From f40fa661ac00c4975c0fdc604ce523600422decc Mon Sep 17 00:00:00 2001
From: Tim Ruffing <crypto@timruffing.de>
Date: Mon, 18 May 2020 12:27:14 +0200
Subject: [PATCH] autoconf: Use ":" instead of "dnl" as a noop

Summary:
Fixes #424.

This is a backport of libsecp256k1 [[https://github.com/bitcoin-core/secp256k1/pull/752 | PR752]]

Test Plan:
  ninja check-secp256k1

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D7588
---
 src/secp256k1/configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/secp256k1/configure.ac b/src/secp256k1/configure.ac
index 7a9b73705b..6180041418 100644
--- a/src/secp256k1/configure.ac
+++ b/src/secp256k1/configure.ac
@@ -225,7 +225,7 @@ if test x"$use_ecmult_static_precomputation" != x"no"; then
   AC_RUN_IFELSE(
     [AC_LANG_PROGRAM([], [])],
     [working_native_cc=yes],
-    [working_native_cc=no],[dnl])
+    [working_native_cc=no],[:])
 
   CFLAGS_FOR_BUILD="$CFLAGS"