That's C, baby. C!
This clarifies a common misunderstanding among C programmers, including seasoned practitioners, but is incremental as it reinforces existing knowledge about C's undefined semantics.
The paper addresses the misconception that C code has inherent meaning by demonstrating that C semantics are not fully defined due to factors like undefined behavior and build details, concluding that no meaning can be assigned to C code without full knowledge of the toolchain and build procedure.
Hardly a week goes by at BUGSENG without having to explain to someone that almost any piece of C text, considered in isolation, means absolutely nothing. The belief that C text has meaning in itself is so common, also among seasoned C practitioners, that I thought writing a short paper on the subject was a good time investment. The problem is due to the fact that the semantics of the C programming language is not fully defined: non-definite behavior, predefined macros, different library implementations, peculiarities of the translation process, . . . : all these contribute to the fact that no meaning can be assigned to source code unless full details about the build are available. The paper starts with an exercise that admits a solution. The existence of this solution will hopefully convince anyone that, in general, unless the toolchain and the build procedure are fully known, no meaning can be assigned to any nontrivial piece of C code.