submenu preparation in two methods encapsulated

[wxWidgets.git] / src / unix / utilsunx.cpp

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index c375770794adfcdde339e5d25ccb84bf67c08fab..fd816cb92010d867587cd19032d66c9dd353c1c3 100644 (file)
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -203,6 +203,16 @@ long wxExecute( const wxString& command, int flags, wxProcess *process )
 {
     wxCHECK_MSG( !command.IsEmpty(), 0, wxT("can't exec empty command") );
 
+#if wxUSE_THREADS
+    // fork() doesn't mix well with POSIX threads: on many systems the program
+    // deadlocks or crashes for some reason. Probably our code is buggy and
+    // doesn't do something which must be done to allow this to work, but I
+    // don't know what yet, so for now just warn the user (this is the least we
+    // can do) about it
+    wxASSERT_MSG( wxThread::IsMain(),
+                    _T("wxExecute() can be called only from the main thread") );
+#endif // wxUSE_THREADS
+
     int argc = 0;
     wxChar *argv[WXEXECUTE_NARGS];
     wxString argument;
@@ -644,6 +654,11 @@ long wxExecute(wxChar **argv,
 
         execvp (*mb_argv, mb_argv);
 
+        fprintf(stderr, "execvp(");
+        for ( char **ppc = mb_argv; *ppc; ppc++ )
+            fprintf(stderr, "%s%s", ppc == mb_argv ? "" : ", ", *ppc);
+        fprintf(stderr, ") failed with error %d!\n", errno);
+
         // there is no return after successful exec()
         _exit(-1);