Rework libghdl build/install procedure (#840)

* feat(libghdl): add libghdl_pkg.py, add option to generate libghdl-py.tgz with dist/travis/build.sh

* libghdl*.so is now part of GHDL

* move python sources to python/libghdl and python/pnodes
* rename src/vhdl/python to src/vhdl/libghdl
* add generation of tarball for libghdl-py to the makefile
* deprecate --enable-python and --disable-python
* add configuration option --disable-libghdl

* feat(python/libghdl): add support for LIBGHDL_PREFIX (#844)

* fix(travis): disable libghdl on mac

* feat(python/libghdl): add support for GHDL_BIN_PATH and VUNIT_GHDL_PATH

1 files changed, 33 insertions, 0 deletions

diff --git a/src/vhdl/libghdl/libghdl.ads b/src/vhdl/libghdl/libghdl.ads
new file mode 100644
index 000000000..dbc6b260e
--- /dev/null
+++ b/src/vhdl/libghdl/libghdl.ads
@@ -0,0 +1,33 @@
+--  Library interface for the analyzer.
+--  Copyright (C) 2017 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
+--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+--  for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with GHDL; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+
+with Types; use Types;
+with Vhdl.Nodes; use Vhdl.Nodes;
+
+package Libghdl is
+   --  To be called before Analyze_Init to set command line options.
+   --  This decodes a driver option (so handle all analyzer options, and
+   --  --ieee). Return 0 for success.
+   function Set_Option (Opt : Thin_String_Ptr; Len : Natural) return Integer;
+
+   --  To be called before Analyze_File to initialize analysis.
+   procedure Analyze_Init;
+
+   --  Analyze one file.
+   function Analyze_File (File : Thin_String_Ptr; Len : Natural) return Iir;
+end Libghdl;