diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c6f486..b54cd34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,7 @@ check_c_compiler_flag(-march=native SUPPORT_ARCH_NATIVE )
 
 
 find_library(MATH_LIB m)
+find_library(DL_LIB dl)
 
 macro(add_genopt _sourcelist _ggofile _basefile)
 
diff --git a/c_tools/CMakeLists.txt b/c_tools/CMakeLists.txt
index 22f2026..dcb353e 100644
--- a/c_tools/CMakeLists.txt
+++ b/c_tools/CMakeLists.txt
@@ -32,7 +32,7 @@ ENDIF (CAIROMMCONFIG_INCLUDE_PATH AND CAIROMM_INCLUDE_PATH AND SIGC_INCLUDE_PATH
 
 SET(ZOB_LIBS zobovTool 
   ${COSMOTOOL_LIBRARY} ${GSL_LIBRARIES}
-  ${NETCDF_LIBRARIES})
+  ${NETCDF_LIBRARIES} ${DL_LIB})
 
 
 include_directories(
diff --git a/external/cosmotool/src/h5_readFlash.hpp b/external/cosmotool/src/h5_readFlash.hpp
index abcf9aa..c4c8950 100644
--- a/external/cosmotool/src/h5_readFlash.hpp
+++ b/external/cosmotool/src/h5_readFlash.hpp
@@ -14,7 +14,8 @@ This file has been developped by P. M. Sutter.
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>
-#include <string.h>
+#include <string>
+#include <cstring>
 #include "hdf5_flash.h"
 #include "H5Cpp.h"
 
diff --git a/external/external_build.cmake b/external/external_build.cmake
index 5dddfac..bce5995 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -121,7 +121,7 @@ else(INTERNAL_HDF5)
   find_library(HDF5HL_LIBRARY hdf5_hl)
 endif (INTERNAL_HDF5)
 SET(CONFIGURE_CPP_FLAGS "${CONFIGURE_CPP_FLAGS} -I${HDF5_INCLUDE_PATH}")
-SET(CONFIGURE_LIBS_FLAGS "-ldl")
+SET(CONFIGURE_LIBS_FLAGS "${DL_LIB}")
 mark_as_advanced(HDF5_INCLUDE_PATH HDF5_LIBRARY HDF5_CPP_LIBRARY HDF5HL_LIBRARY HDF5HL_CPP_LIBRARY)
 
 ###############