don't use vfork() in wxExecute()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16880 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -3025,9 +3025,6 @@ if test "$wxUSE_ON_FATAL_EXCEPTION" = "yes" -a "$wxUSE_UNIX" = "yes"; then
     fi
 fi
 
-dnl check for vfork() (even if it's the same as fork() in modern Unices)
-AC_CHECK_FUNCS(vfork)
-
 dnl check for the function for temp files creation
 AC_CHECK_FUNCS(mkstemp mktemp, break)
 

setup.h.in

@@ -1046,9 +1046,6 @@
 /* Define if you have the usleep function.  */
 #undef HAVE_USLEEP
 
-/* Define if you have the vfork function.  */
-#undef HAVE_VFORK
-
 /* Define if you have the <X11/XKBlib.h> header file.  */
 #undef HAVE_X11_XKBLIB_H
 

setup.h_vms

@@ -1073,9 +1073,6 @@
 /* Define if you have the usleep function.  */
 #define HAVE_USLEEP 1
 
-/* Define if you have the vfork function.  */
-#define HAVE_VFORK 1
-
 /* Define if you have the <X11/XKBlib.h> header file.  */
 #undef HAVE_X11_XKBLIB_H
 

src/unix/utilsunx.cpp

@@ -563,12 +563,10 @@ long wxExecute(wxChar **argv,
     }
 
     // fork the process
-#ifdef HAVE_VFORK
-    pid_t pid = vfork();
-#else
+    //
+    // NB: do *not* use vfork() here, it completely breaks this code for some
+    //     reason under Solaris (and maybe others, although not under Linux)
     pid_t pid = fork();
-#endif
-
     if ( pid == -1 )     // error?
     {
         wxLogSysError( _("Fork failed") );