configure: Support symbol visibility when available

[android-x86/external-libdrm.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 38508fd..bb0559a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@
 
 AC_PREREQ([2.63])
 AC_INIT([libdrm],
-        [2.4.48],
+        [2.4.56],
         [https://bugs.freedesktop.org/enter_bug.cgi?product=DRI],
         [libdrm])
 
@@ -185,6 +185,9 @@ AC_CANONICAL_HOST
 if test "x$LIBKMS" = xauto ; then
        case $host_os in
                linux*)         LIBKMS="yes" ;;
+               freebsd* | kfreebsd*-gnu)
+                               LIBKMS="yes" ;;
+               dragonfly*)     LIBKMS="yes" ;;
                *)              LIBKMS="no" ;;
        esac
 fi
@@ -363,6 +366,26 @@ AC_ARG_WITH([kernel-source],
            [kernel_source="$with_kernel_source"])
 AC_SUBST(kernel_source)
 
+dnl Add flags for gcc and g++
+if test "x$GCC" = xyes; then
+    # Enable -fvisibility=hidden if using a gcc that supports it
+    save_CFLAGS="$CFLAGS"
+    AC_MSG_CHECKING([whether $CC supports -fvisibility=hidden])
+    VISIBILITY_CFLAGS="-fvisibility=hidden"
+    CFLAGS="$CFLAGS $VISIBILITY_CFLAGS"
+    AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
+                   [VISIBILITY_CFLAGS=""; AC_MSG_RESULT([no])]);
+
+    # Restore CFLAGS; VISIBILITY_CFLAGS are added to it where needed.
+    CFLAGS=$save_CFLAGS
+
+    if test "x$VISIBILITY_CFLAGS" != x; then
+        AC_DEFINE(HAVE_VISIBILITY, 1, [Compiler has -fvisibility support])
+    fi
+
+    AC_SUBST([VISIBILITY_CFLAGS])
+fi
+
 AC_SUBST(WARN_CFLAGS)
 AC_CONFIG_FILES([
        Makefile