* configure.ac:

    + First try to detect the OS X native dynamic linker before falling
      back to dlfcn.h.
    + Enhanced the dlopen-style loader detection.
    + Added a check for HP-UX's shl_* functins.
  * src/misc/modules_plugin.h.in:
    + Support for the dylib dynamic loader on OS X.
    + Support for the shl dynamic loader on HP-UX.

configure.ac

 dnl Autoconf settings for vlc
-dnl $Id: configure.ac,v 1.81 2003/10/04 10:54:45 gbazin Exp $
+dnl $Id: configure.ac,v 1.82 2003/10/04 11:17:04 sam Exp $
 
 AC_INIT(vlc,0.6.3-cvs)
 
@@ -348,9 +348,6 @@ AM_CONDITIONAL(BUILD_GETOPT, ${need_getopt})
 
 if test "${SYS}" != "mingw32"; then
 AC_TYPE_SIGNAL
-AC_CHECK_LIB(dl,dlopen,[
-  AX_ADD_LDFLAGS([vlc],[-ldl])
-])
 AC_CHECK_LIB(m,cos,[
   AX_ADD_LDFLAGS([imdct adjust distort a52tofloat32],[-lm])
 ])
@@ -362,6 +359,69 @@ AC_CHECK_LIB(m,sqrt,[
 ])
 fi # end "${SYS}" != "mingw32"
 
+dnl Check for dynamic plugins
+ac_cv_have_plugins=no
+
+# OS X style
+AC_CHECK_HEADERS(mach-o/dyld.h,
+  [AC_CHECK_FUNCS(NSLinkModule,
+    [AC_DEFINE(HAVE_DL_DYLD, 1, [Define if you have the Darwin dyld API])
+     ac_cv_have_plugins=yes])])
+
+# HP-UX style
+if test "${ac_cv_have_plugins}" = "no"; then
+  AC_CHECK_HEADERS(dl.h)
+  ac_cv_my_have_shl_load=no
+  AC_CHECK_FUNC(shl_load,
+   [ac_cv_my_have_shl_load=yes,
+    AC_CHECK_LIB(dld, shl_load,
+     [ac_cv_my_have_shl_load=yes
+      AX_ADD_LDFLAGS([vlc],[-ldld])])])
+  if test "${ac_cv_my_have_shl_load}" = "yes"; then
+    AC_DEFINE(HAVE_DL_SHL_LOAD, 1, [Define if you have the shl_load API])
+    ac_cv_have_plugins=yes
+  fi
+fi
+
+# Whatever style
+if test "${ac_cv_have_plugins}" = "no"; then
+  AC_CHECK_LIB(dld, dld_link,
+   [AX_ADD_LDFLAGS([vlc],[-ldld])
+    AC_DEFINE(HAVE_DL_DLD_LINK, 1, [Define if you have the GNU dld library])
+    ac_cv_have_plugins=yes])
+fi
+
+# Win32 style
+if test "${ac_cv_have_plugins}" = "no"; then
+  AC_CHECK_LIB(kernel32, main,
+   [AX_ADD_LDFLAGS([vlc],[-lkernel32])
+    ac_cv_have_plugins=yes])
+fi
+
+# BeOS style
+if test "${ac_cv_have_plugins}" = "no"; then
+  AC_CHECK_HEADERS(image.h,
+   [ac_cv_have_plugins=yes])
+fi
+
+# Only test for dlopen() if the others didn't work
+if test "${ac_cv_have_plugins}" = "no"; then
+  AC_CHECK_HEADERS(dlfcn.h sys/dl.h)
+  ac_cv_my_have_dlopen=no
+  AC_CHECK_FUNC(dlopen,
+    ac_cv_my_have_dlopen=yes,
+    AC_CHECK_LIB(dl, dlopen,
+      ac_cv_my_have_dlopen=yes
+      AX_ADD_LDFLAGS([vlc],[-ldl]),
+      AC_CHECK_LIB(svld, dlopen,
+        ac_cv_my_have_dlopen=yes
+        AX_ADD_LDFLAGS([vlc],[-lsvld]))))
+  if test "${ac_cv_my_have_dlopen}" = "yes"; then
+    AC_DEFINE(HAVE_DL_DLOPEN, 1, [Define if you have the dlopen API])
+    ac_cv_have_plugins=yes
+  fi
+fi
+
 if test "${SYS}" != "mingw32"; then
 dnl Check for pthreads - borrowed from XMMS
 THREAD_LIB=error
@@ -467,7 +527,6 @@ AC_EGREP_HEADER(strncasecmp,strings.h,[
 dnl Check for headers
 AC_CHECK_HEADERS(signal.h time.h errno.h stdint.h getopt.h strings.h inttypes.h sys/int_types.h wchar.h)
 AC_CHECK_HEADERS(sys/sockio.h fcntl.h sys/types.h sys/time.h sys/times.h sys/ioctl.h sys/stat.h)
-AC_CHECK_HEADERS(dlfcn.h image.h)
 AC_CHECK_HEADERS(arpa/inet.h net/if.h netinet/in.h sys/socket.h)
 if test "${SYS}" != "mingw32"; then
 AC_CHECK_HEADERS(machine/param.h sys/shm.h)
@@ -3191,7 +3250,7 @@ AC_ARG_ENABLE(plugins,
 dnl Automagically disable plugins if there is no system support for
 dnl dynamically loadable files (.so, .dll, .dylib).
 dnl don't forget vlc-win32 still can load .dll as plugins
-if test "${ac_cv_header_dlfcn_h}" = "no" -a "${ac_cv_header_image_h}" = "no" -a "${SYS}" != "mingw32"
+if test "${ac_cv_have_plugins}" = "no"
 then
   echo "*** Your system doesn't have plugin support. All plugins will be built"
   echo "statically."

