On Thu, Nov 6, 2014 at 2:09 PM, John Paul Adrian Glaubitz
<glaub...@physik.fu-berlin.de> wrote:
> Hi Daniel!
>
> What architecture are you trying to build gdb on and what build
> environment are you using? I think you owe it to the maintainer to
> provide a little more detailed information when you file a bug report
> tagged as "grave".
>
> In fact, gdb currently fails to build from source on the Debian
> architectures "powerpcspe" and "sh4" only and I just stumbled over
> your bug as I am one of the active sh4 porters.
>
> I would rather tend to downgrade this bug to severity "important"
> unless you can show that the problem affects any of our release
> architectures. Both "powerpcspe" and "sh4" are not release
> architectures and any bugs regarding these architectures can therefore
> not be regarded as release-critical.
I was building on amd64 using pbuilder. As far as I can tell, the
culprit is this in debian/rules:
# Cross configuration support. Check for an environment variable
# $GDB_TARGET, or a file debian/target.
ifndef GDB_TARGET
DEBIAN_TARGET_FILE := $(strip $(shell cat debian/target 2>/dev/null))
ifneq ($(DEBIAN_TARGET_FILE),)
GDB_TARGET := $(DEBIAN_TARGET_FILE)
endif
endif
DEB_TARGET_ARCH := $(shell dpkg-architecture -f \
-a$(GDB_TARGET) -qDEB_HOST_ARCH 2>/dev/null)
...
ifeq ($(DEB_TARGET_ARCH),)
$(error GDB_TARGET value "$(GDB_TARGET)" is not a valid Debian architecture)
endif
So because debian/target doesn't exist in a straight build, GDB_TARGET
is empty. And "dpkg-architecture -f -a -qDEB_HOST_ARCH" prints this
to stderr and nothing to stdout:
dpkg-architecture: unknown option `DEB_HOST_ARCH'
Use --help for program usage information.
Therefore, DEB_TARGET_ARCH is empty and the error gets triggered.
I suspect this might be new behavior in recent updates of dpkg; but if
it worked before with nothing provided to -a, that would be a pure
accident. Could you make sure that your build environment is up to
date with sid and has dpkg 1.17.21?
--
Daniel Schepler
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