[glib] glib-init: statically assert that we have 8-bit bytes

[Simon McVittie <smcv src gnome org>]

commit 9060a85193a0e15f67568ea6cac3a082fbcab30f
Author: Simon McVittie <simon mcvittie collabora co uk>
Date:   Sun Jul 20 12:41:57 2014 +0100

    glib-init: statically assert that we have 8-bit bytes
    
    configure.ac assumes this.
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=730932

 configure.ac     |    1 +
 glib/glib-init.c |    3 +++
 2 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f5f23b7..6e22fcb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2812,6 +2812,7 @@ _______EOF
 
 
        ### this should always be true in a modern C/C++ compiler
+       ### and is statically asserted by glib-init.c
        cat >>$outfile <<_______EOF
 typedef signed char gint8;
 typedef unsigned char guint8;
diff --git a/glib/glib-init.c b/glib/glib-init.c
index df812c7..24efe9d 100644
--- a/glib/glib-init.c
+++ b/glib/glib-init.c
@@ -35,6 +35,9 @@
 /* This seems as good a place as any to make static assertions about platform
  * assumptions we make throughout GLib. */
 
+/* We do not support 36-bit bytes or other historical curiosities. */
+G_STATIC_ASSERT (CHAR_BIT == 8);
+
 /* We assume that data pointers are the same size as function pointers... */
 G_STATIC_ASSERT (sizeof (gpointer) == sizeof (GFunc));
 G_STATIC_ASSERT (_g_alignof (gpointer) == _g_alignof (GFunc));