I need to include a header file that contains some global variables (not mine so I cannot change it).
How do I do this so that the variables within the included file are considered 'extern' in all but one case?
It's kind of nonstandard for header files to be written the way you describe for just this reason. Normally you'd want the header file to have every global declared with `extern`, and then have the actual variable storage declarations made in an implementation file elsewhere.
Carl Norum
2009-10-16 00:28:33
A:
If the variables are only declared in the header, but aren't assigned a value, then you might be able to do this, depending on the compiler. GCC, for example, has the -fno-common flag to control this behavior.
Mark Bessey
2009-10-16 00:58:22