meson: rename symbol MITSHM to CONFIG_MITSHM

some bit better naming for config symbols.
Yet leaving the old one defined, until all drivers have kept up.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>

include/meson.build

@@ -223,6 +223,7 @@ if build_glx
     conf_data.set_quoted('DRI_DRIVER_PATH', dri_dep.get_variable(pkgconfig : 'dridriverdir'))
 endif
 conf_data.set('MITSHM', build_mitshm ? '1' : false)
+conf_data.set('CONFIG_MITSHM', build_mitshm ? '1' : false)
 
 # for backwards compat with drivers, still setting the old PANORAMIX symbol
 conf_data.set('PANORAMIX', build_xinerama ? '1' : false)

include/xorg-server.h.meson.in

@@ -58,6 +58,7 @@
 
 /* Support MIT-SHM Extension */
 #mesondefine MITSHM
+#mesondefine CONFIG_MITSHM
 
 /* Internal define for Xinerama */
 #mesondefine PANORAMIX