644
--- a/meta/recipes-devtools/gcc/gcc-11.1.inc
+++ b/meta/recipes-devtools/gcc/gcc-11.1.inc
@@ -68,6 +68,7 @@ SRC_URI = "\
            file://0035-gentypes-genmodes-Do-not-use-__LINE__-for-maintainin.patch \
            file://0036-mingw32-Enable-operation_not_supported.patch \
            file://0037-libatomic-Do-not-enforce-march-on-aarch64.patch \
+           file://0001-Revert-libstdc-Install-libstdc-gdb.py-more-robustly-.patch \
 "
 SRC_URI[sha256sum] = "4c4a6fb8a8396059241c2e674b85b351c26a5d678274007f076957afa1cc9ddf"
 SRC_URI[backports.sha256sum] = "69274bebd6c069a13443d4af61070e854740a639ec4d66eedf3e80070363587b"
diff --git a/meta/recipes-devtools/gcc/gcc/0001-Revert-libstdc-Install-libstdc-gdb.py-more-robustly-.patch b/meta/recipes-devtools/gcc/gcc/0001-Revert-libstdc-Install-libstdc-gdb.py-more-robustly-.patch
new file mode 100644
index 0000000000..a3e31e4f9d
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc/0001-Revert-libstdc-Install-libstdc-gdb.py-more-robustly-.patch
@@ -0,0 +1,76 @@
+This change breaks installation on baremetal targets, so whilst the cause is
+investigated revert the commit.
+
+Upstream-Status: Inappropriate
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+From 8ec52bd0ba2141ef0bcc6f93e26a23d662b40f78 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@arm.com>
+Date: Wed, 26 May 2021 19:54:29 +0100
+Subject: [PATCH] Revert "libstdc++: Install libstdc++*-gdb.py more robustly
+ [PR 99453]"
+
+This reverts commit dbb87d6a9c37c8eca80d77782717a8144515c16d.
+---
+ libstdc++-v3/python/Makefile.am | 20 ++++++++++++++++----
+ libstdc++-v3/python/Makefile.in | 14 ++++++++++++--
+ 2 files changed, 28 insertions(+), 6 deletions(-)
+
+diff --git a/libstdc++-v3/python/Makefile.am b/libstdc++-v3/python/Makefile.am
+index 0c2b207b86e..01517a2a522 100644
+--- a/libstdc++-v3/python/Makefile.am
++++ b/libstdc++-v3/python/Makefile.am
+@@ -44,9 +44,21 @@ gdb.py: hook.in Makefile
+ install-data-local: gdb.py
+        @$(mkdir_p) $(DESTDIR)$(toolexeclibdir)
+ ## We want to install gdb.py as SOMETHING-gdb.py.  SOMETHING is the
+-## full name of the final library.  We use the libtool .la file to get
+-## the correct name.
+-       @libname=`sed -ne "/^library_names=/{s/.*='//;s/'$$//;s/ .*//;p;}" \
+-                 $(DESTDIR)$(toolexeclibdir)/libstdc++.la`; \
++## full name of the final library.  We want to ignore symlinks, the
++## .la file, and any previous -gdb.py file.  This is inherently
++## fragile, but there does not seem to be a better option, because
++## libtool hides the real names from us.
++       @here=`pwd`; cd $(DESTDIR)$(toolexeclibdir); \
++         for file in libstdc++.*; do \
++           case $$file in \
++             *-gdb.py) ;; \
++             *.la) ;; \
++             *) if test -h $$file; then \
++                  continue; \
++                fi; \
++                libname=$$file;; \
++           esac; \
++         done; \
++       cd $$here; \
+        echo " $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py"; \
+        $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py
+diff --git a/libstdc++-v3/python/Makefile.in b/libstdc++-v3/python/Makefile.in
+index 2efe0b96a19..c35dbe55961 100644
+--- a/libstdc++-v3/python/Makefile.in
++++ b/libstdc++-v3/python/Makefile.in
+@@ -607,8 +607,18 @@ gdb.py: hook.in Makefile
+ 
+ install-data-local: gdb.py
+        @$(mkdir_p) $(DESTDIR)$(toolexeclibdir)
+-       @libname=`sed -ne "/^library_names=/{s/.*='//;s/'$$//;s/ .*//;p;}" \
+-                 $(DESTDIR)$(toolexeclibdir)/libstdc++.la`; \
++       @here=`pwd`; cd $(DESTDIR)$(toolexeclibdir); \
++         for file in libstdc++.*; do \
++           case $$file in \
++             *-gdb.py) ;; \
++             *.la) ;; \
++             *) if test -h $$file; then \
++                  continue; \
++                fi; \
++                libname=$$file;; \
++           esac; \
++         done; \
++       cd $$here; \
+        echo " $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py"; \
+        $(INSTALL_DATA) gdb.py $(DESTDIR)$(toolexeclibdir)/$$libname-gdb.py
+ 
+-- 
+2.25.1
+