radeon: add cflags to decide whether to link libdrm_radeon or not.
You don't need libdrm_radeon for the legacy driver to build,
only for the experimental mm/cs paths.
diff --git a/configure.ac b/configure.ac
index a9a8d5a..ea2992d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -446,6 +446,8 @@
AC_SUBST([GALLIUM_DRIVER_DIRS])
AC_SUBST([GALLIUM_AUXILIARY_DIRS])
AC_SUBST([GALLIUM_STATE_TRACKERS_DIRS])
+AC_SUBST([RADEON_CFLAGS])
+AC_SUBST([RADEON_LDFLAGS])
dnl
dnl User supplied program configuration
@@ -573,6 +575,13 @@
GL_PC_REQ_PRIV="libdrm >= $LIBDRM_REQUIRED dri2proto >= $DRI2PROTO_REQUIRED"
DRI_PC_REQ_PRIV="libdrm >= $LIBDRM_REQUIRED"
+ PKG_CHECK_MODULES([LIBDRM_RADEON], [libdrm_radeon], HAVE_LIBDRM_RADEON=yes, HAVE_LIBDRM_RADEON=no)
+
+ if test "$HAVE_LIBDRM_RADEON" = yes; then
+ RADEON_CFLAGS="-DHAVE_LIBDRM_RADEON=1 $LIBDRM_RADEON_CFLAGS"
+ RADEON_LDFLAGS=$LIBDRM_RADEON_LIBS
+ fi
+
# find the DRI deps for libGL
if test "$x11_pkgconfig" = yes; then
# add xcb modules if necessary