Re: [Qemu-devel] [PATCH] roms/edk2-build.sh: Allow to run edk2-build.sh from command line

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Cc'ing Eric :)

On 6/13/19 7:54 PM, Philippe Mathieu-Daudé wrote:
> The edk2-build.sh script set the 'nounset' option:
> 
>   BASH(1)
> 
>   set [arg ...]
> 
>       -u   Treat unset variables and parameters other than the
>            special parameters "@" and "*" as an error when
>            performing parameter expansion.  If expansion is
>            attempted on an unset variable or parameter, the shell
>            prints an error message, and, if not interactive,
>            exits with a non-zero status.
> 
> When running this script out of 'make', we get:
> 
>   $ cd roms
>   $ ./edk2-build.sh aarch64 --arch=AARCH64 --platform=ArmVirtPkg/ArmVirtQemu.dsc > /dev/null
>   ./edk2-build.sh: line 46: MAKEFLAGS: unbound variable
> 
> Fix this by checking the variable is defined before using it,
> else use a default value.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  roms/edk2-build.sh | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/roms/edk2-build.sh b/roms/edk2-build.sh
> index 4f46f8a6a2..5390228b4e 100755
> --- a/roms/edk2-build.sh
> +++ b/roms/edk2-build.sh
> @@ -43,7 +43,13 @@ fi
>  # any), for the edk2 "build" utility.
>  source ../edk2-funcs.sh
>  edk2_toolchain=$(qemu_edk2_get_toolchain "$emulation_target")
> -edk2_thread_count=$(qemu_edk2_get_thread_count "$MAKEFLAGS")
> +if [ -v MAKEFLAGS ]; then
> +  edk2_thread_count=$(qemu_edk2_get_thread_count "$MAKEFLAGS")
> +else
> +  # We are not running within 'make', let the edk2 "build" utility to fetch
> +  # the logical CPU count with Python's multiprocessing.cpu_count() method.
> +  edk2_thread_count=0
> +fi
>  qemu_edk2_set_cross_env "$emulation_target"
>  
>  # Build the platform firmware.
>