-
-dnl AC_LIB_PREPARE_MULTILIB creates a variable acl_libdirstem, containing
-dnl the basename of the libdir, either "lib" or "lib64".
-AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
-[
- dnl There is no formal standard regarding lib and lib64. The current
- dnl practice is that on a system supporting 32-bit and 64-bit instruction
- dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit
- dnl libraries go under $prefix/lib. We determine the compiler's default
- dnl mode by looking at the compiler's library search path. If at least
- dnl of its elements ends in /lib64 or points to a directory whose absolute
- dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the
- dnl default, namely "lib".
- acl_libdirstem=lib
- searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
- if test -n "$searchpath"; then
- acl_save_IFS="${IFS= }"; IFS=":"
- for searchdir in $searchpath; do
- if test -d "$searchdir"; then
- case "$searchdir" in
- */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
- *) searchdir=`cd "$searchdir" && pwd`
- case "$searchdir" in
- */lib64 ) acl_libdirstem=lib64 ;;
- esac ;;
- esac
- fi
- done
- IFS="$acl_save_IFS"
- fi
-])