fix autogen.sh on OS X. This fixes bug #516.

diff --git a/autogen.sh b/autogen.sh
index faa02353ec743f16e03fb451c36aad5ec59b9adc..26e179361e3d35d6404ed94e25f1190f7bb9a6e7 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -58,7 +58,7 @@ aclocal ${ACLOCAL_DIR} || exit 1
 # Check the version of a specific autoconf macro that tends to cause problems.
 CXXMACROVERSION=$(
        grep -B 5 'm4_define(\[_AX_CXX_COMPILE_STDCXX_11_testbody\]' aclocal.m4 |
-       sed -nr 's/.*serial[[:space:]]+([[:digit:]]+).*/\1/p'
+       sed -n 's/.*serial[ \t][ \t]*\([0-9][0-9]*\).*/\1/p'
 )
 if [ "x$CXXMACROVERSION" = "x" ]; then
        echo "--- Warning: AX_CXX_COMPILE_STDCXX_11 macro not found."