build: fixup autoconf for cross-compiling (to OpenWRT)
MALLOC/REALLOC aren't used properly (no rpl_malloc), remove them
while at it, infer some sane ipforwarding method from the OS value.
(v2 on that, "==" is not a proper operator for standard "test")
diff --git a/configure.ac b/configure.ac
index 16e6d95..9536443 100755
--- a/configure.ac
+++ b/configure.ac
@@ -693,11 +693,9 @@
AC_FUNC_CHOWN
AC_FUNC_FNMATCH
AC_FUNC_FORK
-AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_FUNC_MKTIME
AC_FUNC_STRFTIME
-AC_FUNC_REALLOC
AC_FUNC_STAT
AC_FUNC_SELECT_ARGTYPES
AC_FUNC_STRFTIME
@@ -1009,10 +1007,18 @@
dnl check ipforward detect method
dnl -----------------------------
AC_CACHE_CHECK([ipforward method], [quagga_cv_ipforward_method],
-[for quagga_cv_ipforward_method in /proc/net/snmp /dev/ip /dev/null;
-do
- test x`ls $quagga_cv_ipforward_method 2>/dev/null` = x"$quagga_cv_ipforward_method" && break
-done
+[if test x$cross_compiling = xyes; then
+ if test x"$opsys" = x"gnu-linux"; then
+ quagga_cv_ipforward_method=/proc/net/snmp
+ else
+ quagga_cv_ipforward_method=/dev/ip
+ fi
+else
+ for quagga_cv_ipforward_method in /proc/net/snmp /dev/ip /dev/null;
+ do
+ test x`ls $quagga_cv_ipforward_method 2>/dev/null` = x"$quagga_cv_ipforward_method" && break
+ done
+fi
case $quagga_cv_ipforward_method in
"/proc/net/snmp") quagga_cv_ipforward_method="proc";;
"/dev/ip")