hubert.reinterpretcast added inline comments.
================ Comment at: clang/docs/ReleaseNotes.rst:87 +- -fno-common has been enabled as the default for all targets. ---------------- jyknight wrote: > Might be nice to expand upon this somewhat, to give users a clue what it > means to them. > > E.g. > > Therefore, C code which uses multiple definitions of a global variable will > trigger a multiple-definition linker errors. Generally this occurs when a > variable in a header file neglects to use the "extern" keyword on the > declaration. The previous behavior can be restored by specifying -fcommon. Suggestion: Therefore, C code that uses tentative definitions as definitions of a variable in multiple translation units will trigger multiple-definition linker errors. Generally, this occurs when the use of the `extern` keyword is neglected in the declaration of a variable in a header file. In some cases, no specific translation unit provides a definition of the variable. The previous behavior can be restored by specifying `-fcommon`. CHANGES SINCE LAST ACTION https://reviews.llvm.org/D75056/new/ https://reviews.llvm.org/D75056 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