include/modules.h

@@ -2,7 +2,7 @@
  * modules.h : Module management functions.
  *****************************************************************************
  * Copyright (C) 2001 VideoLAN
- * $Id: modules.h,v 1.63 2003/01/19 03:16:24 sam Exp $
+ * $Id: modules.h,v 1.64 2003/10/04 11:17:04 sam Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *
@@ -30,10 +30,16 @@
 #define MODULE_SHORTCUT_MAX 10
 
 /* The module handle type. */
-#ifdef SYS_BEOS
+#if defined(HAVE_DL_DYLD)
+typedef NSModule module_handle_t;
+#elif defined(HAVE_IMAGE_H)
 typedef int module_handle_t;
-#else
+#elif defined(WIN32) || defined(UNDER_CE)
 typedef void * module_handle_t;
+#elif defined(HAVE_DL_DLOPEN)
+typedef void * module_handle_t;
+#elif defined(HAVE_DL_SHL_LOAD)
+typedef shl_t module_handle_t;
 #endif
 
 /*****************************************************************************

src/misc/modules.c

@@ -2,7 +2,7 @@
  * modules.c : Builtin and plugin modules management functions
  *****************************************************************************
  * Copyright (C) 2001 VideoLAN
- * $Id: modules.c,v 1.133 2003/09/26 11:30:06 gbazin Exp $
+ * $Id: modules.c,v 1.134 2003/10/04 11:17:04 sam Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *          Ethan C. Baldridge <BaldridgeE@cadmus.com>
@@ -53,16 +53,26 @@
 #   include <unistd.h>
 #endif
 
-#if defined(HAVE_DLFCN_H)                                /* Linux, BSD, Hurd */
-#   include <dlfcn.h>                        /* dlopen(), dlsym(), dlclose() */
-#   define HAVE_DYNAMIC_PLUGINS
-#elif defined(HAVE_IMAGE_H)                                          /* BeOS */
+#define HAVE_DYNAMIC_PLUGINS
+#if defined (HAVE_MACH_O_DYLD_H)
+#   include <mach-o/dyld.h>
+#elif defined (HAVE_IMAGE_H)                                         /* BeOS */
 #   include <image.h>
-#   define HAVE_DYNAMIC_PLUGINS
-#elif defined(UNDER_CE)
-#   define HAVE_DYNAMIC_PLUGINS
-#elif defined(WIN32)
-#   define HAVE_DYNAMIC_PLUGINS
+#elif defined (UNDER_CE)
+#   include <windows.h>
+#elif defined (WIN32)
+#   include <windows.h>
+#elif defined (HAVE_DL_DLOPEN)
+#   if defined (HAVE_DLFCN_H)                            /* Linux, BSD, Hurd */
+#       include <dlfcn.h>
+#   endif
+#   if defined (HAVE_SYS_DL_H)
+#       include <sys/dl.h>
+#   endif
+#elif defined (HAVE_DL_SHL_LOAD)
+#   if defined (HAVE_DL_H)
+#       include <dl.h>
+#   endif
 #else
 #   undef HAVE_DYNAMIC_PLUGINS
 #endif

