grep -q is not portable

Solaris grep doesn't have -q

Use the grep we detected with AC_PROG_EGREP and just redirect stdout.

diff --git a/configure.ac b/configure.ac
index b1c83013b522d06d8dcda4fb644a1bfffd46a62c..45f5fafac12dd80cb7573c55d181f6c6e36c8721 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -83,7 +83,7 @@ AC_PATH_PROG([PROTOC], [protoc])
 have_protoc3="no"
 if test "x$PROTOC" != "x"; then
        AC_MSG_CHECKING([for protoc 3.0.0+])
-       if $PROTOC --version | grep -q libprotoc.3; then
+       if $PROTOC --version | $EGREP libprotoc.3 >/dev/null; then
                protoc3="yes (`$PROTOC --version`)"
                have_protoc3="yes"
        else