All C Preprocessor Solutions on Gang of Coders

Total of 132 C Preprocessor Solutions

What is the difference between #define and const?

C++Constants C Preprocessor

Stringification - how does it work?

C++C C Preprocessor Stringification

How to make a char string from a C macro's value?

C C Preprocessor Dry

Is it possible to print a preprocessor variable in C?

C Variables C Preprocessor

Objective-C: Forward Class Declaration

Objective C C Preprocessor Forward Declaration

Type of #define variables

C C Preprocessor

Is there a preprocessor directive for detecting C++11x support?

C++Gcc C Preprocessor Preprocessor Directive

Difference between Enum and Define Statements

C++C Enums C Preprocessor

Which Cross Platform Preprocessor Defines? (WIN32 or __WIN32 or WIN32 )?

C++Macros C Preprocessor

Including a header file from another directory

C Compiler Errors Include C Preprocessor

Does gcc define anything when -g is specified?

C Debugging Gcc C Preprocessor

Why does this .c file #include itself?

C C Preprocessor

C/C++, can you #include a file into a string literal?

C++C Include C Preprocessor String Literals

Why aren't there macros in C#?

C#.Net Macros C Preprocessor

GCC dump preprocessor defines

Gcc G++C Preprocessor

Is there a preprocessor define that is defined if the compiler is MSVC?

C++Visual C++C Preprocessor

"#ifdef" inside a macro

C++C Preprocessor

#pragma pack effect

C C Preprocessor Pragma Pack

How do I check OS with a preprocessor directive?

C Operating System C Preprocessor Conditional Compilation

Why does the C preprocessor interpret the word "linux" as the constant "1"?

C Linux Gcc C Preprocessor

#define macro for debug printing in C?

C C Preprocessor

Overloading Macro on Number of Arguments

C Macros C Preprocessor

How do I see a C/C++ source file after preprocessing in Visual Studio?

C++C Debugging Visual Studio-2005 C Preprocessor

How to make a variadic macro (variable number of arguments)

C G++C Preprocessor Variadic

How to add a 'or' condition in #ifdef

C++C C Preprocessor

Why use apparently meaningless do-while and if-else statements in macros?

C++C C Preprocessor C++ Faq

"No newline at end of file" compiler warning

C++Compiler Construction Warnings C Preprocessor

FILE, LINE, and FUNCTION usage in C++

C++Debugging Logging C Preprocessor

When are C++ macros beneficial?

C++C Preprocessor

How to manually deprecate members

Ios Objective C Swift C Preprocessor Deprecated

How can I concatenate twice with the C preprocessor and expand a macro as in "arg ## _ ## MACRO"?

C Concatenation Token C Preprocessor

How do I show the value of a #define at compile-time?

Macros C Preprocessor Boost Preprocessor

Standard alternative to GCC's ##__VA_ARGS__ trick?

C C99 C Preprocessor Variadic Macros

C/C++ macro string concatenation

C++C C Preprocessor

"#include" a text file in a C program as a char[]

C Include C Preprocessor

What is the difference between #include <filename> and #include "filename"?

C++C Include Header Files C Preprocessor

What is the purpose of a single pound/hash sign (#) on its own line in the C/C++ preprocessor?

C++C Boost C Preprocessor

What exactly does an #if 0 ..... #endif block do?

Why are #ifndef and #define used in C++ header files?

C++C C Preprocessor

Including one C source file in another?

C Include C Preprocessor Code Organization Project Organization

Are typedef and #define the same in c?

C Macros C Preprocessor Typedef

Can gcc output C code after preprocessing?

C C Preprocessor Preprocessor Preprocessor Directive

Should I use #define, enum or const?

C++Enums Bit Manipulation C Preprocessor

C/C++ line number

C++C C Preprocessor Line Numbers Dynamic Compilation

#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular sections of code?

C++C If Statement Coding Style C Preprocessor

C++ preprocessor __VA_ARGS__ number of arguments

C++C C Preprocessor Variadic Macros

Is there a portable way to print a message from the C preprocessor?

Printing C Preprocessor

How to identify platform/compiler from preprocessor macros?

C++Macros Cross Platform C Preprocessor

Comma in C/C++ macro

C++C Macros C Preprocessor

What does ## (double hash) do in a preprocessor directive?

C++C Concatenation C Preprocessor

What predefined macro can I use to detect clang?

C Macros Clang C Preprocessor

Indenting #defines

C C Preprocessor Indentation Code Formatting

Macro definition to determine big endian or little endian machine?

C Architecture Macros C Preprocessor Endianness

Pragma in define macro

C Preprocessor Pragma Stringification

Macro vs Function in C

C Function C Preprocessor

How to compare strings in C conditional preprocessor-directives

C Conditional C Preprocessor

Why are preprocessor macros evil and what are the alternatives?

C++C++11 C Preprocessor

Concatenate int to string using C Preprocessor

C C Preprocessor Stringification

How to define a preprocessor symbol in Xcode

Objective C Xcode C Preprocessor

Why do most C developers use define instead of const?

C Coding Style C Preprocessor

The role of #ifdef and #ifndef

How to use Macro argument as string literal?

C++C Preprocessor String Literals

Understanding container_of macro in the Linux kernel

C Linux Kernel C Preprocessor

Multi line preprocessor macros

C++C C Preprocessor

Compile, Build or Archive problems with Xcode 4 (and dependencies)

Objective C Compiler Construction Xcode4 Clang C Preprocessor

#ifdef inside #define

C C Preprocessor

Easy way to use variables of enum types as string in C?