src/misc/modules_plugin.h.in

@@ -2,7 +2,7 @@
  * modules_plugin.h : Plugin management functions used by the core application.
  *****************************************************************************
  * Copyright (C) 2001 VideoLAN
- * $Id: modules_plugin.h.in,v 1.10 2003/07/01 12:50:56 sam Exp $
+ * $Id: modules_plugin.h.in,v 1.11 2003/10/04 11:17:04 sam Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *
@@ -33,7 +33,35 @@
  *****************************************************************************/
 static int module_load( const MYCHAR * psz_filename, module_handle_t * handle )
 {
-#ifdef SYS_BEOS
+#if defined(HAVE_DL_DYLD)
+    NSModule handle;
+    NSObjectFileImage image;
+    NSObjectFileImageReturnCode ret;
+
+    ret = NSCreateObjectFileImageFromFile( psz_filename, &image );
+
+    if( ret != NSObjectFileImageSuccess )
+    {
+        return -1;
+    }
+
+    /* Open the dynamic module */
+    *handle = NSLinkModule( image, psz_filename,
+                            NSLINKMODULE_OPTION_RETURN_ON_ERROR );
+
+    if( !*handle )
+    {
+        NSLinkEditErrors errors;
+        const char *psz_file, *psz_err;
+        int i_errnum;
+        NSLinkEditError( &errors, &i_errnum, &psz_file, &psz_err );
+        return -1; /* err */
+    }
+
+    /* Destroy our image, we won't need it */
+    NSDestroyObjectFileImage( image );
+
+#elif defined(HAVE_IMAGE_H)
     *handle = load_add_on( psz_filename );
     return( *handle < 0 );
 
@@ -41,7 +69,7 @@ static int module_load( const MYCHAR * psz_filename, module_handle_t * handle )
     *handle = LoadLibrary( psz_filename );
     return( *handle == NULL );
 
-#elif defined(RTLD_NOW)
+#elif defined(HAVE_DL_DLOPEN) && defined(RTLD_NOW)
     /* static is OK, we are called atomically */
     static vlc_bool_t b_kde = VLC_FALSE;
 
@@ -71,10 +99,17 @@ static int module_load( const MYCHAR * psz_filename, module_handle_t * handle )
     *handle = dlopen( psz_filename, RTLD_NOW );
     return( *handle == NULL );
 
-#else
+#elif defined(HAVE_DL_DLOPEN) && defined(DL_LAZY)
     *handle = dlopen( psz_filename, DL_LAZY );
     return( *handle == NULL );
 
+#elif defined(HAVE_DL_SHL_LOAD)
+    *handle = shl_load( psz_filename, BIND_IMMEDIATE | BIND_NONFATAL, NULL );
+    return( *handle == NULL );
+
+#else
+    return -1;
+
 #endif
 }
 
@@ -87,15 +122,21 @@ static int module_load( const MYCHAR * psz_filename, module_handle_t * handle )
  *****************************************************************************/
 static void module_unload( module_handle_t handle )
 {
-#ifdef SYS_BEOS
+#if defined(HAVE_DL_DYLD)
+    NSUnLinkModule( handle, FALSE );
+
+#elif defined(HAVE_IMAGE_H)
     unload_add_on( handle );
 
 #elif defined(WIN32) || defined(UNDER_CE)
     FreeLibrary( handle );
 
-#else
+#elif defined(HAVE_DL_DLOPEN)
     dlclose( handle );
 
+#elif defined(HAVE_DL_SHL_LOAD)
+    shl_unload( handle );
+
 #endif
     return;
 }
@@ -110,7 +151,11 @@ static void module_unload( module_handle_t handle )
 static void * _module_getsymbol( module_handle_t handle,
                                  const char * psz_function )
 {
-#ifdef SYS_BEOS
+#if defined(HAVE_DL_DYLD)
+    NSSymbol sym = NSLookupSymbolInModule( handle, psz_function );
+    return NSAddressOfSymbol( sym );
+
+#elif defined(HAVE_IMAGE_H)
     void * p_symbol;
     if( B_OK == get_image_symbol( handle, psz_function,
                                   B_SYMBOL_TYPE_TEXT, &p_symbol ) )
@@ -131,9 +176,14 @@ static void * _module_getsymbol( module_handle_t handle,
 #elif defined( WIN32 )
     return (void *)GetProcAddress( handle, (MYCHAR*)psz_function );
 
-#else
+#elif defined(HAVE_DL_DLOPEN)
     return dlsym( handle, psz_function );
 
+#elif defined(HAVE_DL_SHL_LOAD)
+    void *p_sym;
+    shl_findsym( &handle, psz_function, TYPE_UNDEFINED, &p_sym );
+    return p_sym;
+
 #endif
 }
 
@@ -168,7 +218,10 @@ static void * module_getsymbol( module_handle_t handle,
  *****************************************************************************/
 static const char * module_error( char *psz_buffer )
 {
-#if defined(SYS_BEOS)
+#if defined(HAVE_DL_DYLD)
+    return "failed";
+
+#elif defined(HAVE_IMAGE_H)
     return "failed";
 
 #elif defined(UNDER_CE)
@@ -216,9 +269,12 @@ static const char * module_error( char *psz_buffer )
 
     return psz_buffer;
 
-#else
+#elif defined(HAVE_DL_DLOPEN)
     return dlerror();
 
+#elif defined(HAVE_DL_SHL_LOAD)
+    return strerror( errno );
+
 #endif
 }