bnll_layer.cpp:15:35: error: ‘exp’ was not declared in this scope

src/layers/bnll_layer.cpp

@@ -1,5 +1,6 @@
 #include <algorithm>
 #include <vector>
+#include <cmath>
 
 #include "./bnll_layer.hpp"
 

src/layers/elu_layer.cpp

@@ -1,5 +1,6 @@
 #include <algorithm>
 #include <vector>
+#include <cmath>
 
 #include "./elu_layer.hpp"
 

src/layers/spp_layer.cpp

@@ -1,5 +1,6 @@
 #include <algorithm>
 #include <vector>
+#include <cmath>
 
 #include "./concat_layer.hpp"
 #include "./flatten_layer.hpp"

src/layers/tanh_layer.cpp

@@ -2,6 +2,7 @@
 // Adapted from ReLU layer code written by Yangqing Jia
 
 #include <vector>
+#include <cmath>
 
 #include "./tanh_layer.hpp"
 

tests/tests.cmake

@@ -1,6 +1,6 @@
 # cpp
 add_executable(run_net ${CMAKE_CURRENT_LIST_DIR}/run_net.cpp)
-target_link_libraries(run_net caffe)
+target_link_libraries(run_net caffe pthread)
 
 # c
 add_executable(run_net_c ${CMAKE_CURRENT_LIST_DIR}/run_net.c)