Added comment to compile for MSVC

Author: rijnb

README.md

@@ -55,10 +55,6 @@ To build the original Mapcode tool, execute:
     cd utility
     gcc -O mapcode.cpp -o mapcode
 
-(Or if you need to make sure there are no warnings:)
-
-    gcc -Wall -Wstrict-prototypes -Wshorten-64-to-32 -O mapcode.cpp -o mapcode
-
 For help, simply execute the binary file 'mapcode' without no arguments.
 This tool provides a rather extensive command-line interface to encode and
 decode Mapcodes. 
@@ -125,6 +121,14 @@ This produces the following help text:
            The result code is 0 when no error occurred, 1 if an input error occurred and 2
            if an internal error occurred.
 
+If you use **Microsoft Visual C++**, you may need to add the following defines to your preprocessor
+settings:
+
+    NO_POSIX_THREADS
+    _CRT_SECURE_NO_WARNINGS
+    _CRT_NONSTDC_NO_DEPRECATE
+
+
 # Release Notes
 
 ### 2.4.0

unittest/README.md

@@ -12,3 +12,12 @@ To build the unit tests, execute:
 To execute the tests, simply execute:
 
     ./unittest
+
+If you use **Microsoft Visual C++**, you may need to add the following defines to your preprocessor
+settings:
+
+    NO_POSIX_THREADS
+    _CRT_SECURE_NO_WARNINGS
+    _CRT_NONSTDC_NO_DEPRECATE
+
+

unittest/unittest.c

@@ -580,7 +580,7 @@ static int testEncodeAndDecode(const char *str, double y, double x, int localsol
                     int tc2 = -1;
                     int tcParent = -1;
                     int j;
-                    char *e = (char *) strchr(strResult, ' ');
+                    char *e = strchr(strResult, ' ');
                     found = 0;
                     if (e) {
                         *e = 0;
@@ -1420,7 +1420,7 @@ static int test_territories_csv(void) {
                             if (sep) {
                                 *sep = 0;
                             }
-                            match = (char *) strstr(territoryNames, s);
+                            match = strstr(territoryNames, s);
                             if (match == NULL ||
                                 (match[strlen(s)] != ' ' && match[strlen(s)] != 0 && match[strlen(s)] != ',' &&
                                  match[strlen(s)] != ')')) {

utility/README.md

@@ -20,3 +20,11 @@ As an example, type:
 This tool provides a rather extensive command-line interface to encode and
 decode Mapcodes.
 
+If you use **Microsoft Visual C++**, you may need to add the following defines to your preprocessor
+settings:
+
+    NO_POSIX_THREADS
+    _CRT_SECURE_NO_WARNINGS
+    _CRT_NONSTDC_NO_DEPRECATE
+
+