[Mesa-stable] [PATCH] auxiliary/vl: Build vl_winsys_dri.c only when needed.

[Emil Velikov]

With commit c39dbfdd0f7(auxiliary/vl: bring back the VL code for the dri
targets) we did not fully consider users of dri-swrast alone. Thus we
ended up trying to compile the dri2 specific code on platform which lack
it - Cygwin for example.

Cc: "10.5" <mesa-stable at lists.freedesktop.org>
Cc: Jon TURNEY <jon.turney at dronecode.org.uk>
Reported-by: Jon TURNEY <jon.turney at dronecode.org.uk>
Signed-off-by: Emil Velikov <emil.l.velikov at gmail.com>
---

Hi Jon,

Can you give this patch a try. I realise it's longer solution than the 
one you sent, but imho this makes sense (in a way) considering all the 
craziness that we have around.

-Emil

 configure.ac                      | 10 +++++++++-
 src/gallium/auxiliary/Makefile.am |  4 ++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 351027b..65425cb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1577,11 +1577,19 @@ if test "x$enable_dri" = xyes -o \
         "x$enable_vdpau" = xyes -o \
         "x$enable_omx" = xyes -o \
         "x$enable_va" = xyes; then
-    PKG_CHECK_MODULES([VL], [x11-xcb xcb xcb-dri2 >= $XCBDRI2_REQUIRED])
     need_gallium_vl=yes
 fi
 AM_CONDITIONAL(NEED_GALLIUM_VL, test "x$need_gallium_vl" = xyes)
 
+if test "x$enable_xvmc" = xyes -o \
+        "x$enable_vdpau" = xyes -o \
+        "x$enable_omx" = xyes -o \
+        "x$enable_va" = xyes; then
+    PKG_CHECK_MODULES([VL], [x11-xcb xcb xcb-dri2 >= $XCBDRI2_REQUIRED])
+    need_gallium_vl_winsys=yes
+fi
+AM_CONDITIONAL(NEED_GALLIUM_VL_WINSYS, test "x$need_gallium_vl_winsys" = xyes)
+
 if test "x$enable_xvmc" = xyes; then
     PKG_CHECK_MODULES([XVMC], [xvmc >= $XVMC_REQUIRED])
     enable_gallium_loader=$enable_shared_pipe_drivers
diff --git a/src/gallium/auxiliary/Makefile.am b/src/gallium/auxiliary/Makefile.am
index 453282a..6a628e9 100644
--- a/src/gallium/auxiliary/Makefile.am
+++ b/src/gallium/auxiliary/Makefile.am
@@ -74,6 +74,8 @@ libgalliumvl_la_CFLAGS = \
 libgalliumvl_la_SOURCES = \
 	$(VL_SOURCES)
 
+if NEED_GALLIUM_VL_WINSYS
+
 noinst_LTLIBRARIES += libgalliumvlwinsys.la
 
 libgalliumvlwinsys_la_CFLAGS = \
@@ -84,6 +86,8 @@ libgalliumvlwinsys_la_SOURCES = \
 
 endif
 
+endif
+
 EXTRA_DIST = \
 	SConscript \
 	indices/u_indices.c \
-- 
2.1.3