Re: error when running "make bench"

[paul zimmermann <Paul dot Zimmermann at inria dot fr>]

thank you Szabolcs, this solved the problem.

However, I believe the issue is on the glibc side. Indeed, the
bench-timing-type is linked with /tmp/lib/ld-linux-x86-64.so.2
by the glibc Makefile, and that file doesn't exist if "make install"
was not done (I configured with ./configure --prefix=/tmp).

Thus either benchtests/README should indicate that "make install" should
be done, or the compile line for bench-timing-type should not link with
files in $PREFIX.

To reproduce:

$ git clone git://sourceware.org/git/glibc.git
$ cd glibc
$ mkdir build
$ cd build
$ ../configure --prefix=/tmp
$ make -j4
$ make bench

Best regards,
Paul

> From: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
> CC: nd <nd@arm.com>, "libc-alpha@sourceware.org" <libc-alpha@sourceware.org>
> Thread-Topic: error when running "make bench"
> Thread-Index: AQHVy8STAjP+xHdPFUeTg1WXkdE96Kfr/CKAgADg6e+AACnCAA==
> Date: Thu, 16 Jan 2020 09:27:36 +0000
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> 
> On 16/01/2020 06:57, paul zimmermann wrote:
> > what is strange is that the file exists:
> > 
> > $ ls -l /tmp/glibc/build/benchtests/bench-timing-type
> > -rwxr-xr-x 1 zimmerma caramba 35760 Jan 16 07:48 /tmp/glibc/build/benchtests/bench-timing-type
> > 
> > $ file /tmp/glibc/build/benchtests/bench-timing-type
> > /tmp/glibc/build/benchtests/bench-timing-type: ELF 64-bit LSB shared object,
> > x86-64, version 1 (SYSV), dynamically linked, interpreter /tmp/lib/ld-linux-x86-64.so.2,
>                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > BuildID[sha1]=6eaee68beda7ba9d3a4e7c329d427b5c0676483d, for GNU/Linux 3.2.0, with debug_info, not stripped
> > 
> > however it does not want to run:
> > 
> > $ /tmp/glibc/build/benchtests/bench-timing-type
> > -bash: /tmp/glibc/build/benchtests/bench-timing-type: No such file or directory
> 
> that executable seems to be built with
> 
>  -Wl,-dynamic-linker=/tmp/lib/ld-linux-x86-64.so.2
> 
> which does not exist, you can quickly fix it now
> by making that a symlink to wherever the dynamic
> linker is (and set up runtime library paths where
> libc.so.6 etc is)
> 
> but i think ideally your host toolchain should
> not produce executables that cannot run.