How do I define a preprocessor variable through CMake? The equivalent code would be #define foo. 6 Answers 6
I’m working on a project that has a lot of legacy C code. We’ve started writing in C++, with the intent to eventually convert the legacy code, as well....
Where are MIN and MAX defined in C, if at all? What is the best way to implement these, as generically and type safely as possible? (Compiler extensions/builtins for...
I’m going through some C course notes, and every C program source file begins with a single # on the first line of the program. Then there are blank...
I have been seeing code like this usually in the start of header files: #ifndef HEADERFILE_H #define HEADERFILE_H And at the end of the file is #endif What is...
In many C/C++ macros I’m seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples. #define FOO(X) do { f(X);...
Why does the C preprocessor in GCC interpret the word linux (small letters) as the constant 1? test.c: #include <stdio.h> int main(void) { int linux = 5; return 0;...
In the C and C++ programming languages, what is the difference between using angle brackets and using quotes in an include statement, as follows? #include <filename> #include "filename" 3...