raster pushed a commit to branch master.
http://git.enlightenment.org/core/efl.git/commit/?id=641b914c0a9c8a6d3ecae92fd702afba7c2218f5
commit 641b914c0a9c8a6d3ecae92fd702afba7c2218f5
Author: Carsten Haitzler (Rasterman) <ras...@rasterman.com>
Date: Mon Dec 30 09:14:50 2013 +0900
configure - add warning when enabling xcb
---
configure.ac | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/configure.ac b/configure.ac
index 0751b39..a939879 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4042,3 +4042,27 @@ if test "x${have_systemd_pkg}" = "xyes" -a
"x${want_systemd}" = "xno"; then
echo " ||----w |"
echo " || ||"
fi
+
+if test "x${with_x11}" = "xxcb"; then
+ echo "_____________________________________________________________________"
+ echo "!!-- WARNING --!!"
+ echo "_____________________________________________________________________"
+ echo "You have chosen to use XCB instead of Xlib. It is a myth that XCB"
+ echo "is amazingly faster than Xlib (when used sensibly). It can be"
+ echo "faster in a few corner cases on startup of an app, but it comes"
+ echo "with many downsides. One of those is more complex code inside"
+ echo "ecore_x, which is far less tested in XCB mode than Xlib. Also"
+ echo "the big catch is that OpenGL suppot basically requires Xlib anyway"
+ echo "so if you want OpenGL in X11, you need Xlib regardless and so you"
+ echo "gain nothing really in terms of speed and no savings in memory"
+ echo "because Xlib is still linked, loaded and used, BUT instead you"
+ echo "have OpenGL drivers working with an hybrid XCB/Xlib (mostly XCB)"
+ echo "toolkit and this is basically never tested by anyone working on"
+ echo "the OpenGL drivers, so you will have bugs. Do not enable XCB"
+ echo "and use OpenGL. XCB is only useful if you wish to shave a few Kb"
+ echo "off the memory footprint of a whole system and live with less"
+ echo "tested code, and possibly unimplemented features in ecore_x. To"
+ echo "remove the XCB setup, remove the --with-x11=xcb optiomn to"
+ echo "configure."
+ echo "_____________________________________________________________________"
+fi
--