C Enums C Preprocessor

Why only define a macro if it's not already defined?

C Macros C Preprocessor Ifndef

Finding out what the GCC include path is

C Linux Gcc C Preprocessor

Can #if pre-processor directives be nested in C++?

C++C Preprocessor Preprocessor Directive

What are the applications of the ## preprocessor operator and gotchas to consider?

C C Preprocessor Kernighan and-Ritchie Stringification

Boolean in ifdef: is "#ifdef A && B" the same as "#if defined(A) && defined(B)"?

C++C Preprocessor Conditional Compilation

How, exactly, does the double-stringize trick work?

C C Preprocessor Stringification

Why do all the C files written by my lecturer start with a single # on the first line?

C C Preprocessor

What's the difference between the WIN32 and _WIN32 defines in C++

C++C Preprocessor

Is it possible to iterate over arguments in variadic macros?

C Foreach C99 C Preprocessor Variadic

This obfuscated C code claims to run without a main(), but what does it really do?

C C Preprocessor Obfuscation

Real-world use of X-Macros

C Macros C Preprocessor X Macros

#define vs const in Objective-C

Objective C Constants C Preprocessor

Is the C99 preprocessor Turing complete?

C Preprocessor Theory Boost Preprocessor Turing Complete

Error: invalid operands of types ‘const char [35]’ and ‘const char [2]’ to binary ‘operator+’

C++String C Preprocessor Stdstring

#define in Java

Java Preprocessor C Preprocessor

Can boolean operators be used with the preprocessor?

C++C Preprocessor

Can the C preprocessor be used to tell if a file exists?

C++Include C Preprocessor

Understanding the behavior of C's preprocessor when a macro indirectly expands itself

C Macros C Preprocessor

What are C macros useful for?

C Macros C Preprocessor Language Design Language Features

C# Macro definitions in Preprocessor

C#Macros C Preprocessor

Why use #define instead of a variable

C++C Preprocessor

Preprocessor output

Gcc Macros C Preprocessor

What is the value of an undefined constant used in #if?

C++C Preprocessor

Convert a preprocessor token to a string

C C Preprocessor Stringification

Should I use #include in headers?

C C Preprocessor File Organization

DEBUG macros in C++

C++C Debugging C Preprocessor

Why not concatenate C source files before compilation?

C Compilation C Preprocessor

How to write a while loop with the C preprocessor?

C While Loop C Preprocessor

How do I generate an error or warning in the C preprocessor?

Preprocessor check if multiple defines are not defined

C C Preprocessor

MIN and MAX in C

C Max Min C Preprocessor

Array-size macro that rejects pointers

C Arrays Macros C Preprocessor

Seeing expanded C macros

C C Preprocessor

Can we have recursive macros?

C++C Macros C Preprocessor

Combining C++ and C - how does #ifdef __cplusplus work?

C++C C Preprocessor Extern C

Why would one use #include_next in a project?

Gcc Include C Preprocessor

Define preprocessor macro through CMake?

C++Cmake C Preprocessor

What is the meaning of lines starting with a hash sign and number like '# 1 "a.c"' in the gcc preprocessor output?

C Gcc C Preprocessor

Is #define banned in industry standards?

C C Preprocessor Preprocessor Directive

How to detect LLVM and its version through #define directives?

C Clang Llvm C Preprocessor

Solution-wide #define

C#C Preprocessor

C++ preprocessor: avoid code repetition of member variable list

C++Templates Arguments C Preprocessor

How does the C preprocessor handle circular dependencies?

C Linux Gcc C Preprocessor

Why is this macro replaced as 20 instead 10?

Macros C Preprocessor

In a GNU C macro envSet(name), what does (void) "" name mean?

C Gcc Macros C Preprocessor

Can a C macro definition refer to other macros?

C C Preprocessor

Can you make custom operators in C++?

C++Templates Operators C Preprocessor Metaprogramming

MSVC doesn't expand __VA_ARGS__ correctly

Visual C++C Preprocessor Variadic Macros

Why is assert a macro and not a function?

C Assert C Preprocessor

How do I make a C++ macro behave like a function?

C++C Preprocessor

Namespaces in C

C++C Namespaces C Preprocessor

How to use #if inside #define in the C preprocessor?

C C Preprocessor

Any utility to test expand C/C++ #define macros?

C++Macros C Preprocessor

Why does the C preprocessor consider enum values as equal?

C++C Preprocessor

Is the sizeof(enum) == sizeof(int), always?

C Enums Constants C Preprocessor

Does the C preprocessor strip comments or expand macros first?

C Comments C Preprocessor C99

Is there a way to do a #define inside of another #define?

C++C Preprocessor

Difference between preprocessor directives #if and #ifdef

How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor?

C++C Cross Platform C Preprocessor Os Detection

Is there a good reason for always enclosing a define in parentheses in C?

C C Preprocessor Parentheses

Portability of #warning preprocessor directive

C++Compiler Construction Warnings C Preprocessor Portability

How to undefine a define at commandline using gcc

Gcc Macros C Preprocessor

How do I print a #defined constant in GDB?

C Gdb C Preprocessor

Why would someone use #define to define constants?

C++Constants C Preprocessor

Are empty macro definitions allowed in C? How do they behave?

C C Preprocessor