[Info-vax] MariaDB/MySQL on x86

[Craig A. Berry]

On 4/25/23 12:04 PM, Arne Vajhøj wrote:
> On 4/25/2023 11:33 AM, Mark Berryman wrote:

>> The field test is still limited in some functionality.  For example, 
>> there are some pragmas that are not yet supported or not yet fully 
>> supported.  The include_directory pragma does not yet appear to work 
>> and my build procedure depends heavily on this.
> 
> Is that VMS C++ specific pragma or standard?

Pages 24-25 here:

https://docs.vmssoftware.com/test-docs/vsi-cxx-user-s-guide-for-openvms-systems.pdf

say:

"This pragma is intended to ease DCL command-line length limitations
when porting applications from POSIX-like environments built with
makefiles containing long lists of -I options that specify directories
to search for headers. Just as long lists of macro definitions specified
by the /DEFINE qualifier can be converted to #define directives in a
source file, long lists of places to search specified by the
/INCLUDE_DIRECTORY qualifier can be converted to #pragma
include_directory directives in a source file."

> If VMS C++ specific then maybe it will not be added as I believe John R
> want to keep the C++ compiler as close to clang elsewhere as possible.

A worthy goal, but if there are workarounds in the compiler for
limitations in the VMS build environment, they may very well still be
needed.  Unless alternate solutions are found.  In this case, it *might*
be possible, depending on current command line length limitations and
where and how the MariaDB build exceeds them, to use clang++ rather than
CXX from the command line.  That based on the fact that -Ifoo takes up
less space than /INCLUDE=[foo].  But even if that works, it's just one
reason it might be a new port as Mark suggested might be necessary
rather than just carrying forward the existing port.