From 17d5dae239c8e8cca84afffd3672981379536491 Mon Sep 17 00:00:00 2001
From: Kai Tietz <kai.tietz@onevision.com>
Date: Tue, 20 Mar 2012 19:24:32 +0000
Subject: [PATCH]         PR ld/12742         * configure.in
 (AC_CHECK_HEADERS): Test for windows.h and dlfcn.h.         * plugin.c: Guard
 include of dlfcn.h if HAVE_DLFCN_H is defined.         Add windows.h header
 include if HAVE_WINDOWS_H is defined.         (dlerror): New static function
 if windows variant is used instead         of dlfcn.h.         (dlclose):
 Likewise.         (dlopen): Likewise.         (dlsym): Likewise.         *
 configure: Regenerated.         * config.in: Regenerated.

---
 bfd/ChangeLog    | 14 ++++++++++++++
 bfd/config.in    |  3 +++
 bfd/configure    | 16 ++++++++++++++++
 bfd/configure.in |  3 +++
 bfd/plugin.c     | 37 +++++++++++++++++++++++++++++++++++++
 5 files changed, 73 insertions(+)

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 735a0ba51d5..762633dfa65 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,17 @@
+2012-03-20  Kai Tietz  <ktietz@redhat.com>
+
+	PR ld/12742
+	* configure.in (AC_CHECK_HEADERS): Test for windows.h and dlfcn.h.
+	* plugin.c: Guard include of dlfcn.h if HAVE_DLFCN_H is defined.
+	Add windows.h header include if HAVE_WINDOWS_H is defined.
+	(dlerror): New static function if windows variant is used instead
+	of dlfcn.h.
+	(dlclose): Likewise.
+	(dlopen): Likewise.
+	(dlsym): Likewise.
+	* configure: Regenerated.
+	* config.in: Regenerated.
+
 2012-03-20  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/13880
diff --git a/bfd/config.in b/bfd/config.in
index 98157e13e0b..cb53b147413 100644
--- a/bfd/config.in
+++ b/bfd/config.in
@@ -245,6 +245,9 @@
 /* Define if <sys/procfs.h> has win32_pstatus_t. */
 #undef HAVE_WIN32_PSTATUS_T
 
+/* 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/bfd/configure b/bfd/configure
index cff9b265f1d..58a57baa59d 100755
--- a/bfd/configure
+++ b/bfd/configure
@@ -13508,6 +13508,22 @@ fi
 
 fi
 
+
+for ac_header in windows.h dlfcn.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+eval as_val=\$$as_ac_Header
+   if test "x$as_val" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether string.h and strings.h may both be included" >&5
 $as_echo_n "checking whether string.h and strings.h may both be included... " >&6; }
 if test "${gcc_cv_header_string+set}" = set; then :
diff --git a/bfd/configure.in b/bfd/configure.in
index c40c825438b..f4439157603 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -190,6 +190,9 @@ AC_CHECK_HEADERS(fcntl.h sys/file.h sys/time.h sys/stat.h)
 GCC_HEADER_STDINT(bfd_stdint.h)
 AC_HEADER_TIME
 AC_HEADER_DIRENT
+
+AC_CHECK_HEADERS(windows.h dlfcn.h)
+
 ACX_HEADER_STRING
 AC_CHECK_FUNCS(fcntl getpagesize setitimer sysconf fdopen getuid getgid fileno)
 AC_CHECK_FUNCS(strtoull)
diff --git a/bfd/plugin.c b/bfd/plugin.c
index 064e2731282..0a29e378d50 100644
--- a/bfd/plugin.c
+++ b/bfd/plugin.c
@@ -25,7 +25,13 @@
 #if BFD_SUPPORTS_PLUGINS
 
 #include <assert.h>
+#ifdef HAVE_DLFCN_H
 #include <dlfcn.h>
+#elif defined (HAVE_WINDOWS_H)
+#include <windows.h>
+#else
+#error Unknown how to handle dynamic-load-libraries.
+#endif
 #include <stdarg.h>
 #include "plugin-api.h"
 #include "sysdep.h"
@@ -34,6 +40,37 @@
 #include "libiberty.h"
 #include <dirent.h>
 
+#if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
+
+#define RTLD_NOW 0      /* Dummy value.  */
+
+static void *
+dlopen (const char *file, int mode ATTRIBUTE_UNUSED)
+{
+  return LoadLibrary (file);
+}
+
+static void *
+dlsym (void *handle, const char *name)
+{
+  return GetProcAddress (handle, name);
+}
+
+static int ATTRIBUTE_UNUSED
+dlclose (void *handle)
+{
+  FreeLibrary (handle);
+  return 0;
+}
+
+static const char *
+dlerror (void)
+{
+  return "Unable to load DLL.";
+}
+
+#endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)  */
+
 #define bfd_plugin_close_and_cleanup                  _bfd_generic_close_and_cleanup
 #define bfd_plugin_bfd_free_cached_info               _bfd_generic_bfd_free_cached_info
 #define bfd_plugin_new_section_hook                   _bfd_generic_new_section_hook
-- 
2.30.2