[jed-users] OT: Need an expanded compilation listing

[Roland Hughes <roland@xxxxxxxxxxxxxxxxxxxx>]

All,

This is completely off-topic, but the chat group has gone completely 
silent after I asked my question, but, a JED user just might have a full 
build environment already setup and can generate what I need.

I'm in the process of porting logger.c to OpenVMS. The available C 
compiler only goes up to the C99 standard (and possibly not all of it). 
Most of the source files came from here 
<https://github.com/karelzak/util-linux> if that makes a difference. 
Some headers had to be pulled from gcc itself 
<https://github.com/gcc-mirror/gcc>.

Naturally there is a lot of bad code and someone decided to prove just 
how creative they could be with macros. Never good. Currently list.h has 
a set of #defines I haven't been able to unwind to the compiler's 
satisfaction.

/**
 * list_entry - get the struct for this entry
 * @ptr:    the &struct list_head pointer.
 * @type:   the type of the struct this is embedded in.
 * @member: the name of the list_struct within the struct.
 */
#define list_entry(ptr, type, member) __extension__ ({              \
    const typeof( ((type *)0)->member ) *__mptr = (ptr);   \
    (type *)( (char *)__mptr - offsetof(type,member) );})


#define list_first_entry(head, type, member) \
    ((head) && (head)->next != (head) ? list_entry((head)->next, type, member) : NULL)

#define list_last_entry(head, type, member) \
    ((head) && (head)->prev != (head) ? list_entry((head)->prev, type, member) : NULL)

The list_entry macro gets used in logger.c too. I managed to get rid of 
all the other macros which used __extension__ and returned a value 
inside of (). Not cool btw.

What I need, if someone already has a build environment setup and a 
logger.c which is close enough is a compilation listing for logger. 
According to this link 
<https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html>the gcc 
switches should be -dD -dI

That "should" get all macro expansions and the include files in the 
output. Then I can mechanically replace things and continue onward.

Sorry for the off-topic post, but the developer chat room for the link 
had people scattering when I asked the question.

Roland


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