added CMake configuration files

eo/ConfigureChecks.cmake

@@ -0,0 +1,33 @@
+
+# NOTE: only add something here if it is really needed by EO
+
+include(CheckIncludeFile)
+include(CheckIncludeFiles)
+include(CheckSymbolExists)
+include(CheckFunctionExists)
+include(CheckLibraryExists)
+
+check_library_exists(m   cos "cos in libm" HAVE_LIBM) 
+
+check_include_files(cmath.h  "cmath.h"      HAVE_CMATH_H)               
+check_include_files(stdio.h  "stdio.h"      HAVE_STDIO_H)              
+check_include_files(stdlib.h "stdlib.h"     HAVE_STDLIB_H)                
+check_include_files(string.h  "string.h"    HAVE_STRING_H)                  
+check_include_files(strings.h "strings.h"   HAVE_STRINGS_H)                   
+check_include_files(malloc.h  "malloc.h"    HAVE_MALLOC_H)                    
+check_include_files(limits.h  "limits.h"    HAVE_LIMITS_H)                   
+check_include_files(unistd.h  "unistd.h"    HAVE_UNISTD_H)                  
+check_include_files(stdint.h  "stdint.h"    HAVE_STDINT_H) 
+
+
+# Use check_symbol_exists to check for symbols in a reliable
+# cross-platform manner.  It accounts for different calling
+# conventions and the possibility that the symbol is defined as a
+# macro.  Note that some symbols require multiple includes in a
+# specific order.  Refer to the man page for each symbol for which a
+# check is to be added to get the proper set of headers. Example :
+
+#check_symbol_exists(asymbol          "symbole.h"                 HAVE_SYMBOLE)      
+
+
+