Description: on Linux, the pow10 function check fails.
             we should link against math library.
Author: Fathi Boudra <fabo@debian.org>

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,9 @@ CHECK_INCLUDE_FILES(byteswap.h HAVE_BYTE
 ########### Check functions ###########
 INCLUDE(CheckFunctionExists)
 CHECK_FUNCTION_EXISTS(tzset HAVE_TZSET)
+SET(CMAKE_REQUIRED_LIBRARIES "-lm")
 CHECK_FUNCTION_EXISTS(pow10 HAVE_POW10)
+SET(CMAKE_REQUIRED_LIBRARIES)
 CHECK_FUNCTION_EXISTS(setlocale HAVE_SETLOCALE)
 CHECK_FUNCTION_EXISTS(snprintf HAVE_SNPRINTF)