configure: Assume that dlfcn.h is available on Unix.

configure

@@ -7476,7 +7476,6 @@ for ac_header in \
 	asm/types.h \
 	asm/user.h \
 	dirent.h \
-	dlfcn.h \
 	elf.h \
 	float.h \
 	gettext-po.h \

configure.ac

@@ -447,7 +447,6 @@ AC_CHECK_HEADERS(\
 	asm/types.h \
 	asm/user.h \
 	dirent.h \
-	dlfcn.h \
 	elf.h \
 	float.h \
 	gettext-po.h \

include/config.h.in

@@ -59,9 +59,6 @@
    file. */
 #undef HAVE_DISKARBITRATION_DISKARBITRATION_H
 
-/* Define to 1 if you have the <dlfcn.h> header file. */
-#undef HAVE_DLFCN_H
-
 /* Define to 1 if you have the `dlinfo' function. */
 #undef HAVE_DLINFO
 

include/wine/port.h

@@ -46,13 +46,10 @@
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
 
-#include <direct.h>
 #include <errno.h>
-#include <io.h>
-#include <process.h>
 
-static inline void *dlopen(const char *name, int flags) { return NULL; }
-static inline void *dlsym(void *handle, const char *name) { return NULL; }
+#define dlopen(name,flags)   NULL
+#define dlsym(handle,name)   NULL
 static inline int dlclose(void *handle) { return 0; }
 static inline const char *dlerror(void) { return "No dlopen support on Windows"; }
 static inline int symlink(const char *from, const char *to) { errno = ENOSYS; return -1; }
@@ -67,19 +64,11 @@ static inline int symlink(const char *from, const char *to) { errno = ENOSYS; re
 #endif
 #endif
 
-#endif  /* _WIN32 */
-
-/****************************************************************
- * Macro definitions
- */
+#else
 
-#ifdef HAVE_DLFCN_H
 #include <dlfcn.h>
-#else
-#define RTLD_LAZY    0x001
-#define RTLD_NOW     0x002
-#define RTLD_GLOBAL  0x100
-#endif
+
+#endif  /* _WIN32 */
 
 /****************************************************************
  * Constants