Re: ANN: Ada 2005 Math Extensions, 20100901 release

[Simon Wright <simon@pushface.org>]

Ada novice <ycalleecharan@gmx.com> writes:

> On Sep 6, 9:49 pm, Simon Wright <si...@pushface.org> wrote:
>
>> In order to use this library within your own code, you need to use a
>> GPR referencing the extensions' GPR, "ada_math_build" [This name is
>> subject to change]. Either
>>
>> * say 'with "ada_math_build";' and include
>>   /where/ever/gnat-math-extn-YYYYMMDD/src in your ADA_PROJECTS_PATH
>>   environment variable; or
>>
>> * say 'with "/where/ever/gnat-math-extn-YYYYMMDD/src/ada_math_build";'
>>   (this path can be relative, if you like)."
>
> I asked about this earlier but didn't get an answer. Hopefully,
> someone will answer now. If I want to use the library with my own
> code, then how do I proceed? I tried the first solution (from above)
> but I don't know how to include /where/ever/gnat-math-extn-YYYYMMDD/
> src in the ADA_PROJECTS_PATH environment variable.

When I wrote "/where/ever/..." I was being guilty of being
Unix-centric. Sorry.

The equivalent on Windows would be "X:\where\ever\...", in other words a
full file path from the top level downwards ('absolute' path).

There's a reasonable-looking tutorial on Windows env vars at
http://www.chem.gla.ac.uk/~louis/software/faq/q1.html (select your
Windows version in the first paragraph).

> As for the second solution, I understand that it can be either a / or
> a \ depending whether it's Windows or Linux. I have Windows and I
> tried /. I can't get this to work. And how do I put an absolute path?
> The GNAT compiler expects an identifier after with and it finds " and
> complains.

As someone else said, GPRs are read by the gnatmake tool, not by the
compiler (I realise this is a hard distinction to make!).

   gnatmake foo.adb    -- compile the Ada source foo.adb
   gnatmake -P foo.gpr -- read & obey the project file foo.gpr

Windows gnatmake is quite happy to read forward-slash or backward-, I'm
not so sure about Unix gnatmake.


You may find it easier to model your GPR on my test_extensions.gpr -
suppose that you've unpacked my package into C:\gnat-math-extn-20100911,
then your GPR would begin

with "C:\gnat-math-extn-20100911\src\ada_math_build";
project YC is
  ...