Re: [Qemu-devel] [PATCH for-4.0 v3 2/2] roms: Allow passing configure options to the EDK2 build tools

[Igor Mammedov <imammedo@redhat.com>]

On Tue,  9 Apr 2019 15:45:36 +0200
Philippe Mathieu-Daudé <philmd@redhat.com> wrote:

> Since commit f590a812c210 we build the EDK2 EfiRom utility
> unconditionally.
> 
> Some distributions require to use extra compiler/linker flags,
> i.e. SUSE which enforces the PIE protection (see [*]).
> 
> EDK2 build tools already provide a set of variables for that,
> use them to allow the caller to easily inject compiler/linker
> options..
> 
> Now build scripts can pass extra options, example:
> 
>   $ make -C roms \
>       EDK2_BASETOOLS_OPTFLAGS='-fPIE' \
>       efirom
> 
> [*] https://lists.opensuse.org/opensuse-factory/2017-06/msg00403.html
> 
> Reported-by: Olaf Hering <olaf@aepfle.de>
> Suggested-by: Laszlo Ersek <lersek@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> ---
>  roms/Makefile | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/roms/Makefile b/roms/Makefile
> index d28252dafdf..1ff78b63bb3 100644
> --- a/roms/Makefile
> +++ b/roms/Makefile
> @@ -120,8 +120,21 @@ build-efi-roms: build-pxe-roms
>  		$(patsubst %,bin-i386-efi/%.efidrv,$(pxerom_targets)) \
>  		$(patsubst %,bin-x86_64-efi/%.efidrv,$(pxerom_targets))
>  
> +# Build scripts can pass compiler/linker flags to the EDK2 build tools
> +# via the EDK2_BASETOOLS_OPTFLAGS (CPPFLAGS and CFLAGS) and
> +# EDK2_BASETOOLS_LDFLAGS (LDFLAGS) environment variables.
> +#
> +# Example:
> +#
> +#  make -C roms \
> +#    EDK2_BASETOOLS_OPTFLAGS='...' \
> +#    EDK2_BASETOOLS_LDFLAGS='...' \
> +#    efirom
> +#
>  $(EDK2_EFIROM):
> -	$(MAKE) -C edk2/BaseTools
> +	$(MAKE) -C edk2/BaseTools \
> +		EXTRA_OPTFLAGS='$(EDK2_BASETOOLS_OPTFLAGS)' \
> +		EXTRA_LDFLAGS='$(EDK2_BASETOOLS_LDFLAGS)'
>  
>  slof:
>  	$(MAKE) -C SLOF CROSS=$(powerpc64_cross_prefix) qemu