config.if

   1 #! /dev/null
   2 # Don't call it directly. This shell script fragment is called to
   3 # determine:
   4 #
   5 #       1. libstcxx_interface: the interface name for libstdc++.
   6 #       2. cxx_interface: the interface name for c++.
   7 #       3. libc_interface: the interface name for libc.
   8 #
   9
  10 # Get the top level src dir.
  11 if [ -z "${topsrcdir}" -a -z "${top_srcdir}" ]
  12 then
  13   echo "Undefined top level src dir: topsrcdir and top_srcdir are empty" >&2
  14   exit 1
  15 fi
  16
  17 if [ -n "${topsrcdir}" ]
  18 then
  19   if_topsrcdir=${topsrcdir}
  20 else
  21   if_topsrcdir=${top_srcdir}
  22 fi
  23
  24 if [ "${enable_libstdcxx_v3}" = "yes" ] ; then
  25   libstdcxx_srcdir=${if_topsrcdir}/libstdc++-v3
  26   # We check libstdc++-v3/configure.in for libstdcxx_interface.
  27   libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/configure.in | sed 's/INTERFACE[   ]*=[    ]*\(.*\)/\1/'`
  28 else
  29   libstdcxx_srcdir=${if_topsrcdir}/libstdc++
  30   # We check libstdc++/Makefile.in for libstdcxx_interface.
  31   libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/Makefile.in | sed 's/INTERFACE[    ]*=[    ]*\(.*\)/\1/'`
  32 fi
  33 libstdcxx_incdir=g++-${libstdcxx_interface}
  34 # Used to version libstdc++ shared libraries
  35 cxx_interface=2
  36
  37 # The trickiest part is libc_interface.
  38 if [ -z "${libc_interface}" ]
  39 then
  40   case ${target_os} in
  41   *linux*libc1*|*linux*libc5*)
  42     case ${target_alias} in
  43     *alpha*|*powerpc*)
  44       libc_interface=-libc5.9-
  45       ;;
  46     *)
  47       libc_interface=-libc5-
  48       ;;
  49     esac
  50     ;;
  51   *linux*gnu*)
  52     # We have to work harder to figure it out.
  53     if [ ${target_alias} = ${build_alias} ]
  54     then
  55       dummy=if$$
  56       cat >$dummy.c <<EOF
  57 #include <features.h>
  58 main(argc, argv)
  59      int argc;
  60      char *argv[];
  61 {
  62   printf("%d\n", __GLIBC_MINOR__);
  63   return 0;
  64 }
  65 EOF
  66       ${CC-cc} $dummy.c -o $dummy 2>/dev/null
  67       if [ "$?" = 0 ]
  68       then
  69         libc_interface=-libc6.`./$dummy`-
  70         rm -f $dummy.c $dummy
  71       else
  72         # It should never happen.
  73         echo "Cannot find the GNU C library minor version number." >&2
  74         rm -f $dummy.c $dummy
  75         exit 1
  76       fi
  77     else
  78       # Cross compiling. Assume glibc 2.1.
  79       libc_interface=-libc6.1-
  80     fi
  81     ;;
  82   *)
  83     libc_interface=-
  84     ;;
  85   esac
  86 fi