[PATCH v3 1/2] gdb/testsuite: Add libc_has_debug_info require helper

[Bernd Edlinger]

Hello Thiago,

On 4/26/24 05:00, Thiago Jung Bauermann wrote:
> Sorry for the trouble. I should have simulated a situation where GDB
> can't find libc.so in the inferior. I was able to reproduce the error
> above when I did.
> 
> Could you please test the patch that I just sent?
> 

Yeah it works.  Thanks a lot for the quick response.

>> while previously that looked like:
>>
>> gdb compile failed, /home/ed/gnu/riscv64-unknown-elf/lib/gcc/riscv64-unknown-elf/14.0.1/../../../../riscv64-unknown-elf/bin/ld: /tmp/ccjr19GC.o: in function `main':
>> /home/ed/gnu/binutils-build-riscv64/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:30:(.text+0x28): undefined reference to `alarm'
>> /home/ed/gnu/riscv64-unknown-elf/lib/gcc/riscv64-unknown-elf/14.0.1/../../../../riscv64-unknown-elf/bin/ld:
>> /home/ed/gnu/binutils-build-riscv64/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:31:(.text+0x30):
>> undefined reference to `pause'
>> /home/ed/gnu/riscv64-unknown-elf/lib/gcc/riscv64-unknown-elf/14.0.1/../../../../riscv64-unknown-elf/bin/ld:
>> /home/ed/gnu/binutils-build-riscv64/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.base/relativedebug.c:31:(.text+0x38):
>> undefined reference to `pause'
>> collect2: error: ld returned 1 exit status
>> UNTESTED: gdb.base/relativedebug.exp: failed to compile
>>
>> so not very noisy, newlib does apparently not have alarm, pause, sleep, and similar,
>> but much easier to understand the output...
> 
> On the plus side, with this problem fixed gdb.base/relativedebug.exp
> should exit early with:
> 
> (gdb) info sharedlibrary libc.so
> No shared libraries matched.
> (gdb) UNSUPPORTED: gdb.base/relativedebug.exp: require failed: libc_has_debug_info (libc not found in the inferior)
> 
> Which will be even easier to understand the output. :-)
> 

Yes, indeed.

If I had one wish free, I would like to have
these lines not mention the random /tmp/*.o file name:

gdb compile failed, /home/ed/gnu/riscv64-unknown-elf/lib/gcc/riscv64-unknown-elf/14.0.1/../../../../riscv64-unknown-elf/bin/ld: /tmp/ccjr19GC.o: in function `main':

... at least in the gdb.sum file.

Thanks
Bernd.