[DTrace-devel] [PATCH 2/2] drti: do not compile with LTO

[Kris Van Hees]

On Thu, Jan 16, 2025 at 09:54:18PM +0000, Nick Alcock wrote:
> drti.o is shipped as object code and can be reused by many compiler
> versions: we must not put LTO IR into it.
> 
> Signed-off-by: Nick Alcock <nick.alcock at oracle.com>

Reviewed-by: Kris Van Hees <kris.van.hees at oracle.com>

> ---
>  libdtrace/Build | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/libdtrace/Build b/libdtrace/Build
> index 722351591aaea..307d7e8bf6434 100644
> --- a/libdtrace/Build
> +++ b/libdtrace/Build
> @@ -122,6 +122,10 @@ dt_prov_uprobe.c_CFLAGS := -Wno-pedantic
>  dt_debug.c_CFLAGS := -Wno-prio-ctor-dtor
>  drti.c_CFLAGS := -Wno-prio-ctor-dtor
>  
> +# drti is shipped as an object file, so do not ever generate
> +# LTO for it, since that is compiler-version-specific.
> +drti.c_CFLAGS += -fno-lto
> +
>  SHORTKERNELS := $(foreach kernel,$(KERNELS),$(shell printf %s $(kernel) | sed -e 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*$$/\1.\2.\3/'))
>  
>  -include libdtrace/$(ARCHINC)/Build
> -- 
> 2.47.1.279.g84c5f4e78e
>