TLDR Tech / Dev
Why Git Has a Variable Named false_but_the_compiler_does_not_know_it_
Git uses a specialized C programming trick involving a global variable named `false_but_the_compiler_does_not_know_it_` to manage specific compiler warnings. By defining this variable in a separate compilation unit without a constant qualifier, developers prevent compilers from incorrectly flagging valid code as unreachable. While the trick suppresses false-positive warnings during initial compilation, link-time optimization can still identify the constant value and remove redundant branches from the final binary.
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