X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=autogen.sh;h=26e179361e3d35d6404ed94e25f1190f7bb9a6e7;hb=dc89faeace016d0fbd8314937d0335a2ae76de14;hp=faa02353ec743f16e03fb451c36aad5ec59b9adc;hpb=3fc66eda9f62ed5520e237ad6bad036d27bf96c2;p=libsigrok.git

diff --git a/autogen.sh b/autogen.sh
index faa02353..26e17936 100755
--- 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."