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+======C Build string======
+This is useful when you are constantly compiling a program and can't remember what version is on what machine.  It will generate a C file that can then be compiled into your software.
+The executable was compiled under the cygwin environment so you will need this environment to be able to run this program. {{compiled.c}} {{compiled.exe}}
+Alternatively if you only have dos then you can download the {{cygwin1.dll}} and put this file in same location as the exe.
+<code c>
+ #include <stdio.h>
+ #include <time.h>
+ static const char *mon_name[12] = {
+ 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+ };
+ int main(void)
+ {
+ 	struct tm *timeptr;
+ 	time_t clock;
+ 	char s[200];
+ 	clock = time(NULL);
+ 	timeptr = localtime(&clock);
+ 	sprintf(s, "%d-%s-%02d %.2d:%.2d",
+ 		timeptr->tm_mday, mon_name[timeptr->tm_mon], timeptr->tm_year % 100,
+ 		timeptr->tm_hour, timeptr->tm_min );
+ 	printf("const char *compiled=\"%s\";\n", s);
+ 	return(0);
+ }
+</code>
+This would be called from your makefile like this.
+<code>
+ $(NAME).app : compile $(OBJ)
+        @echo linking...
+        @$(CC) -R0 $(OBJ) $(LIBS) @res/filer.list -o $@
+ compile:
+        @..\compiled >src/compiled.c
+</code>
+Then all you would have to do is make sure you reference the date constant using the following code block.
+<code c>
+  extern char *compiled;
+</code>
+{{tag>cybiko}}