RFR: 7903755: multi header support and special syntax for header file [v4]

[Nir Lisker]

On Wed, 19 Jun 2024 16:58:39 GMT, Athijegannathan Sundararajan <sundar at openjdk.org> wrote:

>> jextract currently supports only one header file. If the user wants to extract more than one header file, s/he has to create a containing header that includes multiple headers and jextract the containing header.
>> 
>> With the current change, jextract supports more than one header file in the command line.
>> When multiple headers are specified in command line, --header-class-name option is mandatory and it is enforced.
>> 
>> In addition to normal file names for header file names, a special syntax such as "<stdio.h>" is also supported. With this, user does not have to write long file name including directories such as /usr/include/stdio.h.
>> 
>> jextract generates multiple headers by generating a temporary header file. If the command line argument is of the form "<stdio.h>" then jextract generates "#include <stdio.h>" in the auto-generated containing header. If the header specified in of the normal/existing form (say foo.h), then containing header will have #include "foo.h" line.
>
> Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   updated section on basic jextract usage for multiple header files and special header syntax
>   with a link to command line option reference based on review comment.

Maybe the command line options table entry for `--header-class-name <name>` should be updated regarding the mandatory use of it. Currently it says "If this option is not specified", but this is not always valid anymore.

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PR Comment: https://git.openjdk.org/jextract/pull/249#issuecomment-2179161760