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.
This commit is contained in:
Holger Freyther 2009-06-08 10:32:54 +00:00
parent c7aa3c4f79
commit 6d9f77acd0
3 changed files with 51 additions and 1 deletions

View File

@ -18,6 +18,21 @@ AC_HEADER_STDC
dnl Checks for typedefs, structures and compiler characteristics
# The following test is taken from WebKit's webkit.m4
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fvisibility=hidden "
AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
AC_COMPILE_IFELSE([char foo;],
[ AC_MSG_RESULT([yes])
SYMBOL_VISIBILITY="-fvisibility=hidden"],
AC_MSG_RESULT([no]))
CFLAGS="$saved_CFLAGS"
AC_SUBST(SYMBOL_VISIBILITY)
dnl Generate the output
AM_CONFIG_HEADER(bscconfig.h)
AC_OUTPUT(
openbsc.pc
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 \
gsm_subscriber.h linuxlist.h msgb.h select.h tlv.h gsm_04_11.h \
timer.h misdn.h chan_alloc.h telnet_interface.h paging.h \
subchan_demux.h trau_frame.h e1_input.h trau_mux.h signal.h \
gsm_utils.h ipaccess.h rs232.h
gsm_utils.h ipaccess.h rs232.h openbscdefines.h

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@ -0,0 +1,35 @@
/*
* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef OPENBSCDEFINES_H
#define OPENBSCDEFINES_H
#ifdef BUILDING_ON_WINDOWS
#ifdef BUILDING_OPENBSC
#define BSC_API __declspec(dllexport)
#else
#define BSC_API __declspec(dllimport)
#endif
#else
#define BSC_API __attribute__((visibility("default")))
#endif
#endif