[Pkg-vala-maintainers] Bug#564088: Name of lua.vapi does not match pkg-config name

[Enrico Zini]

Package: valac
Version: 0.7.8-2
Severity: normal

Hello, and thank you for maintaning Vala.

Given this test.vala:

   static int main (string[] args) {
       Lua.LuaVM lua = new Lua.LuaVM();
       return 0;
   }

It cannot be linked because "pkg-config --cflags lua" does not work:

   $ valac --pkg lua test.vala 
   test.vala:2.15-2.35: warning: local variable `lua' declared but never used
       Lua.LuaVM lua = new Lua.LuaVM();
                 ^^^^^^^^^^^^^^^^^^^^^
   /tmp/test.vala.c:7:17: error: lua.h: No such file or directory
   /tmp/test.vala.c: In function ‘_main’:
   /tmp/test.vala.c:21: error: ‘lua_State’ undeclared (first use in this function)
   /tmp/test.vala.c:21: error: (Each undeclared identifier is reported only once
   /tmp/test.vala.c:21: error: for each function it appears in.)
   /tmp/test.vala.c:21: error: ‘lua’ undeclared (first use in this function)
   /tmp/test.vala.c:22: error: expected expression before ‘)’ token
   error: cc exited with status 256
   Compilation failed: 1 error(s), 1 warning(s)
   
   $ pkg-config --cflags lua
   Package lua was not found in the pkg-config search path.
   Perhaps you should add the directory containing `lua.pc'
   to the PKG_CONFIG_PATH environment variable
   No package 'lua' found

However, this can be worked around by giving the .vapi file a name that
matches pkg-config:

   $ pkg-config --cflags lua5.1
   -I/usr/include/lua5.1  
   $ ln -s /usr/share/vala/vapi/lua.vapi lua5.1.vapi
   $ valac --vapidir . --pkg lua5.1 test.vala 
   test.vala:2.15-2.35: warning: local variable `lua' declared but never used
       Lua.LuaVM lua = new Lua.LuaVM();
                 ^^^^^^^^^^^^^^^^^^^^^
   /tmp/test.vala.c: In function ‘_main’:
   /tmp/test.vala.c:22: warning: cast to pointer from integer of different size
   Compilation succeeded - 1 warning(s)

Ideally, different Lua API versions should have different .vapis
matching their differences, if any. But if there are not may
differences, maybe just shipping the symlinks to the various
api-specific pkg-config names will do.


Cheers,

Enrico

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.30-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages valac depends on:
ii  libc6                         2.10.2-2   GNU C Library: Shared libraries
ii  libglib2.0-0                  2.22.3-1   The GLib library of C routines
ii  libglib2.0-dev                2.22.3-1   Development files for the GLib lib
ii  libvala0                      0.7.8-2    C# like language for the GObject s

valac recommends no packages.

valac suggests no packages.

-- no debconf information