config.if

   1 #! /dev/null
   2 # Don't call it directly. This shell script fragment is called to
   3 # determine:
   4 #
   5 #       1. libstcxx_incdir: the interface name for libstdc++.
   6 #       2. libc_interface: the interface name for libc.
   7 #
   8
   9 # Get the top level src dir.
  10 if [ -z "${topsrcdir}" -a -z "${top_srcdir}" ]
  11 then
  12   echo "Undefined top level src dir: topsrcdir and top_srcdir are empty" >&2
  13   exit 1
  14 fi
  15
  16 if [ -n "${topsrcdir}" ]
  17 then
  18   if_topsrcdir=${topsrcdir}
  19 else
  20   if_topsrcdir=${top_srcdir}
  21 fi
  22
  23 # Set libstdcxx_incdir.
  24 # This is the same as gcc/configure.in and libstdc++-v3/acinclude.m4.
  25 if test -z "$gcc_version"; then
  26   if test -z "${gcc_version_trigger}" \
  27      && test -f ${if_topsrcdir}/gcc/version.c; then
  28     gcc_version_trigger=${if_topsrcdir}/gcc/version.c
  29   fi
  30   if test -f "${gcc_version_trigger}"; then
  31     gcc_version_full=`grep version_string "${gcc_version_trigger}" | sed -e 's/.*"\([^"]*\)".*/\1/'`
  32   else
  33     gcc_version_full=`$CC -v 2>&1 | sed -n 's/^gcc version //p'`
  34   fi
  35   gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
  36 fi
  37 libstdcxx_incdir=c++/${gcc_version}
  38
  39 # The trickiest part is libc_interface.
  40 if [ -z "${libc_interface}" ]
  41 then
  42   case ${target_os} in
  43   *linux*libc1*|*linux*libc5*)
  44     case ${target_alias} in
  45     *alpha*|*powerpc*)
  46       libc_interface=-libc5.9-
  47       ;;
  48     *)
  49       libc_interface=-libc5-
  50       ;;
  51     esac
  52     ;;
  53   *linux*gnu*)
  54     # We have to work harder to figure it out.
  55     if [ ${target_alias} = ${build_alias} ]
  56     then
  57       dummy=if$$
  58       cat >$dummy.c <<EOF
  59 #include <features.h>
  60 main(argc, argv)
  61      int argc;
  62      char *argv[];
  63 {
  64   printf("%d\n", __GLIBC_MINOR__);
  65   return 0;
  66 }
  67 EOF
  68       ${CC-cc} $dummy.c -o $dummy 2>/dev/null
  69       if [ "$?" = 0 ]
  70       then
  71         libc_interface=-libc6.`./$dummy`-
  72         rm -f $dummy.c $dummy
  73       else
  74         # It should never happen.
  75         echo "Cannot find the GNU C library minor version number." >&2
  76         rm -f $dummy.c $dummy
  77         exit 1
  78       fi
  79     else
  80       # Cross compiling. Assume glibc 2.1.
  81       libc_interface=-libc6.1-
  82     fi
  83     ;;
  84   *)
  85     libc_interface=-
  86     ;;
  87   esac
  88 fi