File 0001-Find-and-link-against-pthread.patch of Package sdbus-cpp

From 6c2bbdfa433305af912e053abf6cbc69642ca684 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <luca.boccassi@microsoft.com>
Date: Thu, 1 Apr 2021 11:57:58 +0100
Subject: [PATCH] Find and link against pthread

Building on SUSE fails, as std::thread usage requires linking
against pthread:

/usr/bin/c++ -fPIC -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -DNDEBUG -O3 -DNDEBUG -flto=auto -Wl,--as-needed -Wl,--no-undefined -Wl,-z,now -shared -Wl,-soname,libsdbus-c++.so.0 -o libsdbus-c++.so.0.8.3 CMakeFiles/sdbus-c++-objlib.dir/src/Connection.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Error.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Message.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Object.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Proxy.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Types.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/Flags.cpp.o CMakeFiles/sdbus-c++-objlib.dir/src/VTableUtils.c.o CMakeFiles/sdbus-c++-objlib.dir/src/SdBus.cpp.o  /usr/lib64/libsystemd.so
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /tmp/libsdbus-c++.so.0.8.3.uWoUml.ltrans0.ltrans.o: in function `sdbus::internal::Connection::enterEventLoopAsync()':
<artificial>:(.text+0x2bb): undefined reference to `pthread_create'
/usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /tmp/libsdbus-c++.so.0.8.3.uWoUml.ltrans0.ltrans.o: in function `non-virtual thunk to sdbus::internal::Connection::enterEventLoopAsync()':
<artificial>:(.text+0x37a): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 90a7a3a..80f4a51 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,9 @@ else()
     include(cmake/LibsystemdExternalProject.cmake)
 endif()
 
+# Required for std::thread
+find_package(Threads REQUIRED)
+
 #-------------------------------
 # SOURCE FILES CONFIGURATION
 #-------------------------------
@@ -108,6 +111,7 @@ if(BUILD_LIBSYSTEMD)
     add_dependencies(sdbus-c++-objlib LibsystemdBuildProject)
 endif()
 target_link_libraries(sdbus-c++-objlib PUBLIC Systemd::Libsystemd)
+target_link_libraries(sdbus-c++-objlib PUBLIC Threads::Threads)
 
 add_library(sdbus-c++)
 target_include_directories(sdbus-c++ PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-- 
2.29.2