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 if [ -f ${libstdcxx_srcdir}/Makefile.in ]; then
  31 # We check libstdc++ for libstdcxx_interface.
  32 libstdcxx_interface=`grep "^INTERFACE" ${libstdcxx_srcdir}/Makefile.in | sed 's/INTERFACE[      ]*=[    ]*\(.*\)/\1/'`
  33 else
  34 libstdcxx_interface=
  35 fi
  36
  37 if [ -f ${if_topsrcdir}/gcc/cp/Makefile.in ]; then
  38 # We check gcc/cp for cxx_interface.
  39 cxx_interface=`grep "^INTERFACE" ${if_topsrcdir}/gcc/cp/Makefile.in | sed 's/INTERFACE[         ]*=[    ]*\(.*\)/\1/'`
  40 else
  41 cxx_interface=
  42 fi
  43
  44 # The trickiest part is libc_interface.
  45 if [ -z "${libc_interface}" ]
  46 then
  47   case ${target_os} in
  48   *linux*libc1*|*linux*libc5*)
  49     case ${target_alias} in
  50     *alpha*|*powerpc*)
  51       libc_interface=-libc5.9-
  52       ;;
  53     *)
  54       libc_interface=-libc5-
  55       ;;
  56     esac
  57     ;;
  58   *linux*gnu*)
  59     # We have to work harder to figure it out.
  60     if [ ${target_alias} = ${build_alias} ]
  61     then
  62       dummy=if$$
  63       cat >$dummy.c <<EOF
  64 #include <features.h>
  65 main(argc, argv)
  66      int argc;
  67      char *argv[];
  68 {
  69   printf("%d\n", __GLIBC_MINOR__);
  70   return 0;
  71 }
  72 EOF
  73       ${CC-cc} $dummy.c -o $dummy 2>/dev/null
  74       if [ "$?" = 0 ]
  75       then
  76         libc_interface=-libc6.`./$dummy`-
  77         rm -f $dummy.c $dummy
  78       else
  79         # It should never happen.
  80         echo "Cannot find the GNU C library minor version number." >&2
  81         rm -f $dummy.c $dummy
  82         exit 1
  83       fi
  84     else
  85       # Cross compiling. Assume glibc 2.2.
  86       libc_interface=-libc6.2-
  87     fi
  88     ;;
  89   *)
  90     libc_interface=-
  91     ;;
  92   esac
  93 fi