Including C source in GNAT project for building library

[Simon Wright <simon.j.wright@mac.com>]

This relates to building TASH as a library (static, libtash.a) using
GNAT Project, as in GNAT-GPL-2007.

As well as Ada source, this library needs two C-sourced units to act
as wrappers for macros in the Tcl/Tk header files.

I can do this by hand (obviously only for a static library) by doing
this after gnatmake has done its part:

   gcc -c -g -O2 -I/usr/include tclmacro.c
   gcc -c -g -O2 -I/usr/include tkmacro.c
   ar -r lib/libtash.a tclmacro.o tkmacro.o
   ranlib lib/libtash.a

but can't help feeling there should be a way to tell gnatmake to do
this!

So far I have

with "../tash_options";

project Build_Tash_Library is

  for Library_Name use "tash";
  for Languages use ("Ada","C");
  for Library_Interface use
    (
     "cargv",
     "chelper",
     "tash.arrays",
     "tash.file",
     "tash.file_io",
     "tash.float_arrays",
     "tash.float_lists",
     "tash.floats",
     "tash.integer_arrays",
     "tash.integer_lists",
     "tash.integers",
     "tash.lists",
     "tash.platform",
     "tash.regexp",
     "tash.strings",
     "tash.system",
     "tash",
     "tcl.ada",
     "tcl.tk.ada",
     "tcl.tk",
     "tcl"
     );
  for Source_Files use
    (
     "tclmacro.c",
     "tkmacro.c",
     "cargv.adb",
     "cargv.ads",
     "chelper.adb",
     "chelper.ads",
     "tash-arrays.adb",
     "tash-arrays.ads",
     "tash-file.adb",
     "tash-file.ads",
     "tash-file_io.adb",
     "tash-file_io.ads",
     "tash-float_arrays.ads",
     "tash-float_lists.ads",
     "tash-floats.adb",
     "tash-floats.ads",
     "tash-integer_arrays.ads",
     "tash-integer_lists.ads",
     "tash-integers.adb",
     "tash-integers.ads",
     "tash-lists.adb",
     "tash-lists.ads",
     "tash-platform.adb",
     "tash-platform.ads",
     "tash-regexp.adb",
     "tash-regexp.ads",
     "tash-strings.adb",
     "tash-strings.ads",
     "tash-system.adb",
     "tash-system.ads",
     "tash.adb",
     "tash.ads",
     "tcl-ada.adb",
     "tcl-ada.ads",
     "tcl-tk-ada.adb",
     "tcl-tk-ada.ads",
     "tcl-tk.adb",
     "tcl-tk.ads",
     "tcl.adb",
     "tcl.ads"
    );
  for Object_Dir use ".build_lib";
  for Library_Kind use "static";
  for Library_Src_Dir use "lib";
  for Library_Dir use "lib";

  package IDE is
     for Compiler_Command ("ada") use "gnatmake";
     for Gnatlist use "gnatls";
     for VCS_Kind use "CVS";
  end IDE;

  package Builder is
     for Default_Switches ("ada") use ("-m", "-g");
  end Builder;

  package Compiler is
     for Default_Switches ("ada") use Tash_Options.Compiler_Options;
     for Default_Switches ("C") use ("-c", "-g", "-O2", "-I/usr/include");
  end Compiler;

end Build_Tash_Library;