libkms: build the intel backend only when needed

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>

configure.ac

@@ -270,6 +270,9 @@ fi
 AM_CONDITIONAL(HAVE_LIBKMS, [test "x$LIBKMS" = xyes])
 
 AM_CONDITIONAL(HAVE_INTEL, [test "x$INTEL" = xyes])
+if test "x$INTEL" = xyes; then
+	AC_DEFINE(HAVE_INTEL, 1, [Have intel support])
+fi
 
 AM_CONDITIONAL(HAVE_VMWGFX, [test "x$VMWGFX" = xyes])
 if test "x$VMWGFX" = xyes; then

libkms/Makefile.am

@@ -15,7 +15,6 @@ libkms_la_LIBADD = ../libdrm.la
 libkms_la_SOURCES = \
 	internal.h \
 	linux.c \
-	intel.c \
 	dumb.c \
 	api.c
 
@@ -23,6 +22,10 @@ if HAVE_VMWGFX
 libkms_la_SOURCES += vmwgfx.c
 endif
 
+if HAVE_INTEL
+libkms_la_SOURCES += intel.c
+endif
+
 if HAVE_NOUVEAU
 libkms_la_SOURCES += nouveau.c
 endif

libkms/linux.c

@@ -103,25 +103,31 @@ linux_from_sysfs(int fd, struct kms_driver **out)
 	if (ret)
 		return ret;
 
+#ifdef HAVE_INTEL
 	if (!strcmp(name, "intel"))
 		ret = intel_create(fd, out);
+	else
+#endif
 #ifdef HAVE_VMWGFX
-	else if (!strcmp(name, "vmwgfx"))
+	if (!strcmp(name, "vmwgfx"))
 		ret = vmwgfx_create(fd, out);
+	else
 #endif
 #ifdef HAVE_NOUVEAU
-	else if (!strcmp(name, "nouveau"))
+	if (!strcmp(name, "nouveau"))
 		ret = nouveau_create(fd, out);
+	else
 #endif
 #ifdef HAVE_RADEON
-	else if (!strcmp(name, "radeon"))
+	if (!strcmp(name, "radeon"))
 		ret = radeon_create(fd, out);
+	else
 #endif
 #ifdef HAVE_EXYNOS
-	else if (!strcmp(name, "exynos"))
+	if (!strcmp(name, "exynos"))
 		ret = exynos_create(fd, out);
-#endif
 	else
+#endif
 		ret = -ENOSYS;
 
 	free(name);