1 //========================================================================
5 // Dummy __main() function required for certain targets
7 //========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): jlarmour
44 // Contributors: jlarmour
46 // Purpose: Provide a default empty __main() function
47 // Description: Dummy __main() function which certain targets use
48 // to invoke constructors. But we invoke constructors
49 // explicitly from the linker scripts in eCos
52 //####DESCRIPTIONEND####
54 //========================================================================
58 #include <pkgconf/infra.h> // Configuration header
62 #include <cyg/infra/cyg_type.h> // Common type definitions and support
63 #include <cyg/infra/cyg_trac.h> // Default tracing support
71 CYG_REPORT_FUNCTION();
72 CYG_REPORT_FUNCARGVOID();
74 CYG_TRACE0( true, "This is the system default __main()" );
76 CYG_EMPTY_STATEMENT; // don't let it complain about doing nothing
82 // Versions of gcc/g++ after 3.0 (approx.), when configured for Linux
83 // native development (specifically, --with-__cxa_enable), have
84 // additional dependencies related to the destructors for static
85 // objects. When compiling C++ code with static objects the compiler
86 // inserts a call to __cxa_atexit() with __dso_handle as one of the
87 // arguments. __cxa_atexit() would normally be provided by glibc, and
88 // __dso_handle is part of crtstuff.c. Synthetic target applications
89 // are linked rather differently, so either a differently-configured
90 // compiler is needed or dummy versions of these symbols should be
91 // provided. If these symbols are not actually used then providing
92 // them is still harmless, linker garbage collection will remove them.
95 __cxa_atexit(void (*func)(void *), void *arg2, const void *arg3)
98 void *__dso_handle = (void* )&__dso_handle;
100 // gcc 3.2.2 (approx). The libsupc++ version of the new operator pulls
101 // in exception handling code, even when using the nothrow version and
102 // building with -fno-exceptions. libgcc_eh.a provides the necessary
103 // functions, but requires a dl_iterate_phdr() function. That is related
104 // to handling dynamically loaded code so is not applicable to eCos.
106 dl_iterate_phdr(void* arg1, void* arg2)
116 // EOF dummyxxmain.cxx