From 5041a5d5a574449638e7579827d9b67ed1450b0d Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Mon, 18 Nov 2013 15:37:14 +0100
Subject: configure: Fix protoc-c detection

 * Use --with-protoc=command instead of env var
 * Error out when protoc is not found.
---
 configure.ac | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index fed636d..de8a9ff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,12 +13,18 @@ AM_INIT_AUTOMAKE([foreign dist-bzip2])
 
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
-AC_ARG_VAR([PROTOC_C], [path to protoc-c utility])
-
 # Check for programs
 AC_PROG_CC
 AC_PROG_SED
-AC_PATH_PROG([PROTOC_C], [protoc-c], [false])
+
+AC_ARG_WITH([protoc],
+	    [AS_HELP_STRING([--with-protoc=COMMAND],
+	                    [use the given protoc command])],
+	                    [PROTOC_C=$withval],
+	                    [AC_PATH_PROG([PROTOC_C], [protoc-c], [false])])
+
+AS_IF([test "x$PROTOC_C" = "xfalse"],
+      [AC_MSG_ERROR([protoc-c compiler not found])])
 
 AC_CHECK_LIB([ncurses], [tputs],
 	     [], [AC_MSG_ERROR([ncurses needed for libreadline])])
-- 
cgit