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Incorrect compiling with 'Release' and 'Debug' Targets

Tony Stark

Hello everyone!

I've found myself in a spot of bother with Keil uVision 5.24.2.0 using ARM Compiler v5.06 update 5...although the build issues I have don't appear specific to these versions. Let me explain...

In my Keil project I have two targets: 'Release' and 'Debug'. The goal is to globally enable/disable various debug options and change formatted output simply by selecting the appropriate build target and compiling.

Here is how I tried to make it work:

- In 'Options for Target', C/C++ tab, 'Preprocessor Symbols' Define section, I have defined: 'DEBUG' for the Debug target 'noDEBUG' for the Release target all other settings are identical between the Debug and Release targets.

- I have a header file 'debug_config.h' in which I have enable/disable various debug options like so:

#ifndef __DEBUG_CONFIG_H
#define __DEBUG_CONFIG_H

#ifdef DEBUG
#define DEBUG_BUILD 1
#else
#define DEBUG_BUILD 0
#endif

#if ( DEBUG_BUILD == 1 )
#define TEST_MODE_RECOGNIZER 1
#endif

#endif

- In main.c and other source code files (which all #include "debug_config.h") I refer only to DEBUG_BUILD and TEST_MODE_* like this:

printf("IronMan Gen3.7 (%s)\r\n", (DEBUG_BUILD == 1) ? "Debug" : "Release");

#if ( TEST_MODE_RECOGNIZER == 1 )
printf("Jarvis 8.9b Test Mode\r\n");
#endif

With all that in place, if I 'Clean Targets', select 'Debug' target, then Build I will get the following output:

IronMan Gen3.7 (Debug)
Jarvis 8.9b Test Mode

Perfect!

Now I switch to 'Release' target and without doing 'Clean Targets' I do Build. I find main.c is NOT compiled! Why not? Other files which don't #include "debug_config.h" and don't mention DEBUG, DEBUG_BUILD, or TEST_MODE_RECOGNIZER are compiled. Because main.c is not recompiled I get the same output as above! What I want of course is:

IronMan Gen3.7 (Release)

I understand that I did not change main.c source code, so from compiler perspective it thinks perhaps it doesn't need to retranslate it. However, I selected different Target, which had different Defines, so I expected that it would recompile main.c like it did with other files.

I note there is a 'Undefine' section in the Target C/C++ Preprocessor Symbols, but it is grayed out. I can't select or enter anything there, otherwise I would 'Undefine DEBUG' for the Release target.

So I am stumped...

I hope this provides clear example of what I would like to do. Obviously there's something I've done wrong or misunderstood...

Thanks for any advice or suggestions on this!

Best!

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