linux/gyp: Find missing symbols at build time, not runtime.

chrome/browser/ui/libgtk2ui/libgtk2ui.gyp

Index: chrome/browser/ui/libgtk2ui/libgtk2ui.gyp
diff --git a/chrome/browser/ui/libgtk2ui/libgtk2ui.gyp b/chrome/browser/ui/libgtk2ui/libgtk2ui.gyp
index d66b00c48ef1c6d2af58470a5ea2a1d29f395805..4145f6776221d0b4e70ad979579dacc33e1587be 100644
--- a/chrome/browser/ui/libgtk2ui/libgtk2ui.gyp
+++ b/chrome/browser/ui/libgtk2ui/libgtk2ui.gyp
@@ -19,10 +19,19 @@
         '../../../../build/linux/system.gyp:gtk',
         '../../../../build/linux/system.gyp:gtkprint',
         '../../../../components/components_resources.gyp:components_resources',
+        '../../../../content/content.gyp:content',
         '../../../../printing/printing.gyp:cups',
+        '../../../../printing/printing.gyp:printing',
         '../../../../skia/skia.gyp:skia',
+        '../../../../ui/aura/aura.gyp:aura',
         '../../../../ui/base/ui_base.gyp:ui_base',
+        '../../../../ui/events/events.gyp:events',
+        '../../../../ui/events/events.gyp:events_base',
+        '../../../../ui/gfx/gfx.gyp:gfx',
+        '../../../../ui/gfx/x/gfx_x11.gyp:gfx_x11',
+        '../../../../ui/native_theme/native_theme.gyp:native_theme',
         '../../../../ui/resources/ui_resources.gyp:ui_resources',
+        '../../../../ui/shell_dialogs/shell_dialogs.gyp:shell_dialogs',
         '../../../../ui/strings/ui_strings.gyp:ui_strings',
         '../../../../ui/views/views.gyp:views',
         '../../../chrome_resources.gyp:chrome_extra_resources',
@@ -88,6 +97,7 @@
         'x11_input_method_context_impl_gtk2.cc',
         'x11_input_method_context_impl_gtk2.h',
       ],
+      'link_settings': { 'libraries': [ '-lX11' ] },

[jamesr, 2015/01/17 01:21:25]

hmm, is there a reason you use link_settings here instead of depending on the
pkg-config pseudotarget? (i think build/linux/system.gyp:x11) ?

[Nico, 2015/01/17 02:01:43]

No. I looked at
https://code.google.com/p/chromium/codesearch#search/&q=lx11%20file:gyp&sq=pa...
and figured that's how this is done. Thanks, done.

       'conditions': [
         ['use_gconf==0', {
           'sources!': [