[glib/wip/meson] meson: Fix the build defining HAVE_RTLD_X

[Thibault Saunier <tsaunier src gnome org>]

commit 9748f5ffbb4c5c2f7c8660582fbb55b5ec302378
Author: Thibault Saunier <thibault saunier osg samsung com>
Date:   Fri Jun 23 12:36:38 2017 -0400

    meson: Fix the build defining HAVE_RTLD_X
    
    Otherwise RTLD_XXX get redefined.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784133

 config.h.meson |    3 +++
 meson.build    |   12 ++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/config.h.meson b/config.h.meson
index 7346b92..a3d090e 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -796,3 +796,6 @@
 
 #mesondefine MAJOR_IN_MKDEV
 #mesondefine MAJOR_IN_SYSMACROS
+#mesondefine HAVE_RTLD_LAZY
+#mesondefine HAVE_RTLD_NOW
+#mesondefine HAVE_RTLD_GLOBAL
diff --git a/meson.build b/meson.build
index 892a7ce..9938991 100644
--- a/meson.build
+++ b/meson.build
@@ -369,6 +369,18 @@ elif cc.has_header_symbol('sys/mkdev.h', 'major')
   glib_conf.set('MAJOR_IN_MKDEV', 1)
 endif
 
+if cc.has_header_symbol('dlfcn.h', 'RTLD_LAZY')
+  glib_conf.set('HAVE_RTLD_LAZY', 1)
+endif
+
+if cc.has_header_symbol('dlfcn.h', 'RTLD_NOW')
+  glib_conf.set('HAVE_RTLD_NOW', 1)
+endif
+
+if cc.has_header_symbol('dlfcn.h', 'RTLD_GLOBAL')
+  glib_conf.set('HAVE_RTLD_GLOBAL', 1)
+endif
+
 # Check whether to use statfs or statvfs
 # Some systems have both statfs and statvfs, pick the most "native" for these
 if have_func_statfs and have_func_statvfs