https://smaugmuds.afkmods.com/index.php?a=rssfeed&t=4472 The largest Smaug community resource site. - en SmaugMuds 60 https://smaugmuds.afkmods.com/topic/undefined-reference-to-variable-4472/&p=21029#p21029 Not surprisingly, the error was exactly what the compiler had said. [quote=[url=http://www.mudbytes.net/index.php?a=topic&t=3160&p=52080#p52080]Tyche[/url]]All I see is a declaration of last_col. You don't define last_col anywhere in your program. Maybe this page will help: [url=http://sourcery.dyndns.org/wiki.cgi?TutorialFunctionDeclarationsAndDefinitions]TutorialFunctionDeclarationsAndDefinitions[/url] What "extern char last_col[2];" means to the compiler is that there exists a var https://smaugmuds.afkmods.com/topic/undefined-reference-to-variable-4472/&p=21029#p21029 Thu, 21 Oct 2010 21:40:36 CDT SmaugFUSS nobody@example.com (bobo the bee) https://smaugmuds.afkmods.com/topic/undefined-reference-to-variable-4472/&p=21028#p21028 (Also seen on [url=http://www.mudbytes.net/index.php?a=topic&t=3160&p=52073#p52073]MudBytes.net[/url]) So, in trying to add a new global variable to keep track of the last color used by the MUD, but I've run into a bit of an issue. The code itself compiles, up until the very end when I receive this error message: [code]$make -s smaug Compiling o/color.o.... o/color.o: In function `_Z11set_lastcolPc': .../quarulid/src/color.c:1878: undefined reference to `_last_col' .../quarulid/src/c https://smaugmuds.afkmods.com/topic/undefined-reference-to-variable-4472/&p=21028#p21028 Thu, 21 Oct 2010 19:40:23 CDT SmaugFUSS nobody@example.com (bobo the bee)