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?
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You cannot. Copy the header and add extern yourself.
Dark Falcon
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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 Oct 16 '09 at 00:28
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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
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