Re: [PATCH v5 04/11] rules.mak: Add strequal() and startwith() and rules

[Markus Armbruster]

Philippe Mathieu-Daudé <philmd@redhat.com> writes:

> Add a rule to test if two strings are equal,
> and another to test if a string starts with a substring,
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> ---
>  rules.mak | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/rules.mak b/rules.mak
> index 694865b63e..ccc1c49604 100644
> --- a/rules.mak
> +++ b/rules.mak
> @@ -191,6 +191,20 @@ ne = $(if $(subst $2,,$1)$(subst $1,,$2),y,n)
>  isempty = $(if $1,n,y)
>  notempty = $(if $1,y,n)
>  
> +# strequal
> +# Usage: $(call strequal, str1, str2)
> +#
> +# This macro returns a string (TRUE) when @str1 and @str2
> +# are equal, else returns the empty string (FALSE)
> +strequal = $(if $(subst $2,,$1)$(subst $1,,$2),,$1)
> +
> +# startwith
> +# Usage: $(call startwith, startstr, fullstr)
> +#
> +# This macro returns a string (TRUE) when @fullstr starts with
> +# @startstr, else returns the empty string (FALSE)
> +startwith = $(findstring :$1,:$2)
> +
>  # Generate files with tracetool
>  TRACETOOL=$(PYTHON) $(SRC_PATH)/scripts/tracetool.py

Should this be spelled startswith?