Creating C macro with ## and __LINE__ (token concatenation with positioning macro)

Question

I want to create a C macro that creates a function with a name based on the line number. I thought I could do something like (the real function would have statements within

Answer 1

GCC doesn't require "wrapping" (or realizing) unless the result needs to be "stringified". Gcc has features but ALL can be done with plain C version 1 (and some argue Berkeley 4.3 C is so much faster it's worth learning how to use).

**Clang (llvm) DOES NOT DO WHITE SPACE CORRECTLY for macro expansion - it adds whitespace (which certainly destroy's the result as being a C Identifier for further pre-processing) **, clang simply doesn't do # or * macro expansion as a C Preprocessor is expected to for decades. The prime example is compiling X11, macro "Concat3" is broken, it's result is now MISNAMED C Identifier, which of course fails to build. and i'm beginning to thing build fails are their profession.

I think the answer here is "new C that breaks standards is bad C", these hacks always choose to (clobber namespaces) they change defaults for no reason but do not really "improve C" (excepting to their own say so: which i say is contraption made to explain why they get away with all the breakage no one yet has made them responsible for).

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It's not a problem that the earlier C pre-processors did not support UNIq_()__ because they supported #pragma which allows "compiler brand hackery in code to be flagged as hackery" and also function just as well WITHOUT effecting standards: just as changing defaults is useless wonton breakage, and just as changing what a function does while using the same name (namespace clobbering) is ... malware in my opinion