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