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-rw-r--r--meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.2/0014-optional-libstdc.patch125
1 files changed, 125 insertions, 0 deletions
diff --git a/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.2/0014-optional-libstdc.patch b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.2/0014-optional-libstdc.patch
new file mode 100644
index 0000000..44b0cc7
--- /dev/null
+++ b/meta-linaro-toolchain/recipes-devtools/gcc/gcc-linaro-6.2/0014-optional-libstdc.patch
@@ -0,0 +1,125 @@
+From 36275f7981bdaf919bbc9b51a7c7fae1e192adb3 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 14/46] optional libstdc
+
+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++.
+
+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
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Inappropriate [embedded specific]
+---
+ 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(-)
+
+diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
+index 4f86876..660da6c 100644
+--- a/gcc/c-family/c.opt
++++ b/gcc/c-family/c.opt
+@@ -1647,6 +1647,10 @@ nostdinc++
+ C++ ObjC++
+ Do not search standard system include directories for C++.
+
++nostdlib++
++Driver
++Do not link standard C++ runtime library
++
+ 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 03cbde0..3642540 100644
+--- a/gcc/cp/g++spec.c
++++ b/gcc/cp/g++spec.c
+@@ -137,6 +137,7 @@ lang_specific_driver (struct cl_decoded_option **in_decoded_options,
+ switch (decoded_options[i].opt_index)
+ {
+ case OPT_nostdlib:
++ case OPT_nostdlib__:
+ case OPT_nodefaultlibs:
+ library = -1;
+ break;
+diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
+index 8bb49e7..84d68aa 100644
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -207,6 +207,9 @@ 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
+ -Wabi=@var{n} -Wabi-tag -Wconversion-null -Wctor-dtor-privacy @gol
+ -Wdelete-non-virtual-dtor -Wliteral-suffix -Wmultiple-inheritance @gol
+@@ -470,7 +473,7 @@ Objective-C and Objective-C++ Dialects}.
+ -s -static -static-libgcc -static-libstdc++ @gol
+ -static-libasan -static-libtsan -static-liblsan -static-libubsan @gol
+ -static-libmpx -static-libmpxwrappers @gol
+--shared -shared-libgcc -symbolic @gol
++-shared -shared-libgcc -symbolic -nostdlib++ @gol
+ -T @var{script} -Wl,@var{option} -Xlinker @var{option} @gol
+ -u @var{symbol} -z @var{keyword}}
+
+@@ -10601,6 +10604,33 @@ library subroutines.
+ constructors are called; @pxref{Collect2,,@code{collect2}, gccint,
+ GNU Compiler Collection (GCC) Internals}.)
+
++@item -nostdlib++
++@opindex nostdlib++
++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 position independent executable on targets that support it.
+diff --git a/gcc/gcc.c b/gcc/gcc.c
+index 4cfef7f..da0b482 100644
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -1028,6 +1028,7 @@ proper position among the other output files. */
+ %(mflib) " STACK_SPLIT_SPEC "\
+ %{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
+ %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
++ %{!nostdlib++:}\
+ %{!nostdlib:%{!nostartfiles:%E}} %{T*} \n%(post_link) }}}}}}"
+ #endif
+
+--
+2.8.2
+