if_topsrcdir=${top_srcdir}
fi
-if [ "${enable_libstdcxx_v3}" = "yes" ] ; then
- libstdcxx_srcdir=${if_topsrcdir}/libstdc++-v3
-else
- libstdcxx_srcdir=${if_topsrcdir}/libstdc++
-fi
-
-if [ -f ${libstdcxx_srcdir}/Makefile.in ]; then
-# We check libstdc++ for libstdcxx_interface.
-libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/Makefile.in | sed 's/INTERFACE[ ]*=[ ]*\(.*\)/\1/'`
-else
-libstdcxx_interface=
-fi
-
-if [ -f ${if_topsrcdir}/gcc/cp/Makefile.in ]; then
-# We check gcc/cp for cxx_interface.
-cxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/gcc/cp/Makefile.in | sed 's/INTERFACE[ ]*=[ ]*\(.*\)/\1/'`
-else
-cxx_interface=
-fi
+libstdcxx_srcdir=${if_topsrcdir}/libstdc++-v3
+# We check libstdc++-v3/configure.in for libstdcxx_interface.
+libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/configure.in | sed 's/INTERFACE[ ]*=[ ]*\(.*\)/\1/'`
+libstdcxx_incdir=g++-${libstdcxx_interface}
+# Used to version libstdc++ shared libraries
+cxx_interface=2
# The trickiest part is libc_interface.
if [ -z "${libc_interface}" ]