openbscdefines.h: Add header file to control visibility of symbols
Add the hooks/configure detection to compile everything with -fvisibility=hidden and then make certain symbols visible. This will be used to make parts of the API public. There are no users yet but we should have some soon.
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configure.in
15
configure.in
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@ -18,6 +18,21 @@ AC_HEADER_STDC
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dnl Checks for typedefs, structures and compiler characteristics
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# The following test is taken from WebKit's webkit.m4
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -fvisibility=hidden "
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AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
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AC_COMPILE_IFELSE([char foo;],
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[ AC_MSG_RESULT([yes])
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SYMBOL_VISIBILITY="-fvisibility=hidden"],
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AC_MSG_RESULT([no]))
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CFLAGS="$saved_CFLAGS"
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AC_SUBST(SYMBOL_VISIBILITY)
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dnl Generate the output
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AM_CONFIG_HEADER(bscconfig.h)
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AC_OUTPUT(
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openbsc.pc
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include/openbsc/Makefile
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@ -2,4 +2,4 @@ noinst_HEADERS = abis_nm.h abis_rsl.h debug.h db.h gsm_04_08.h gsm_data.h \
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gsm_subscriber.h linuxlist.h msgb.h select.h tlv.h gsm_04_11.h \
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timer.h misdn.h chan_alloc.h telnet_interface.h paging.h \
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subchan_demux.h trau_frame.h e1_input.h trau_mux.h signal.h \
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gsm_utils.h ipaccess.h rs232.h
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gsm_utils.h ipaccess.h rs232.h openbscdefines.h
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@ -0,0 +1,35 @@
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/*
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* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef OPENBSCDEFINES_H
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#define OPENBSCDEFINES_H
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#ifdef BUILDING_ON_WINDOWS
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#ifdef BUILDING_OPENBSC
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#define BSC_API __declspec(dllexport)
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#else
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#define BSC_API __declspec(dllimport)
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#endif
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#else
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#define BSC_API __attribute__((visibility("default")))
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#endif
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#endif
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