Bug#851253: bootstrap build failure: install: cannot stat 'build-deb/.libs/test-udev': No such file or directory

[Helmut Grohne]

Control: reassign libtool
Control: retitle -1 libtool misdetects nios2 as os2
Control: tags -1 =
Control: affects -1 + src:systemd

On Fri, Jan 13, 2017 at 07:28:30PM +0100, Helmut Grohne wrote:
> Still I am very much interested in finding the real cause. Given that
> you suspect libtool, I went ahead and looked at the linker invocation of
> test-udev for all architectures (in bootstrap builds). With two
> exceptions, all of them were storing the executable at .libs/test-udev.
> The two exceptions are nios2 and sparc. (I may have missed some
> architectures due to temporary failures.) Does this ring any bells?

Identifying sparc here was just wrong. I looked through the logs and
caught it wrongly. It really is just nios2.

Looking closer at the log, it turns out that libtool is adding a
-Wl,-rpath -Wl,$buildpath for nios2 and it shouldn't be doing that.

While the reasons are not entirely clear, the cause was correctly
guessed by Marek Vasut: Confusion with os2.

The following patch made the problem go away:

sed -i -e 's/\*os2\*/*-os2*/' /usr/share/libtool/build-aux/ltmain.sh

All of the lines matched are case expressions and the change causes them
to no longer match nios2.

I'm not proposing it as is for inclusion into libtool, but merely
showing it to demonstrate the cause and leave it up to Marek to produce
a mergeable version.

Helmut