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Old 2020-12-08, 21:47   #1
bsquared's Avatar
Feb 2007

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Default gcc 10.2.0 behavior

A couple times now I have seen reports where gcc 10.2.0 failed to compile a project that older gcc versions (and icc) compiled just fine. They fail with errors in the linking stage; complaining about multiple definitions of global constants defined in headers (e.g., see here).

I know that global definitions in headers is poor form, but it will be a pain to fix if that is the only solution going forward. The headers are all protected from being included twice using the usual #ifndef X #define X macros, which have worked up until now.

Any thoughts on fixes, or ideas about what happened with this newer gcc version?
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