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
 
-- 
2.21.3

Err extra 'and' in patch subject, should be:
"rules.mak: Add strequal() and startwith() rules"

I can respin the whole if it is easier for the maintainer.

On 6/5/20 9:39 AM, Philippe Mathieu-Daudé wrote:
> 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
>  
> 

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?

On 6/5/20 2:48 PM, Markus Armbruster wrote:
> 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?

Indeed... Does that mean I can respin with your R-b here and in the next
patch? :P