Re: GNAT Project Files?

[Stephen Leake <stephen_leake@acm.org>]

Jacob Sparre Andersen <sparre@nbi.dk> writes:

> I have some difficulties with understanding GNAT project files.  And
> since most of tha Ada libraries on Debian seem to use them, it looks
> like I have to as well.

You need to read both the GNAT user's guide, and the GNAT reference
manual, to get all the relevant information on project files.

> My second solution was to try to put one together myself:
> -----
> with "/usr/share/ada/adainclude/aws";
> with "/usr/share/ada/adainclude/charles";
> with "/home/sparre/Ada/Pakker/Strenge/string_arrays";
> with "/home/sparre/Ada/Programmer/CGI/Ordlisten/get_random_words";

It's better to specify the search path in the ADA_PROJECT_PATH
environment variable, so you can move things around.

> project Test_Word_Buffer is
>    for Object_Dir use ".";
>    for Exec_Dir use ".";
>    for Main use ("test_word_buffer");
> end Test_Word_Buffer;
> -----
> At least GNAT doesn't complain about syntax errors in this file, but
> once it comes to the linking stage I get a whole bunch of errors
> looking like these:
> -----
> b~test_word_buffer.o(.text+0xa32): In function `adainit':
> : undefined reference to `aws__os_lib_E'
> b~test_word_buffer.o(.text+0xa48): In function `adainit':
> : undefined reference to `aws__os_lib___elabs'
> b~test_word_buffer.o(.text+0xa4e): In function `adainit':
> : undefined reference to `aws__os_lib_E'
> -----
> What is wrong/missing in the GNAT project file?

There is apparently a non-Ada library that you need to link with. use:

  package Linker is
     for Switches ("bus_master.adb") use ("-lgds_1553_c");
  end Linker;

-- 
-- Stephe