Info Catalog ada-mode: Use GNAT project file ada-mode: Compiling Examples

ada-mode: Use multiple GNAT project files

 
 6.5 Use multiple GNAT project files
 ===================================
 
 In this example, we show how to use multiple GNAT project files,
 specifying the GNAT project search path in an Ada mode project file.
 
    Create the directory ‘Example_4’ as specified in Use GNAT
 project file.
 
    Create the directory ‘Example_5’, containing:
 
    ‘hello_5.adb’:
 
      with Hello_Pkg;
      with Ada.Text_IO; use Ada.Text_IO;
      procedure Hello_5
      is begin
         Hello_Pkg.Say_Hello;
         Put_Line ("From hello_5");
      end Hello_5;
 
    There are no errors in this file.
 
    ‘hello_5.adp’:
 
      ada_project_path=../Example_4/Gnat_Project
      gpr_file=hello_5.gpr
 
    ‘hello_5.gpr’:
 
      with "hello_4";
      Project Hello_5 is
         for Source_Dirs use (".");
         package Compiler is
            for Default_Switches ("Ada") use ("-g", "-gnatyt");
         end Compiler;
      end Hello_5;
 
    In buffer ‘hello_5.adb’, invoke ‘Ada | Project | Load...’, and select
 ‘Example_5/hello_5.adp’.
 
    Then, again in ‘hello_5.adb’, invoke ‘Ada | Set main and Build’.  You
 should get a ‘*compilation*’ buffer containing something like (the
 directory paths will be different):
 
      cd c:/Examples/Example_5/
      gnatmake -o hello_5 hello_5 -Phello_5.gpr -g -cargs -gnatq -gnatQ -bargs  -largs
      gcc -c -g -gnatyt -g -gnatq -gnatQ -I- -gnatA c:\Examples\Example_5\hello_5.adb
      gcc -c -g -gnatyt -g -gnatq -gnatQ -I- -gnatA c:\Examples\Example_4\hello_pkg.adb
      hello_pkg.adb:2:08: keyword "body" expected here [see file name]
      gnatmake: "c:\examples\example_4\hello_pkg.adb" compilation error
 
    Now type ‘C-x `’.  ‘Example_4/hello_pkg.adb’ is shown, demonstrating
 that ‘hello_5.gpr’ and ‘hello_4.gpr’ are being used to set the
 compilation search path.
 

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