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genode/repos/libports/src/lib/qt5/qt_main.cc

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libports: add Qt5 Fixes #345.
2013-08-09 15:04:52 +02:00
/*
* \brief main() wrapper for customizing main()'s stack size
* \author Christian Prochaska
* \date 2008-08-20
*/
/*
Adjust file headers to refer to the AGPLv3
2017-02-20 13:23:52 +01:00
* Copyright (C) 2008-2017 Genode Labs GmbH
libports: add Qt5 Fixes #345.
2013-08-09 15:04:52 +02:00
*
* This file is part of the Genode OS framework, which is distributed
Adjust file headers to refer to the AGPLv3
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* under the terms of the GNU Affero General Public License version 3.
libports: add Qt5 Fixes #345.
2013-08-09 15:04:52 +02:00
*/
#ifdef QT_MAIN_STACK_SIZE
Simpify startup of dynamically linked binaries This patch removes the component_entry_point library, which used to proved a hook for the libc to intercept the call of the 'Component::construct' function. The mechansim has several shortcomings (see the discussion in the associated issue) and was complex. So we eventually discarded the approach in favor of the explicit handling of the startup. A regular Genode component provides a 'Component::construct' function, which is determined by the dynamic linker via a symbol lookup. For the time being, the dynamic linker falls back to looking up a 'main' function if no 'Component::construct' function could be found. The libc provides an implementation of 'Component::construct', which sets up the libc's task handling and finally call the function 'Libc::Component::construct' from the context of the appllication task. This function is expected to be provided by the libc-using application. Consequently, Genode components that use the libc have to implement the 'Libc::Component::construct' function. The new 'posix' library provides an implementation of 'Libc::Component::construct' that calls a main function. Hence, POSIX programs that merely use the POSIX API merely have to add 'posix' to the 'LIBS' declaration in their 'target.mk' file. Their execution starts at 'main'. Issue #2199
2016-12-22 15:01:19 +01:00
#include <libc/component.h>
libports: add Qt5 Fixes #345.
2013-08-09 15:04:52 +02:00
Simpify startup of dynamically linked binaries This patch removes the component_entry_point library, which used to proved a hook for the libc to intercept the call of the 'Component::construct' function. The mechansim has several shortcomings (see the discussion in the associated issue) and was complex. So we eventually discarded the approach in favor of the explicit handling of the startup. A regular Genode component provides a 'Component::construct' function, which is determined by the dynamic linker via a symbol lookup. For the time being, the dynamic linker falls back to looking up a 'main' function if no 'Component::construct' function could be found. The libc provides an implementation of 'Component::construct', which sets up the libc's task handling and finally call the function 'Libc::Component::construct' from the context of the appllication task. This function is expected to be provided by the libc-using application. Consequently, Genode components that use the libc have to implement the 'Libc::Component::construct' function. The new 'posix' library provides an implementation of 'Libc::Component::construct' that calls a main function. Hence, POSIX programs that merely use the POSIX API merely have to add 'posix' to the 'LIBS' declaration in their 'target.mk' file. Their execution starts at 'main'. Issue #2199
2016-12-22 15:01:19 +01:00
Genode::size_t Libc::Component::stack_size() { return QT_MAIN_STACK_SIZE; }
libports: add Qt5 Fixes #345.
2013-08-09 15:04:52 +02:00
#endif /* QT_MAIN_STACK_SIZE */
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