Re: numerous tests fail in "make check" stage of gdb-8.0.1 on Debian 8.8 powerpc64

[Dennis Clarke <dclarke@blastwave.org>]

On 09/27/2017 05:45 PM, Yao Qi wrote:
> On Wed, Sep 27, 2017 at 2:34 PM, Dennis Clarke <dclarke@blastwave.org> wrote:
>>
>> It is difficult to know if the entire gdb build should be tossed away or is
>> this normal behavior ?
>>
> 
> GDB tests are never FAIL free, so some test fails don't mean GDB is
> completely broken.  However,
> fails in these tests do means something is wrong.
> 

I am not sure what to make of that. It means "something is wrong" and
also "something is always wrong with gdb".

The test results look like so :

                 === gdb Summary ===

# of expected passes            33093
# of unexpected failures        96
# of expected failures          58
# of known failures             65
# of unresolved testcases       3
# of untested testcases         56
# of unsupported tests          206
/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001/gdb/testsuite/../../gdb/gdb 
version  8.0.1 -nw -nx -data-directory 
/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001/gdb/testsuite/../data-directory 


gmake[4]: *** [check-single] Error 1
gmake[4]: Leaving directory 
`/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001/gdb/testsuite'
gmake[3]: *** [check] Error 2
gmake[3]: Leaving directory 
`/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001/gdb/testsuite'
gmake[2]: *** [check] Error 2
gmake[2]: Leaving directory 
`/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001/gdb'
gmake[1]: *** [check-gdb] Error 2
gmake[1]: Leaving directory 
`/usr/local/build/gdb-8.0.1_linux_3.16.0-4-powerpc64.001'
gmake: *** [do-check] Error 2

So there are 96 failures that were not expected. Also, the resultant gdb
binary seems to have found my libiconv and libexpat but not libz :

deb8_ppc64$ ldd ./gdb/gdb
         linux-vdso64.so.1 (0x00003fff7efe0000)
         libdl.so.2 => /lib64/libdl.so.2 (0x00003fff7efb0000)
         libexpat.so.1 => /usr/local/lib/libexpat.so.1 (0x00003fff7ef50000)
         libiconv.so.2 => /usr/local/lib/libiconv.so.2 (0x00003fff7ee30000)
         libm.so.6 => /lib64/libm.so.6 (0x00003fff7ed60000)
         libc.so.6 => /lib64/libc.so.6 (0x00003fff7eb90000)
         /lib64/ld64.so.1 (0x0000000051b20000)


deb8_ppc64$ ls -lo /usr/local/lib/libz*
-rw-r--r-- 1 root 333690 May 27 03:05 /usr/local/lib/libz.a
lrwxrwxrwx 1 root     14 May 27 03:05 /usr/local/lib/libz.so -> 
libz.so.1.2.11
lrwxrwxrwx 1 root     14 May 27 03:05 /usr/local/lib/libz.so.1 -> 
libz.so.1.2.11
-rwxr-xr-x 1 root 236688 May 27 03:05 /usr/local/lib/libz.so.1.2.11
deb8_ppc64$

Not sure if I can install this or not.

My whole reason for this is simply that gdb on the system won't work
with a 64-bit binary and I don't know why :

deb8_ppc64$ cat hello.c

#include <stdio.h>
#include <stdlib.h>
int main( int argc, char *argv[])
{
     fprintf ( stdout, "hello world.\n" );
     return (  EXIT_SUCCESS );
}

Compile it, run it and look at it :

Code:

deb8_ppc64$ gcc -m64 -g -o hello hello.c
deb8_ppc64$ ./hello
hello world.

deb8_ppc64$ file hello
hello: ELF 64-bit MSB executable, 64-bit PowerPC or cisco 7500, version 
1 (SYSV), dynamically linked, interpreter /lib64/ld64.so.1, for 
GNU/Linux 2.6.32, 
BuildID[sha1]=c79bcf90665edeb4b1d9a5972c4f7ddf8ec9877d, not stripped
deb8_ppc64$


deb8_ppc64$ which gdb
/usr/bin/gdb
deb8_ppc64$ ls -lap /usr/bin/gdb
-rwxr-xr-x 1 root root 6301688 Nov  9  2014 /usr/bin/gdb
deb8_ppc64$ /usr/bin/gdb hello
GNU gdb (Debian 7.7.1+dfsg-5) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "powerpc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
"/usr/local/src/test/hello/hello": not in executable format: File format 
not recognized
(gdb) quit
deb8_ppc64$


So I decided to simply get the source and build a new gdb. Which may not
  work very well given the tests above.

Very difficult to tell what to do here.

Dennis