-AC_ARG_WITH(kcompat, [ --with-kcompat path Path to userspace kcompat source
-], [
- AC_CHECK_FILE("$withval/kcompat.h", [
- KCOMPAT_CFLAGS="-I$withval $URCU_CFLAGS"
- KCOMPAT_LIBS=
- ], AC_MSG_ERROR([Cannot find kcompat.h in kcompat directory]))
-], [
- PKG_CHECK_MODULES(KCOMPAT, [libkcompat], , [
- AC_MSG_ERROR([Must specify kcompat path.])])
-])
-AC_SUBST(KCOMPAT_CFLAGS)
-AC_SUBST(KCOMPAT_LIBS)
+# urcu - check if we just find the headers it out of the box.
+AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CFLAGS]=-Idir to specify their location.])])
+
+# urcu - check that URCU lib is available to compilation
+AC_CHECK_LIB([urcu-bp], [synchronize_rcu], [], [AC_MSG_ERROR([Cannot find liburcu-bp lib. Use [LDFLAGS]=-Ldir to specify its location.])])
+
+# kcompat
+
+AC_CHECK_HEADERS([kcompat.h], [], [AC_MSG_ERROR([Cannot find kcompat headers (kcompat.h). Use [CFLAGS]=-Idir to specify their location.])])
+
+AC_MSG_CHECKING([library format for the target system])
+case $target_cpu in
+ i386) LIBFORMAT="elf32-i386" ;;
+ i486) LIBFORMAT="elf32-i386" ;;
+ i586) LIBFORMAT="elf32-i386" ;;
+ i686) LIBFORMAT="elf32-i386" ;;
+ x86_64) LIBFORMAT="elf64-x86-64" ;;
+ ppc) LIBFORMAT="elf32-powerpc" ;;
+ ppc64) LIBFORMAT="elf64-powerpc" ;;
+ s390) LIBFORMAT="elf32-s390" ;;
+ s390x) LIBFORMAT="elf64-s390" ;;
+ *) AC_MSG_ERROR([unable to detect library format (unsupported architecture?)]) ;;
+esac
+AC_SUBST(LIBFORMAT)
+AC_MSG_RESULT($LIBFORMAT)