gcc: Update patches submitted/merged upstream

I took 5 of our patches and submitted to upstream gcc. This highlighted that
patches 0026 and 0018 should be merged together and some tweaks were made to
try and make it acceptable to upstream. The other patches have their headers
updated to match what was submitted.

The libstdc++ option patch was also cleaned up ready for upstream as the
documentation wasn't quite right.

The CXXFLAGS_FOR_BUILD piece of 0026 is separated out into a new patch which
can be submitted separately to upstream.

Two of the patches have been merged, status updated accordinly.

(From OE-Core rev: df9b8ec56ff29f14feb1fde6acbdf9c4667430cf)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 58 insertions, 62 deletions

diff --git a/meta/recipes-devtools/gcc/gcc/0005-optional-libstdc.patch b/meta/recipes-devtools/gcc/gcc/0005-optional-libstdc.patch
index c921ac3340..b856c5dea3 100644
--- a/meta/recipes-devtools/gcc/gcc/0005-optional-libstdc.patch
+++ b/meta/recipes-devtools/gcc/gcc/0005-optional-libstdc.patch
@@ -1,34 +1,54 @@
-From 57e2c5e35732988c0b287289eb0997b4e9769371 Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 09:12:56 +0400
-Subject: [PATCH] optional libstdc
+From: Richard Purdie <richard.purdie@linuxfoundation.org>
+Subject: [PATCH 3/5] gcc: Add --nostdlib++ option
 
-gcc-runtime builds libstdc++ separately from gcc-cross-*. Its configure tests using g++
+[gcc-runtime builds libstdc++ separately from gcc-cross-*. Its configure tests using g++
 will not run correctly since by default the linker will try to link against libstdc++
 which shouldn't exist yet. We need an option to disable -lstdc++
 option whilst leaving -lc, -lgcc and other automatic library dependencies added by gcc
-driver. This patch adds such an option which only disables the -lstdc++.
+driver. This patch adds such an option which only disables the -lstdc++.]
 
-A "standard" gcc build uses xgcc and hence avoids this. We should ask upstream how to
-do this officially, the likely answer is don't build libstdc++ separately.
+[A "standard" gcc build uses xgcc and hence avoids this. We should ask upstream how to
+do this officially, the likely answer is don't build libstdc++ separately.]
 
-RP 29/6/10
+OpenEmbedded/Yocto Project builds libgcc and the other gcc runtime libraries
+separately from the compiler and slightly differently to the standard gcc build.
 
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
+In general this works well but in trying to build them separately we run into
+an issue since we're using our gcc, not xgcc and there is no way to tell configure
+to use libgcc but not look for libstdc++.
 
-Upstream-Status: Inappropriate [embedded specific]
+This adds such an option allowing such configurations to work.
+
+2021-10-26 Richard Purdie <richard.purdie@linuxfoundation.org>
+
+gcc/c-family/ChangeLog:
+
+    * c.opt: Add --nostdlib++ option
+
+gcc/cp/ChangeLog:
+
+    * g++spec.c (lang_specific_driver): Add --nostdlib++ option
+
+gcc/ChangeLog:
+
+    * doc/invoke.texi: Document --nostdlib++ option
+    * gcc.c: Add --nostdlib++ option
+
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Upstream-Status: Submitted [https://gcc.gnu.org/pipermail/gcc-patches/2021-October/582724.html]
 ---
- gcc/c-family/c.opt  |  4 ++++
- gcc/cp/g++spec.c    |  1 +
- gcc/doc/invoke.texi | 32 +++++++++++++++++++++++++++++++-
- gcc/gcc.c           |  1 +
- 4 files changed, 37 insertions(+), 1 deletion(-)
+ gcc/c-family/c.opt  | 4 ++++
+ gcc/cp/g++spec.c    | 1 +
+ gcc/doc/invoke.texi | 8 +++++++-
+ gcc/gcc.c           | 1 +
+ 4 files changed, 13 insertions(+), 1 deletion(-)
 
-diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
-index 64e46e7573e..1824380f27a 100644
---- a/gcc/c-family/c.opt
-+++ b/gcc/c-family/c.opt
-@@ -2166,6 +2166,10 @@ nostdinc++
+Index: gcc-11.2.0/gcc/c-family/c.opt
+===================================================================
+--- gcc-11.2.0.orig/gcc/c-family/c.opt
++++ gcc-11.2.0/gcc/c-family/c.opt
+@@ -2153,6 +2153,10 @@ nostdinc++
  C++ ObjC++
  Do not search standard system include directories for C++.
  
