Failing to on linux because of wchar_t

[mingodad]

I'm trying to use interrogate/parse_file on linux to parse wxWidgets-3.2.9 and I'm getting this error:

/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:321:24: error: syntax error, unexpected wchar_t
typedef __WCHAR_TYPE__ wchar_t;
                       ^~~~~~~
Error in parsing.

I've created a file with:

typedef int wchar_t;
wchar_t a=3;

and I'm getting this:

/tmp/pp.c:1:13: error: syntax error, unexpected wchar_t
typedef int wchar_t;
            ^~~~~~~
Error in parsing.

It seems that 'wchar_t' is predefined as a keyword, gcc parses it without any error.

[rdb]

wchar_t is a built-in keyword in C++. interrogate parses C++, not C.

What this is asking is to add support for parsing C.

[rdb]

My stddef.h has this:

#ifndef __cplusplus
typedef __WCHAR_TYPE__ wchar_t;
#endif

Have you tried passing -D__cplusplus to interrogate/parse_file? This is not an automatically pre-defined symbol in interrogate.

[mingodad]

Thank you for reply !

When I try it with -D__cplusplus I'm getting this (ignore the #error message for now):

parse_file -D__cplusplus=201103 -S /usr/lib/gcc/x86_64-linux-gnu/9/include -S /usr/include -S /usr/include/linux -I include/wx-3.2 -I lib/wx/include/gtk3-unicode-3.2 include/wx-3.2/wx/wx.h ""
Predefining __cplusplus as 201103
/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2/wx/defs.h:62:19: error: "No Target! You should use wx-config program for compilation flags!"
#           error "No Target! You should use wx-config program for compilation flags!"
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/9/include/syslimits.h:7:2: warning: Ignoring unknown directive #include_next
#include_next <limits.h>
 ^~~~~~~~~~~~
/usr/include/stdlib.h:598:14: error: syntax error, unexpected identifier
     __THROW __asm ("at_quick_exit") __nonnull ((1));
             ^~~~~
Error in parsing.

[mingodad]

Now with target defined:

parse_file -D__cplusplus=201103 -S /usr/lib/gcc/x86_64-linux-gnu/9/include -S /usr/include -S /usr/include/linux -I/home/mingo/local/wxWidgets-3.2.9/lib/wx/include/gtk3-unicode-3.2 -I/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2 -D_FILE_OFFSET_BITS=64 -DWXUSINGDLL -D__WXGTK__ include/wx-3.2/wx/wx.h
Predefining __cplusplus as 201103
Predefining _FILE_OFFSET_BITS as 64
Predefining WXUSINGDLL as 
Predefining __WXGTK__ as 
/usr/lib/gcc/x86_64-linux-gnu/9/include/syslimits.h:7:2: warning: Ignoring unknown directive #include_next
#include_next <limits.h>
 ^~~~~~~~~~~~
/usr/include/stdlib.h:598:14: error: syntax error, unexpected identifier
     __THROW __asm ("at_quick_exit") __nonnull ((1));
             ^~~~~
Error in parsing.

[mingodad]

When I remove /usr/lib/gcc/x86_64-linux-gnu/9/include :

parse_file -D__cplusplus=201103 -S /usr/include -S /usr/include/linux -I/home/mingo/local/wxWidgets-3.2.9/lib/wx/include/gtk3-unicode-3.2 -I/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2 -D_FILE_OFFSET_BITS=64 -DWXUSINGDLL -D__WXGTK__ include/wx-3.2/wx/wx.h
Predefining __cplusplus as 201103
Predefining _FILE_OFFSET_BITS as 64
Predefining WXUSINGDLL as 
Predefining __WXGTK__ as 
/usr/include/wchar.h:38:10: warning: Cannot find stdarg.h
#include <stdarg.h>
         ^~~~~~~~~~
/usr/include/wchar.h:93:45: error: syntax error, unexpected identifier
			 const wchar_t *__restrict __src, size_t __n)
                                            ^~~
Error in parsing.

[rdb]

You're supposed to use -S and point it at a suitable parser-inc folder which contains standard library stubs. One is provided as part of this repo. Don't point it at your system C/C++ libraries, they are full of non-standard syntax since they are designed for gcc/clang.

[mingodad]

Interesting ! Why they are not installed when we do 'make install' ?

[mingodad]

Using -S interrogate/parser-inc:

parse_file -S /home/mingo/dev/c/A_programming-languages/interrogate/parser-inc -I/home/mingo/local/wxWidgets-3.2.9/lib/wx/include/gtk3-unicode-3.2 -I/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2 -D_FILE_OFFSET_BITS=64 -DWXUSINGDLL -D__WXGTK__ include/wx-3.2/wx/wx.h
Predefining _FILE_OFFSET_BITS as 64
Predefining WXUSINGDLL as 
Predefining __WXGTK__ as 
/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2/wx/chartype.h:52:14: warning: Cannot find wchar.h
    #include <wchar.h>
             ^~~~~~~~~
/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2/wx/wxcrtbase.h:37:10: warning: Cannot find wctype.h
#include <wctype.h>
         ^~~~~~~~~~
/home/mingo/local/wxWidgets-3.2.9/include/wx-3.2/wx/wxcrtbase.h:394:1: error: syntax error, unexpected '('
WXDLLIMPEXP_BASE wchar_t *wxCRT_StrtokW(wchar_t *psz, const wchar_t *delim, wchar_t **save_ptr);
^
with WXDLLIMPEXP_BASE expanded to: __attribute__ ((visibility("default")))

Error in parsing.