GCC, stringification, and inline GLSL?
c++, c-preprocessor, gcc, glsl, opengl
Solution
Can you use C++11? If so you could use raw string literals:
const GLchar* vert = R"END(
#version 120
attribute vec2 position;
void main()
{
gl_Position = vec4( position, 0.0, 1.0 );
}
)END";
No need for escapes or explicit newlines. These strings start with an R (or r). You need a delimiter (I chose END) between the quote and the first parenthesis to escape parenthesis which you have in the code snippet.
Problem
I'd like to declare GLSL shader strings inline using macro stringification: ``` #define STRINGIFY(A) #A const GLchar* vert = STRINGIFY( #version 120\n attribute vec2 position; void main() { gl_Position = vec4( position, 0.0, 1.0 ); } ); ``` This builds and runs fine using VS2010 but fails to compile on `gcc` with: ``` error: invalid preprocessing directive #version ``` Is there a way to use stringification like this in a portable manner? I'm trying to avoid per-line quotes: ``` const GLchar* vert = "#version 120\n" "attribute vec2 position;" "void main()" "{" " gl_Position = vec4( position, 0.0, 1.0 );" "}" ; ``` ...and/or line continuation: ``` const GLchar* vert = "\ #version 120\n \ attribute vec2 position; \ void main() \ { \ gl_Position = vec4( position, 0.0, 1.0 ); \ } \ "; ```