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
  34 if [ -f ${if_topsrcdir}/gcc/cp/Makefile.in ]; then
  35 # We check gcc/cp for cxx_interface.
  36 cxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/gcc/cp/Makefile.in | sed 's/INTERFACE[         ]*=[    ]*\(.*\)/\1/'`
  37 else
  38 cxx_interface=
  39 fi
  40
  41 # The trickiest part is libc_interface.
  42 if [ -z "${libc_interface}" ]
  43 then
  44   case ${target_os} in
  45   *linux*libc1*|*linux*libc5*)
  46     case ${target_alias} in
  47     *alpha*|*powerpc*)
  48       libc_interface=-libc5.9-
  49       ;;
  50     *)
  51       libc_interface=-libc5-
  52       ;;
  53     esac
  54     ;;
  55   *linux*gnu*)
  56     # We have to work harder to figure it out.
  57     if [ ${target_alias} = ${build_alias} ]
  58     then
  59       dummy=if$$
  60       cat >$dummy.c <<EOF
  61 #include <features.h>
  62 main(argc, argv)
  63      int argc;
  64      char *argv[];
  65 {
  66   printf("%d\n", __GLIBC_MINOR__);
  67   return 0;
  68 }
  69 EOF
  70       ${CC-cc} $dummy.c -o $dummy 2>/dev/null
  71       if [ "$?" = 0 ]
  72       then
  73         libc_interface=-libc6.`./$dummy`-
  74         rm -f $dummy.c $dummy
  75       else
  76         # It should never happen.
  77         echo "Cannot find the GNU C library minor version number." >&2
  78         rm -f $dummy.c $dummy
  79         exit 1
  80       fi
  81     else
  82       # Cross compiling. Assume glibc 2.1.
  83       libc_interface=-libc6.1-
  84     fi
  85     ;;
  86   *)
  87     libc_interface=-
  88     ;;
  89   esac
  90 fi