From 517e8659ab566b15cc409490a432e8935b164de8 Mon Sep 17 00:00:00 2001 From: Fabrice Fontaine Date: Fri, 24 Apr 2020 11:55:41 +0200 Subject: [PATCH] src/CMakeLists.txt: fix build on uclibc or musl Build of version 1.3.2 with uclibc or musl fails on: [ 58%] Linking C shared library libpaho-mqtt3c.so /home/buildroot/autobuild/instance-1/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.5.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: cannot find -lanl collect2: error: ld returned 1 exit status This is due to commit 21ffebcb749fc8bd8578df85550f03f74e571620 which added a link to anl which is not available on uclibc or musl. Fix this by checking if anl is found on the system before using it Fixes: - http://autobuild.buildroot.org/results/4beb96d43180813906578b42875a1c3d4a905ed7 Signed-off-by: Fabrice Fontaine [Retrieved from: https://github.com/eclipse/paho.mqtt.c/commit/517e8659ab566b15cc409490a432e8935b164de8] --- src/CMakeLists.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index fb367b37..95fd43e7 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -60,7 +60,13 @@ IF (WIN32) SET(LIBS_SYSTEM ws2_32 crypt32 RpcRT4) ELSEIF (UNIX) IF(CMAKE_SYSTEM_NAME MATCHES "Linux") - SET(LIBS_SYSTEM c dl pthread anl rt) + SET(LIBS_SYSTEM c dl pthread rt) + # anl is only available with glibc so check if it is found before using + # it or build will fail on uclibc or musl + FIND_LIBRARY(LIB_ANL anl) + IF(LIB_ANL) + SET(LIBS_SYSTEM "${LIBS_SYSTEM} ${LIB_ANL}") + ENDIF() ADD_DEFINITIONS(-D_GNU_SOURCE -fvisibility=hidden) ELSEIF (CMAKE_SYSTEM_NAME MATCHES "Android") SET(LIBS_SYSTEM c dl)