@@ -39,11 +59,11 @@ index 64e46e7573e..1824380f27a 100644
  o
  C ObjC C++ ObjC++ Joined Separate
  ; Documented in common.opt
-diff --git a/gcc/cp/g++spec.c b/gcc/cp/g++spec.c
-index 3c9bd1490b4..818beb61cee 100644
---- a/gcc/cp/g++spec.c
-+++ b/gcc/cp/g++spec.c
-@@ -159,6 +159,7 @@ lang_specific_driver (struct cl_decoded_option **in_decoded_options,
+Index: gcc-11.2.0/gcc/cp/g++spec.c
+===================================================================
+--- gcc-11.2.0.orig/gcc/cp/g++spec.c
++++ gcc-11.2.0/gcc/cp/g++spec.c
+@@ -159,6 +159,7 @@ lang_specific_driver (struct cl_decoded_
        switch (decoded_options[i].opt_index)
         {
         case OPT_nostdlib:
@@ -51,21 +71,19 @@ index 3c9bd1490b4..818beb61cee 100644
         case OPT_nodefaultlibs:
           library = -1;
           break;
-diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
-index 6659a903bf0..9ee63dbe52f 100644
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -239,6 +239,9 @@ in the following sections.
+Index: gcc-11.2.0/gcc/doc/invoke.texi
+===================================================================
+--- gcc-11.2.0.orig/gcc/doc/invoke.texi
++++ gcc-11.2.0/gcc/doc/invoke.texi
+@@ -239,6 +239,7 @@ in the following sections.
  -fno-weak  -nostdinc++ @gol
  -fvisibility-inlines-hidden @gol
  -fvisibility-ms-compat @gol
-+-fvtable-verify=@r{[}std@r{|}preinit@r{|}none@r{]} @gol
-+-fvtv-counts -fvtv-debug @gol
 +-nostdlib++ @gol
  -fext-numeric-literals @gol
  -flang-info-include-translate@r{[}=@var{header}@r{]} @gol
  -flang-info-include-translate-not @gol
-@@ -632,7 +635,7 @@ Objective-C and Objective-C++ Dialects}.
+@@ -632,7 +633,7 @@ Objective-C and Objective-C++ Dialects}.
  -pie  -pthread  -r  -rdynamic @gol
  -s  -static  -static-pie  -static-libgcc  -static-libstdc++ @gol
  -static-libasan  -static-libtsan  -static-liblsan  -static-libubsan @gol
@@ -74,7 +92,7 @@ index 6659a903bf0..9ee63dbe52f 100644
  -T @var{script}  -Wl,@var{option}  -Xlinker @var{option} @gol
  -u @var{symbol}  -z @var{keyword}}
  
-@@ -15708,6 +15711,33 @@ Specify that the program entry point is @var{entry}.  The argument is
+@@ -15721,6 +15722,11 @@ Specify that the program entry point is
  interpreted by the linker; the GNU linker accepts either a symbol name
  or an address.
  
@@ -83,36 +101,14 @@ index 6659a903bf0..9ee63dbe52f 100644
 +Do not use the standard system C++ runtime libraries when linking.
 +Only the libraries you specify will be passed to the linker.
 +
-+@cindex @option{-lgcc}, use with @option{-nostdlib}
-+@cindex @option{-nostdlib} and unresolved references
-+@cindex unresolved references and @option{-nostdlib}
-+@cindex @option{-lgcc}, use with @option{-nodefaultlibs}
-+@cindex @option{-nodefaultlibs} and unresolved references
-+@cindex unresolved references and @option{-nodefaultlibs}
-+One of the standard libraries bypassed by @option{-nostdlib} and
-+@option{-nodefaultlibs} is @file{libgcc.a}, a library of internal subroutines
-+which GCC uses to overcome shortcomings of particular machines, or special
-+needs for some languages.
-+(@xref{Interface,,Interfacing to GCC Output,gccint,GNU Compiler
-+Collection (GCC) Internals},
-+for more discussion of @file{libgcc.a}.)
-+In most cases, you need @file{libgcc.a} even when you want to avoid
-+other standard libraries.  In other words, when you specify @option{-nostdlib}
-+or @option{-nodefaultlibs} you should usually specify @option{-lgcc} as well.
-+This ensures that you have no unresolved references to internal GCC
-+library subroutines.
-+(An example of such an internal subroutine is @code{__main}, used to ensure C++
-+constructors are called; @pxref{Collect2,,@code{collect2}, gccint,
-+GNU Compiler Collection (GCC) Internals}.)
-+
  @item -pie
  @opindex pie
  Produce a dynamically linked position independent executable on targets
-diff --git a/gcc/gcc.c b/gcc/gcc.c
-index 19c75b6e20d..be7630ffd8c 100644
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -1162,6 +1162,7 @@ proper position among the other output files.  */
+Index: gcc-11.2.0/gcc/gcc.c
+===================================================================
+--- gcc-11.2.0.orig/gcc/gcc.c
++++ gcc-11.2.0/gcc/gcc.c
+@@ -1162,6 +1162,7 @@ proper position among the other output f
      %(mflib) " STACK_SPLIT_SPEC "\
      %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
      %{!nostdlib:%{!r:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}}\