[build] Generate pkg-config metadata to link to DXVK libraries

This allows dependent projects to query the version and location of DXVK
via the pkg-config interface.

The include directories aren't yet set, because the headers aren't
installed; that will follow in a subsequent commit.

The naming of these pkg-config files is based on proposed Fedora packages
for DXVK 2.0, and is not compatible with older Fedora packages for DXVK
1.x (which used the naming convention dxvk-native-d3d9 and so on).
Packagers can create symlinks such as dxvk-native-d3d9.pc -> dxvk-d3d9.pc
if they want to retain compatibility with older names.

Signed-off-by: Simon McVittie <smcv@collabora.com>

meson.build

@@ -1,5 +1,6 @@
 project('dxvk', ['c', 'cpp'], version : 'v2.3.1', meson_version : '>= 0.58', default_options : [ 'cpp_std=c++17', 'warning_level=2' ])
 
+pkg = import('pkgconfig')
 cpu_family = target_machine.cpu_family()
 platform   = target_machine.system()
 fs = import('fs')
@@ -146,6 +147,7 @@ else
   endif
   
   dxvk_name_prefix = 'dxvk_'
+  dxvk_pkg_prefix = 'dxvk-'
 
   link_args += [
     '-static-libgcc',

src/d3d10/meson.build

@@ -28,3 +28,10 @@ d3d10_core_dll = shared_library(dxvk_name_prefix+'d3d10core', d3d10_core_src, d3
 d3d10_core_dep = declare_dependency(
   link_with           : [ d3d10_core_dll ],
 )
+
+if platform != 'windows'
+  pkg.generate(d3d10_core_dll,
+    filebase: dxvk_pkg_prefix + 'd3d10core',
+    subdirs:  'dxvk',
+  )
+endif

src/d3d11/meson.build

@@ -92,3 +92,10 @@ d3d11_dep = declare_dependency(
   link_with           : [ d3d11_dll ],
   include_directories : [ dxvk_include_path ],
 )
+
+if platform != 'windows'
+  pkg.generate(d3d11_dll,
+    filebase: dxvk_pkg_prefix + 'd3d11',
+    subdirs:  'dxvk',
+  )
+endif

src/d3d9/meson.build

@@ -71,3 +71,10 @@ d3d9_dep = declare_dependency(
   link_with           : [ d3d9_dll ],
   include_directories : [ dxvk_include_path ],
 )
+
+if platform != 'windows'
+  pkg.generate(d3d9_dll,
+    filebase: dxvk_pkg_prefix + 'd3d9',
+    subdirs:  'dxvk',
+  )
+endif

src/dxgi/meson.build

@@ -35,3 +35,10 @@ dxgi_dep = declare_dependency(
   link_with           : [ dxgi_dll ],
   include_directories : [ dxvk_include_path ],
 )
+
+if platform != 'windows'
+  pkg.generate(dxgi_dll,
+    filebase: dxvk_pkg_prefix + 'dxgi',
+    subdirs:  'dxvk',
+  )
+endif