How to #define variable in C -


i have file called config.h following...

#define gl_doom

then have following in file m_misc.c...

#include "config.h" ... #if ((defined gl_doom) && (defined _msc_ver)) logd("using glboom-plus.cfg"); #define boom_cfg "glboom-plus.cfg" #else logd("using prboom-plus.cfg"); #define boom_cfg "prboom-plus.cfg" #endif

but says...

05-02 14:40:24.789: d/doom(2966): using prboom-plus.cfg

what deal here? new c missing?

let's take following code:

#define gl_doom #define _msc_ver  #if ((defined gl_doom) && (defined _msc_ver)) logd("using glboom-plus.cfg"); #else logd("using prboom-plus.cfg"); #endif

i can compile code g++ -e output result of preprocessor. let's @ output.

# 1 "blah.c" # 1 "<built-in>" # 1 "<command-line>" # 1 "blah.c"  logd("using glboom-plus.cfg");

so, me, implies don't have both gl_doom , _msc_ver defined.

you might verify test looks like:

#include "config.h"  #ifndef gl_doom #error gl_doom not defined #endif  #ifndef _msc_ver #error _msc_ver not defined #endif

it's worth noting something. _msc_ver preprocessor symbol defined strictly microsoft visual studio. if you're not compiling software, expectation would not defined.


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