Fix --diable-shared --enable-plugins build breakage

Directories that don't use libtool need to add -ldl (on most *nix
hosts) to provide dlopen for libbfd.

config/
	* plugins.m4 (AC_PLUGINS): If plugins are enabled, add -ldl to
	LIBS via AC_SEARCH_LIBS.
gdb/
	* acinclude.m4 (GDB_AC_CHECK_BFD): Don't add -ldl.
	* config.in: Regenerate.
sim/ppc/
	* configure.ac: Invoke AC_PLUGINS.
	* config.in: Regenerate.

and regen lots of configure files.

4 files changed, 121 insertions, 0 deletions

diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog
index 3ec45a5..0ee34ef 100644
--- a/sim/ppc/ChangeLog
+++ b/sim/ppc/ChangeLog
@@ -1,3 +1,9 @@
+2014-08-19  Alan Modra  <amodra@gmail.com>
+
+	* configure.ac: Invoke AC_PLUGINS.
+	* configure: Regenerate.
+	* config.in: Regenerate.
+
 2014-03-10  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim_calls.c (sim_do_command): Add const to cmd.
diff --git a/sim/ppc/config.in b/sim/ppc/config.in
index 86a6825..b0c9e6f 100644
--- a/sim/ppc/config.in
+++ b/sim/ppc/config.in
@@ -43,6 +43,9 @@
    */
 #undef HAVE_DIRENT_H
 
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
 /* Define to 1 if you have the `dup' function. */
 #undef HAVE_DUP
 
@@ -281,6 +284,9 @@
 /* Define to 1 if you have the `unlink' function. */
 #undef HAVE_UNLINK
 
+/* Define to 1 if you have the <windows.h> header file. */
+#undef HAVE_WINDOWS_H
+
 /* Define to 1 if you have the <zlib.h> header file. */
 #undef HAVE_ZLIB_H
 
diff --git a/sim/ppc/configure b/sim/ppc/configure
index 50a16c9..5044383 100755
--- a/sim/ppc/configure
+++ b/sim/ppc/configure
@@ -767,6 +767,7 @@ enable_sim_xor_endian
 with_pkgversion
 with_bugurl
 with_zlib
+enable_plugins
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1430,6 +1431,7 @@ Optional Features:
   --enable-sim-trace			Specify whether tracing is supported.
   --enable-sim-warnings=opts		Extra CFLAGS for turning on compiler warnings except for idecode.o, semantics.o and psim.o
   --enable-sim-xor-endian=n		Specify number bytes involved in PowerPC XOR bi-endian mode (default 8).
+  --enable-plugins        Enable support for plugins
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -6899,6 +6901,110 @@ fi
   fi
 
 
+# BFD uses libdl when when plugins enabled.
+
+  maybe_plugins=no
+  for ac_header in dlfcn.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "dlfcn.h" "ac_cv_header_dlfcn_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_dlfcn_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_DLFCN_H 1
+_ACEOF
+ maybe_plugins=yes
+fi
+
+done
+
+  for ac_header in windows.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "windows.h" "ac_cv_header_windows_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_windows_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_WINDOWS_H 1
+_ACEOF
+ maybe_plugins=yes
+fi
+
+done
+
+
+  # Check whether --enable-plugins was given.
+if test "${enable_plugins+set}" = set; then :
+  enableval=$enable_plugins; case "${enableval}" in
+      no) plugins=no ;;
+      *) plugins=yes
+         if test "$maybe_plugins" != "yes" ; then
+	   as_fn_error "Building with plugin support requires a host that supports dlopen." "$LINENO" 5
+	 fi ;;
+     esac
+else
+  plugins=$maybe_plugins
+
+fi
+
+  if test "$plugins" = "yes"; then
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dlopen" >&5
+$as_echo_n "checking for library containing dlopen... " >&6; }
+if test "${ac_cv_search_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' dl; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if test "${ac_cv_search_dlopen+set}" = set; then :
+  break
+fi
+done
+if test "${ac_cv_search_dlopen+set}" = set; then :
+
+else
+  ac_cv_search_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_dlopen" >&5
+$as_echo "$ac_cv_search_dlopen" >&6; }
+ac_res=$ac_cv_search_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+  fi
+
+
 . ${srcdir}/../../bfd/configure.host
 
 case ${host} in
diff --git a/sim/ppc/configure.ac b/sim/ppc/configure.ac
index 9c3fa54..f1a7e06 100644
--- a/sim/ppc/configure.ac
+++ b/sim/ppc/configure.ac
@@ -670,6 +670,9 @@ AC_ARG_PROGRAM
 # using the same condition.
 AM_ZLIB
 
+# BFD uses libdl when when plugins enabled.
+AC_PLUGINS
+
 . ${srcdir}/../../bfd/configure.host
 
 case ${host} in