Can cppcheck pre-processor consider definitions?

[now3d]

I noticed some invalid warnings, after a #define, it then complains about an #if

ifndef MYDEF

define MYDEF 1

endif

if MYDEF /// cppcheck error here

//

endif

[Daniel Marjamäki]

Can you clarify what problem you have? Here is what happens when I try with latest release:

$ cppcheck-2.12.0 123.c 
Checking 123.c ...
Active checkers: 4/565
$ cat 123.c 

#ifndef MYDEF
#define MYDEF 1
#endif
#if MYDEF /// cppcheck error here

//
#endif

[now3d]

Hi Daniel

Sorry I should have given an example. This is just compiling using g++ some C++ code that uses pretty regular headers from the compiler and standard library

$ make cppcheck
cppcheck -q -v -I./src -I/usr/include -I/usr/include/x86_64-linux-gnu -I/usr/include/i386-linux-gnu -I/usr/include/c++/13 -I/usr/include/x86_64-linux-gnu/c++/13 -I/usr/lib/gcc/x86_64-linux-gnu/13/include --force --enable=information  src/*.cpp
cppcheck: '--enable=information' will no longer implicitly enable 'missingInclude' starting with 2.16. Please enable it explicitly if you require it.
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:54:0: information: Include file: <sys/_types.h> not found. Please note: Cppcheck does not need standard library headers to get proper results. [missingIncludeSystem]
#include <sys/_types.h>
^
/usr/lib/gcc/x86_64-linux-gnu/13/include/stddef.h:50:0: information: Include file: <machine/ansi.h> not found. Please note: Cppcheck does not need standard library headers to get proper results. [missingIncludeSystem]
#include <machine/ansi.h>
^
/usr/include/x86_64-linux-gnu/gnu/stubs.h:13:0: information: Include file: <gnu/stubs-x32.h> not found. Please note: Cppcheck does not need standard library headers to get proper results. [missingIncludeSystem]
# include <gnu/stubs-x32.h>
^
/usr/include/x86_64-linux-gnu/c++/13/bits/c++config.h:873:0: error: failed to evaluate #if condition, division/modulo by zero [preprocessorErrorDirective]
# if _GLIBCXX_USE_TBB_PAR_BACKEND
^
'' : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
F_LOCK;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
F_LOCK;__REDIRECT;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
HAVE_SCHED_H;_LIBOBJC : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
L_SET;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
MB_LEN_MAX : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
NAME_MAX;__USE_MISC;__USE_XOPEN2K8;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
PSTL_USAGE_WARNINGS;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
PSTL_USE_NONTEMPORAL_STORES;_SYS_SELECT_H : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
PTHREAD_RECURSIVE_MUTEX_INITIALIZER : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
WINNT;__BSD_NET2__;__FreeBSD__;____386BSD____;__bsdi__;__sequent__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_SOURCE;_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_RUNE_T_ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_SOURCE;_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_RUNE_T_;__FreeBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_SOURCE;_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;__BSD_VISIBLE;__FreeBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_SOURCE;_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;__FreeBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_PTRDIFF_T_;_PTRDIFF_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_RUNE_T_ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_SIZE_T_;_SIZE_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_BSD_WCHAR_T_;_WCHAR_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_GCC_PTRDIFF_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_GCC_SIZE_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_GCC_WCHAR_T_;__NetBSD__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_PTRDIFF_T_;__sequent__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_TYPE_ptrdiff_t;__need_ptrdiff_t : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_TYPE_size_t : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;_TYPE_wchar_t : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."
_ANSI_STDDEF_H;_STDDEF_H;_STDDEF_H_;__STDDEF_H__;__need_ptrdiff_t;__need_wint_t;__BEOS__ : [/usr/include/c++/13/bits/requires_hosted.h:34] #error "This header is not available in freestanding mode."