nuttx-apps/examples/hello/hello_main.c
Gregory Nutt 922283ee5d Squashed commit of the following:
Merged in masayuki2009/nuttx.apps/loadable_app (pull request #148)

    loadable app support

    * apps: Introduce a build system for loadable apps for nsh.

        This PR consits of following changes. (NOTE: Changes to each
        application will be provided separately)

        apps/nshlib/Kconfig:
        Add 'option modules' to NSH_FILE_APPS so that a user can change
        an application configuration to tristate (y/n/m)

        apps/Make.defs:
        Override COMPILE and COMPILEXX macros to compile loadable apps.
        To make loadable apps, -DLOADABLE_APP is added to the flags.
        Also, introduce ELFLD to link a lodable app.
        Please note that the variable 'LOADABLE' must be defined in
        each application Makefile if you want to make a loadable app.

        apps/Application.mk:
        Add .build target in case of 'LOADABLE=y' which is used to
        link a final loadable application and install the app to
        apps/bin.

        apps/Makefile:
        Add SYMTABSRC and SYMTABOBJ variables for loadable apps which
        will be generated under the apps directory.
        Add make_symbols target which will be called when all applications
        are installed to generate symtab_app.c which is used for
        nsh to inform symbol information to the NuttX kernel.

        Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

    * apps/examples/hello: Apply changes to support a lodable app.

        Kconfig:
        Change the application state from bool to tristate

        Make.defs:
        Change the condition to build. By default, the application is
        not selected (i.e. 'n'), so if other states (i.e. y/m) are
        selected, the application will be compiled.

        Makefile:
        If the application is specified to 'm', the variable 'LOADABLE'
        must be defined here. Also note that other variables (PRIORITY
        and STACKSIZE) can only be used for built-in apps.

        hello_main.c
        Add LOADABLE_APP condition to main().

        Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

    * apps/examples/helloxx: Apply changes to support a lodable app.

        Kconfig:
        Change the application state from bool to tristate

        Make.defs:
        Change the condition to build. By default, the application is
        not selected (i.e. 'n'), so if other states (i.e. y/m) are
        selected, the application will be compiled.

        Makefile:
        If the application is specified to 'm', the variable 'LOADABLE'
        must be defined here. Also note that other variables (PRIORITY
        and STACKSIZE) can only be used for built-in apps.

        helloxx_main.c
        Add LOADABLE_APP condition to main().

        Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

    Approved-by: GregoryN <gnutt@nuttx.org>
2018-08-03 12:05:01 -06:00

60 lines
2.5 KiB
C

/****************************************************************************
* examples/hello/hello_main.c
*
* Copyright (C) 2008, 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* hello_main
****************************************************************************/
#if defined (CONFIG_BUILD_KERNEL) || defined (LOADABLE_APP)
int main(int argc, FAR char *argv[])
#else
int hello_main(int argc, char *argv[])
#endif
{
printf("Hello, World!!\n");
return 0;
}