From 8ee4966ea54520730bc382dbb85e4e7c03cb531a Mon Sep 17 00:00:00 2001
From: r-value <i@rvalue.moe>
Date: Wed, 24 Nov 2021 12:34:23 +0800
Subject: [PATCH] Prefer `-pthread` flag for pthread

According to gcc doc, `-pthread` flag will link the program against
libraries like libatomic on demand. Using `-lpthread` in CFLAGS and
LDFLAGS causes absense of these libraries, thus failing to build on
architectures which needs soft atomic operation implementation.
---
 cmake/LinkHelpers.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cmake/LinkHelpers.cmake b/cmake/LinkHelpers.cmake
index 5b33d503..f4264aad 100644
--- a/cmake/LinkHelpers.cmake
+++ b/cmake/LinkHelpers.cmake
@@ -27,6 +27,7 @@ macro(target_link_static_threads TARGET)
     # use a statically link winpthread
     target_link_libraries("${TARGET}" PRIVATE "-Wl,-Bstatic,--whole-archive -lwinpthread -Wl,--no-whole-archive,-Bdynamic")
   else()
+    set(THREADS_PREFER_PTHREAD_FLAG TRUE)
     find_package(Threads REQUIRED)
     target_link_libraries("${TARGET}" PRIVATE ${CMAKE_THREAD_LIBS_INIT})
   endif()