From: Jochen Sprickerhof <git@jochen.sprickerhof.de>
Date: Sat, 1 Feb 2020 23:22:36 +0000 (+0100)
Subject: Link against atomic if needed (found on armel)
X-Git-Tag: archive/raspbian/1.12.1+dfsg-4+rpi1~1^2^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7ff9d773fc8aec8b90fe70b58d429c11c0f3da9e;p=pcl.git

Link against atomic if needed (found on armel)


Gbp-Pq: Name 0002-Link-against-atomic-if-needed-found-on-armel.patch
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5aa7f40..7de7093b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,6 +60,20 @@ elseif(MINGW)
   set(CMAKE_COMPILER_IS_MINGW 1)
 endif()
 
+# https://github.com/fish-shell/fish-shell/issues/5865
+include(CheckCXXSourceCompiles)
+CHECK_CXX_SOURCE_COMPILES("
+#include <atomic>
+struct big { int foo[64]; };
+std::atomic<big> x;
+int main() {
+   return x.load().foo[13];
+}"
+LIBATOMIC_NOT_NEEDED)
+IF (NOT LIBATOMIC_NOT_NEEDED)
+    SET(ATOMIC_LIBRARY "atomic")
+ENDIF()
+
 # Create a variable with expected default CXX flags
 # This will be used further down the road to check if the user explicitly provided CXX flags
 if(CMAKE_COMPILER_IS_MSVC)
diff --git a/cmake/pcl_targets.cmake b/cmake/pcl_targets.cmake
index 88ce7f90..680b3ff3 100644
--- a/cmake/pcl_targets.cmake
+++ b/cmake/pcl_targets.cmake
@@ -229,7 +229,7 @@ function(PCL_ADD_LIBRARY _name)
   endif()
 
   if((UNIX AND NOT ANDROID) OR MINGW)
-    target_link_libraries(${_name} m)
+    target_link_libraries(${_name} m ${ATOMIC_LIBRARY})
   endif()
 
   if(MINGW)