# Don't call it directly. This shell script fragment is called to
# determine:
#
-# 1. libstcxx_interface: the interface name for libstdc++.
-# 2. cxx_interface: the interface name for c++.
-# 3. libc_interface: the interface name for libc.
+# 1. libstcxx_incdir: the interface name for libstdc++.
+# 2. libc_interface: the interface name for libc.
#
# Get the top level src dir.
if_topsrcdir=${top_srcdir}
fi
-if [ -f ${if_topsrcdir}/libstdc++/Makefile.in ]; then
-# We check libstdc++ for libstdcxx_interface.
-libstdcxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/libstdc++/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
+# Set libstdcxx_incdir.
+# This is the same as gcc/configure.in and libstdc++-v3/acinclude.m4.
+gcc_version_trigger=${if_topsrcdir}/gcc/version.c
+gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*"\([^"]*\)".*/\1/'`
+gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
+libstdcxx_incdir=c++/${gcc_version}
# The trickiest part is libc_interface.
if [ -z "${libc_interface}" ]