103 lines
3.6 KiB
Diff
103 lines
3.6 KiB
Diff
From 307c8ff3ef666b7bd5ac733863f2fbb27a9d521e Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Fri, 29 Mar 2013 09:12:56 +0400
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Subject: [PATCH 20/35] optional libstdc
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gcc-runtime builds libstdc++ separately from gcc-cross-*. Its configure tests using g++
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will not run correctly since by default the linker will try to link against libstdc++
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which shouldn't exist yet. We need an option to disable -lstdc++
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option whilst leaving -lc, -lgcc and other automatic library dependencies added by gcc
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driver. This patch adds such an option which only disables the -lstdc++.
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A "standard" gcc build uses xgcc and hence avoids this. We should ask upstream how to
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do this officially, the likely answer is don't build libstdc++ separately.
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RP 29/6/10
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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Upstream-Status: Inappropriate [embedded specific]
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---
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gcc/c-family/c.opt | 4 ++++
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gcc/cp/g++spec.c | 1 +
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gcc/doc/invoke.texi | 9 +++++++--
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gcc/gcc.c | 1 +
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4 files changed, 13 insertions(+), 2 deletions(-)
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diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
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index 10ae84d..dc3ffdf 100644
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--- a/gcc/c-family/c.opt
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+++ b/gcc/c-family/c.opt
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@@ -1299,6 +1299,10 @@ nostdinc++
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C++ ObjC++
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Do not search standard system include directories for C++
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+nostdlib++
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+Driver
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+Do not link standard C++ runtime library
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+
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o
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C ObjC C++ ObjC++ Joined Separate
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; Documented in common.opt
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diff --git a/gcc/cp/g++spec.c b/gcc/cp/g++spec.c
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index b896eea..f55216b 100644
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--- a/gcc/cp/g++spec.c
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+++ b/gcc/cp/g++spec.c
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@@ -126,6 +126,7 @@ lang_specific_driver (struct cl_decoded_option **in_decoded_options,
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switch (decoded_options[i].opt_index)
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{
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case OPT_nostdlib:
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+ case OPT_nostdlib__:
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case OPT_nodefaultlibs:
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library = -1;
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break;
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diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
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index a022622..f15c991 100644
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -190,7 +190,7 @@ in the following sections.
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-frepo -fno-rtti -fstats -ftemplate-backtrace-limit=@var{n} @gol
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-ftemplate-depth=@var{n} @gol
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-fno-threadsafe-statics -fuse-cxa-atexit -fno-weak -nostdinc++ @gol
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--fno-default-inline -fvisibility-inlines-hidden @gol
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+-nostdlib++ -fno-default-inline -fvisibility-inlines-hidden @gol
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-fvisibility-ms-compat @gol
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-fext-numeric-literals @gol
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-Wabi -Wconversion-null -Wctor-dtor-privacy @gol
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@@ -453,7 +453,7 @@ Objective-C and Objective-C++ Dialects}.
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-nostartfiles -nodefaultlibs -nostdlib -pie -rdynamic @gol
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-s -static -static-libgcc -static-libstdc++ @gol
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-static-libasan -static-libtsan @gol
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--shared -shared-libgcc -symbolic @gol
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+-shared -shared-libgcc -symbolic -nostdlib++ @gol
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-T @var{script} -Wl,@var{option} -Xlinker @var{option} @gol
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-u @var{symbol}}
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@@ -9886,6 +9886,11 @@ These entries are usually resolved by entries in
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libc. These entry points should be supplied through some other
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mechanism when this option is specified.
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+@item -nostdlib++
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+@opindex nostdlib++
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+Do not use the standard system C++ runtime libraries when linking.
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+Only the libraries you specify will be passed to the linker.
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+
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@cindex @option{-lgcc}, use with @option{-nostdlib}
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@cindex @option{-nostdlib} and unresolved references
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@cindex unresolved references and @option{-nostdlib}
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diff --git a/gcc/gcc.c b/gcc/gcc.c
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index efdb625..477752f 100644
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--- a/gcc/gcc.c
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+++ b/gcc/gcc.c
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@@ -748,6 +748,7 @@ proper position among the other output files. */
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%(mflib) " STACK_SPLIT_SPEC "\
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%{fprofile-arcs|fprofile-generate*|coverage:-lgcov} " SANITIZER_SPEC " \
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%{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
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+ %{!nostdlib++:}\
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%{!nostdlib:%{!nostartfiles:%E}} %{T*} }}}}}}"
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#endif
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--
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1.7.10.4
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