[gtk+/wip/meson] meson: check for xinerama



commit 89d30d88a88fef3026d3366f6cd6f76997eaeccb
Author: Tim-Philipp Müller <tim centricular com>
Date:   Fri Mar 24 11:34:49 2017 +0000

    meson: check for xinerama

 gdk/x11/meson.build |    1 +
 meson.build         |   20 ++++++++++++++++----
 meson_options.txt   |    2 ++
 3 files changed, 19 insertions(+), 4 deletions(-)
---
diff --git a/gdk/x11/meson.build b/gdk/x11/meson.build
index 26b35d5..467e002 100644
--- a/gdk/x11/meson.build
+++ b/gdk/x11/meson.build
@@ -66,6 +66,7 @@ gdk_x11_deps = [
   xfixes_dep,
   xcomposite_dep,
   xrandr_dep,
+  xinerama_dep,
 ]
 
 libgdk_x11 = static_library('libgdk-x11',
diff --git a/meson.build b/meson.build
index 96d1fdf..5158c8b 100644
--- a/meson.build
+++ b/meson.build
@@ -122,8 +122,6 @@ endforeach
 # Maths functions might be implemented in libm
 libm = cc.find_library('m', required : false)
 
-# FIXME: HAVE_XFREE_XINERAMA
-
 check_functions = [
   'dcgettext',
   'getpagesize',
@@ -231,8 +229,6 @@ if x11_enabled
   fontconfig_dep = dependency('fontconfig')
   atkbridge_dep  = dependency('atk-bridge-2.0', version: atk_req)
 
-  # FIXME: check for xinerama + add to x11_pkgs
-
   x11_pkgs = ['fontconfig', 'x11', 'xext', 'xi', 'xrandr']
 
   if xcursor_dep.found()
@@ -281,6 +277,20 @@ if x11_enabled
     endif
   endif
 
+  enable_xinerama = get_option('enable-xinerama')
+  if enable_xinerama != 'no'
+    want_xinerama = enable_xinerama == 'yes'
+    xinerama_dep = dependency('xinerama', required : want_xinerama)
+    if xinerama_dep.found() and cc.has_header_symbol('X11/extensions/Xinerama.h', 'XineramaQueryExtension', 
dependencies : xinerama_dep)
+      cdata.set('HAVE_XFREE_XINERAMA', 1)
+      x11_pkgs += ['xinerama']
+    elif want_xinerama
+      error('No function XineramaQueryExtension in xinerama dependency which was explicitly requested.')
+    endif
+  else
+    xinerama_dep = []
+  endif
+
   cdata.set('HAVE_RANDR', xrandr_dep.found())
   cdata.set('HAVE_RANDR15', xrandr15_dep.found())
 endif
@@ -329,6 +339,8 @@ if enable_vulkan != 'no'
   if vulkan_lib.found() and cc.has_function('vkCreateInstance', dependencies : vulkan_lib) and 
cc.has_header('vulkan/vulkan.h')
     have_vulkan = true
     pc_gdk_extra_libs += ['-lvulkan']
+  elif enable_vulkan == 'yes'
+    error('Vulkan support not found, but was explicitly requested.')
   endif
 else
   message('Vulkan support explicitly disabled')
diff --git a/meson_options.txt b/meson_options.txt
index 7ccabfd..bf80420 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -18,3 +18,5 @@ option('enable-papi-print-backend', type: 'combo', choices : ['yes', 'no', 'auto
   description : 'Enable the papi print backend')
 option('enable-cloudprint-print-backend', type: 'combo', choices : ['yes', 'no', 'auto'], value : 'auto',
   description : 'Enable the cloudprint print backend')
+option('enable-xinerama', type: 'combo', choices : ['yes', 'no', 'auto'], value : 'auto',
+  description : 'Enable support for the Xinerama extension')


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