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gdb: arc: remove C++ dependency and disable build with C++

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gdb arc-2016.09-rc1 is based on upstream 7.12 gdb version where we can
still disable C++ build. For more information take a look at:
https://sourceware.org/gdb/wiki/cxx-conversion

We wanted to build gdb with C++ as it is used as default in 7.12
and is even a mandatory requirement since 2016/09.

But unfortunately we missed one runtime failure that C++ build causes
and so now we have to disable C++ build.

When gdb arc-2016.09-rc1 is built as a C++ application it segfaults at
runtime for ARC.

We are going to fix the issue in 2017.03 ARC toolchain release.  and
before this we remove C++ dependency are adding temporary workaround
to prevent runtime segfaults.

The workaround is to disable building gdb as C++ application via
passing --disable-build-with-cxx config option when building gdb for
ARC.

Signed-off-by: Vlad Zakharov <vzakhar@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Zakharov Vlad 2016-11-15 18:21:31 +03:00 committed by Thomas Petazzoni
parent aae80e71b6
commit ca99d0ea92
2 changed files with 7 additions and 6 deletions
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6
package/gdb/Config.in
View File

@ -2,10 +2,6 @@ comment "gdb/gdbserver needs a toolchain w/ threads, threads debug"
depends on !BR2_nios2 && !BR2_bfin
depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_TOOLCHAIN_HAS_THREADS_DEBUG
comment "gdb/gdbserver needs a toolchain w/ C++"
depends on BR2_arc
depends on !BR2_INSTALL_LIBSTDCPP
config BR2_PACKAGE_GDB
bool "gdb"
# When the external toolchain gdbserver is copied to the
@ -15,8 +11,6 @@ config BR2_PACKAGE_GDB
(!BR2_PACKAGE_GDB_DEBUGGER && !BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY)
depends on BR2_TOOLCHAIN_HAS_THREADS && BR2_TOOLCHAIN_HAS_THREADS_DEBUG
depends on !BR2_nios2 && !BR2_bfin
# Since ARC gdb moved to 7.12 toolchain requires C++ support to build gdb.
depends on !BR2_arc || BR2_INSTALL_LIBSTDCPP
help
GDB, the GNU Project debugger, allows you to see what is
going on `inside' another program while it executes -- or

7
package/gdb/gdb.mk
View File

@ -100,6 +100,13 @@ GDB_CONF_OPTS = \
--disable-werror \
--enable-static
# When gdb is built as C++ application for ARC it segfaults at runtime
# So we pass --disable-build-with-cxx config option to force gdb not to
# be built as C++ app.
ifeq ($(BR2_arc),y)
GDB_CONF_OPTS += --disable-build-with-cxx
endif
ifeq ($(BR2_PACKAGE_GDB_TUI),y)
GDB_CONF_OPTS += --enable-tui
else