From cf6b6c0888da25b3cc165cbf44f4acac56d09b6e Mon Sep 17 00:00:00 2001
From: ZhangLe2016 <156590889+ZhangLe2016@users.noreply.github.com>
Date: Wed, 3 Apr 2024 01:14:02 +0800
Subject: [PATCH] [build] fix issue when executing `build-commissioner-libs.sh`
 multiple times (#250)

When developers run the `build-commissioner-libs.sh` script multiple
times, they might see the following error during compiling the
libevent:

error: call to undeclared function 'pipe2'; ISO C99 and later do not
support implicit function declarations ...

In fact, we did not use pip2 in libevent. We can turn it off by using
the macro EVENT_HAVE-PIPE2=0
---
 third_party/libevent/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/third_party/libevent/CMakeLists.txt b/third_party/libevent/CMakeLists.txt
index 60e9d68d2..1fe43fc0e 100644
--- a/third_party/libevent/CMakeLists.txt
+++ b/third_party/libevent/CMakeLists.txt
@@ -36,6 +36,7 @@ set(EVENT__DISABLE_SAMPLES ON CACHE BOOL "libevent disable samples" FORCE)
 set(EVENT__DISABLE_REGRESS ON CACHE BOOL "libevent disable regression tests" FORCE)
 set(EVENT__DISABLE_TESTS ON CACHE BOOL "libevent disable tests" FORCE)
 set(EVENT__DISABLE_BENCHMARK ON CACHE BOOL "libevent disable benchmark" FORCE)
+set(EVENT__HAVE_PIPE2 OFF CACHE BOOL "disable use of pipe2 in libevent" FORCE)
 add_subdirectory(repo)
 
 target_include_directories(event_core