1 dnl Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
2 dnl CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
4 dnl This library is free software; you can redistribute it and/or
5 dnl modify it under the terms of the GNU Lesser General Public
6 dnl License as published by the Free Software Foundation; either
7 dnl version 2.1 of the License.
9 dnl This library is distributed in the hope that it will be useful,
10 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
11 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 dnl Lesser General Public License for more details.
14 dnl You should have received a copy of the GNU Lesser General Public
15 dnl License along with this library; if not, write to the Free Software
16 dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 dnl See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
22 dnl @synopsis AC_C_DEPEND_FLAG
24 dnl define C_DEPEND_FLAG
25 dnl define CXX_DEPEND_FLAG
28 dnl @author Marc Tajchman
30 AC_DEFUN(AC_DEPEND_FLAG,
31 [AC_CACHE_CHECK(which flag for dependency information generation,
35 echo "conftest.o: conftest.c" > conftest.verif
36 echo "int main() { return 0; }" > conftest.c
39 for ac_C_DEPEND_FLAG in -xM -MM -M ; do
41 rm -f conftest.d conftest.err
42 ${CC-cc} ${ac_C_DEPEND_FLAG} -c conftest.c 1> conftest.d 2> conftest.err
43 if test -f conftest.u ; then
44 mv conftest.u conftest.d
48 diff -b -B conftest.d conftest.verif > conftest
49 if test ! -s conftest ; then
50 C_DEPEND_FLAG=${ac_C_DEPEND_FLAG}
55 dnl use gcc option -MG : asume unknown file will be construct later
56 rm -f conftest.d conftest.err
57 ${CC-cc} ${C_DEPEND_FLAG} -MG -c conftest.c 1> conftest.d 2> conftest.err
58 if test -f conftest.u ; then
59 mv conftest.u conftest.d
62 diff -b -B conftest.d conftest.verif > conftest
63 if test ! -s conftest ; then
64 C_DEPEND_FLAG=${C_DEPEND_FLAG}" -MG"
68 if test "x${C_DEPEND_FLAG}" = "x" ; then
69 echo "cannot determine flag (C language)"
73 echo -n " C : " ${C_DEPEND_FLAG}
76 echo "conftest.o: conftest.cxx" > conftest.verif
77 echo "int main() { return 0; }" > conftest.cxx
80 for ac_CXX_DEPEND_FLAG in -xM -MM -M ; do
82 rm -f conftest.d conftest.err
83 ${CXX-c++} ${ac_CXX_DEPEND_FLAG} -c conftest.cxx 1> conftest.d 2> conftest.err
84 if test -f conftest.u ; then
85 mv conftest.u conftest.d
89 diff -b -B conftest.d conftest.verif > conftest
90 if test ! -s conftest ; then
91 CXX_DEPEND_FLAG=${ac_CXX_DEPEND_FLAG}
96 dnl use g++ option -MG : asume unknown file will be construct later
97 rm -f conftest.d conftest.err
98 ${CXX-c++} ${CXX_DEPEND_FLAG} -MG -c conftest.cxx 1> conftest.d 2> conftest.err
99 if test -f conftest.u ; then
100 mv conftest.u conftest.d
103 diff -b -B conftest.d conftest.verif > conftest
104 if test ! -s conftest ; then
105 CXX_DEPEND_FLAG=${CXX_DEPEND_FLAG}" -MG"
110 if test "x${CXX_DEPEND_FLAG}" = "x" ; then
111 echo "cannot determine flag (C++ language)"
115 echo -n " C++ : " ${CXX_DEPEND_FLAG}
118 AC_SUBST(C_DEPEND_FLAG)
119 AC_SUBST(CXX_DEPEND_FLAG)