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=${if_topsrcdir}/libstdc++-v3
  26 else
  27   libstdcxx_srcdir=${if_topsrcdir}/libstdc++
  28 fi
  29
  30 echo "${libstdcxx_srcdir} is where"
  31 if [ -f ${libstdcxx_srcdir}/Makefile.in ]; then
  32 # We check libstdc++ for libstdcxx_interface.
  33 libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/Makefile.in | sed 's/INTERFACE[      ]*=[    ]*\(.*\)/\1/'`
  34 else
  35 libstdcxx_interface=
  36 fi
  37
  38 if [ -f ${if_topsrcdir}/gcc/cp/Makefile.in ]; then
  39 # We check gcc/cp for cxx_interface.
  40 cxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/gcc/cp/Makefile.in | sed 's/INTERFACE[         ]*=[    ]*\(.*\)/\1/'`
  41 else
  42 cxx_interface=
  43 fi
  44
  45 # The trickiest part is libc_interface.
  46 if [ -z "${libc_interface}" ]
  47 then
  48   case ${target_os} in
  49   *linux*libc1*|*linux*libc5*)
  50     case ${target_alias} in
  51     *alpha*|*powerpc*)
  52       libc_interface=-libc5.9-
  53       ;;
  54     *)
  55       libc_interface=-libc5-
  56       ;;
  57     esac
  58     ;;
  59   *linux*gnu*)
  60     # We have to work harder to figure it out.
  61     if [ ${target_alias} = ${build_alias} ]
  62     then
  63       dummy=if$$
  64       cat >$dummy.c <<EOF
  65 #include <features.h>
  66 main(argc, argv)
  67      int argc;
  68      char *argv[];
  69 {
  70   printf("%d\n", __GLIBC_MINOR__);
  71   return 0;
  72 }
  73 EOF
  74       ${CC-cc} $dummy.c -o $dummy 2>/dev/null
  75       if [ "$?" = 0 ]
  76       then
  77         libc_interface=-libc6.`./$dummy`-
  78         rm -f $dummy.c $dummy
  79       else
  80         # It should never happen.
  81         echo "Cannot find the GNU C library minor version number." >&2
  82         rm -f $dummy.c $dummy
  83         exit 1
  84       fi
  85     else
  86       # Cross compiling. Assume glibc 2.1.
  87       libc_interface=-libc6.1-
  88     fi
  89     ;;
  90   *)
  91     libc_interface=-
  92     ;;
  93   esac
  94 fi