autoconf: stop exporting internal wayland details

With version v1.15 the "code" option was deprecated in favour of
"private-code" or "public-code".

Before the interface symbol generated was exported (which is a bad idea
since it's internal implementation detail) and others may misuse it.

That was the case with libva approx. 1 year ago. Since then libva was
fixed, so we can finally hide it by using "private-code"

Inspired by similar xserver patch by Adam Jackson.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

configure.ac

@@ -1811,6 +1811,10 @@ for plat in $platforms; do
         PKG_CHECK_MODULES([WAYLAND_SCANNER], [wayland-scanner],
                           WAYLAND_SCANNER=`$PKG_CONFIG --variable=wayland_scanner wayland-scanner`,
                           WAYLAND_SCANNER='')
+        PKG_CHECK_EXISTS([wayland-scanner >= 1.15],
+                          AC_SUBST(SCANNER_ARG, 'private-code'),
+                          AC_SUBST(SCANNER_ARG, 'code'))
+
         if test "x$WAYLAND_SCANNER" = x; then
             AC_PATH_PROG([WAYLAND_SCANNER], [wayland-scanner], [:])
         fi

src/egl/Makefile.am

@@ -72,7 +72,7 @@ WL_DMABUF_XML = $(WAYLAND_PROTOCOLS_DATADIR)/unstable/linux-dmabuf/linux-dmabuf-
 
 drivers/dri2/linux-dmabuf-unstable-v1-protocol.c: $(WL_DMABUF_XML)
 	$(MKDIR_GEN)
-	$(AM_V_GEN)$(WAYLAND_SCANNER) code $< $@
+	$(AM_V_GEN)$(WAYLAND_SCANNER) $(SCANNER_ARG) $< $@
 
 drivers/dri2/linux-dmabuf-unstable-v1-client-protocol.h: $(WL_DMABUF_XML)
 	$(MKDIR_GEN)

src/egl/wayland/wayland-drm/Makefile.am

@@ -28,7 +28,7 @@ CLEANFILES = \
 	wayland-drm-server-protocol.h
 
 %-protocol.c : %.xml
-	$(AM_V_GEN)$(WAYLAND_SCANNER) code $< $@
+	$(AM_V_GEN)$(WAYLAND_SCANNER) $(SCANNER_ARG) $< $@
 
 %-server-protocol.h : %.xml
 	$(AM_V_GEN)$(WAYLAND_SCANNER) server-header $< $@

src/vulkan/Makefile.am

@@ -76,7 +76,7 @@ WL_DRM_XML = $(top_srcdir)/src/egl/wayland/wayland-drm/wayland-drm.xml
 
 wsi/wayland-drm-protocol.c : $(WL_DRM_XML)
 	$(MKDIR_GEN)
-	$(AM_V_GEN)$(WAYLAND_SCANNER) code $< $@
+	$(AM_V_GEN)$(WAYLAND_SCANNER) $(SCANNER_ARG) $< $@
 
 wsi/wayland-drm-client-protocol.h : $(WL_DRM_XML)
 	$(MKDIR_GEN)
@@ -86,7 +86,7 @@ WL_DMABUF_XML = $(WAYLAND_PROTOCOLS_DATADIR)/unstable/linux-dmabuf/linux-dmabuf-
 
 wsi/linux-dmabuf-unstable-v1-protocol.c : $(WL_DMABUF_XML)
 	$(MKDIR_GEN)
-	$(AM_V_GEN)$(WAYLAND_SCANNER) code $< $@
+	$(AM_V_GEN)$(WAYLAND_SCANNER) $(SCANNER_ARG) $< $@
 
 wsi/linux-dmabuf-unstable-v1-client-protocol.h : $(WL_DMABUF_XML)
 	$(MKDIR_GEN)