All Questions
Tagged with compiler-flags c-preprocessor
9 questions
-1
votes
1
answer
108
views
Instantiate different classes according to different compilation flag of same header file in c++
I have a class that varies according to a compilation flag.
I would like to instantiate both the versions of the class in the same scope.
my_class.h
#ifndef MY_CLASS_H
#define MY_CLASS_H
#ifdef ...
2
votes
1
answer
525
views
Overriding line marker filename in CPP output
At work, we're using GNU CPP as a preprocessor for a custom language. The flow downstream from the preprocessor understands line markers (of the form # 123 foo-bar.extension) and embeds their ...
0
votes
1
answer
295
views
#define real function name to __noop in Visual C++ 2013
I can do this in Visual C++ 2008 with Release (NDEBUG) setting:
debug.h
#ifdef _DEBUG
void debug_printf(const char* format, ...);
#else
#define debug_printf(format, v) __noop
#endif
debug....
- 9,104
0
votes
1
answer
591
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There is the right place to add -U__STRICT_ANSI__ to XCode build settings?
I try to add -U__STRICT_ANSI__ to my project build settings in XCode. But if I add it as "preprocessor macros" the commandline result is -DU__STRICT_ANSI__.
XCode adds automatically "D".
If I add it ...
- 554
0
votes
1
answer
184
views
What do the include paths/numbers in preprocessed output of icpc (or gcc I guess) mean?
If I use the -E flag when compiling, I get the pre-processed output.
Some of the lines in this output is :-
# 4 "../Framework.h" 2
# 1 "../Basic.h" 1
# 1 "/usr/include/c++/4.1.2/queue" 1 3
What ...
- 3,508
4
votes
1
answer
1k
views
MSVS C++, how to compile already-preprocessed file with *.i extension?
Related question here: How can I run the MSVC preprocessor and compiler in two separate steps?
I explicitly pre-process a MyFile.cpp (not compile) to a MyFile.i. I want to later "compile" that file ...
- 5,949
1
vote
1
answer
1k
views
What to use for iOS compiler define
I have the following code that I want to run on Iphone OS, what compiler flag should I use for IOS and where in the below code should it be inserted? Thanks
#if defined(__BORLANDC__) || defined (...
- 1,375
6
votes
4
answers
8k
views
C++ adding Debugging code that only runs when Debugging
As the question explains: I would like to add some debugging code that only runs when the program is attached to the debugger. I would imagine that this flag or pre-processor variable would be ...
- 4,265
0
votes
5
answers
3k
views
What preprocessor directive or other method should I use to discern 32- vs 64-bit environment?
I would like to compile the following C program for 32- and 64-bit systems.
#include <stdio.h> ...
- 96.8k