[PATCH][gdb/testsuite] Compile index-cache.c with -Wl,--build-id

[Pedro Alves]

On 6/21/19 4:27 PM, Tom de Vries wrote:
> Hi,
> 
> When building gdb using a combined gcc/binutils-gdb build and running
> gdb.base/index-cache.exp we get:
> ...
> FAIL: gdb.base/index-cache.exp: test_cache_enabled_miss: at least one file was created
> FAIL: gdb.base/index-cache.exp: test_cache_enabled_miss: couldn't get executable build id
> FAIL: gdb.base/index-cache.exp: test_cache_enabled_hit: check index-cache stats
> ...
> 
> With "set debug index-cache on" we get:
> ...
> (gdb) file index-cache
> Reading symbols from index-cache...
> index cache: objfile index-cache has no build id
> ...
> 
> The problem is that the vanilla toolchain does not add a build-id, which is
> required for the index-cache functionality.

What is "vanilla" here?  A non-combined gcc/build-gdb build?
Or is "combined gcc/build-gdb build" irrelevant here, and
"vanilla" means "no-distro-patches build"?  Was the testcase
written on a system with a compiler that defaults to --build-id ?

Thanks,
Pedro Alves