Hi Bruno,

On 1/13/20 12:01 PM, Bruno Haible wrote:
> Hi Tim,
>> you could look at libidn2 as an example how to use system libunistring
>> if there (or if new enough) and fallback to gnulib unistring.
>> (BTW, libunistring is made of the gnulib unistring modules)
>> It creates a separate dir / library for gnulib unistring functions,
>> *BUT* only uses it when a system libunistring can't be found.
>> bootstrap.conf: Call gnulib-tool in bootstrap_post_import_hook() only
>> for the needed unistring modules.
>> configure.ac: Check for system libunistring (set a conditional
>> Makefile.am: if !HAVE_LIBUNISTRING -> add unistring/ to SUBDIR
>> */Makefile.am: if !HAVE_LIBUNISTRING -> add unistring/ to includes in
> A simpler way to achieve the same thing is to include the gnulib module
> 'libunistring-optional'. It will use the system libunistring if it
> exists and is new enough, and otherwise compile the respective modules
> from source.

Ah, I didn't know that, thanks.

Don't that pull in all the unistring modules (and code) ? At least for
building the project.

In libidn2 we just use a small subset of the vast functionality of
gnulib unistring. In order to keep build overhead small, isn't that the
way to go ? I only know that building libunistring takes a while...

Regards, Tim

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