[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

File extensions to use pre-processing C source?

From: Daniel Goldman
Subject: File extensions to use pre-processing C source?
Date: Wed, 23 Apr 2014 00:35:40 -0700
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0

I compile a lot of C source code. Adding m4 step will greatly simplify other steps (user manuals, help files, web pages) that share various macros in the source code, let me avoid using cpp on general text files. My question relates to file extensions to use for pre-processing the C source code. It seems there are three options:

*** Option #1: .c = backed-up source; .m4t = temporary file

       m4          gcc
bin2.c -> bin2.m4t --> bin2.o

       m4          gcc
win2.c -> win2.m4t --> win2.o

*** Option #2: .m4 = backed-up source, .c = temporary file

        m4        gcc
bin2.m4 -> bin2.c --> bin2.o

        m4        gcc
win2.m4 -> win2.c --> win2.o

*** Option #3: ???

Better way I have not thought of. :)

///// Pros of Option #2 seem:

A) more "logical" m4 works on .m4 files, gcc works on .c files.

B) can use builtin make rules for compiling .c files, do not need to write any new rules, like rule to go straight from .m4t to exefile.

//// Cons of Option #2 seem:

A) the source files ARE C files (many macros expanded, but no macro definitions), so seems weird to me using .m4 extension.

B) would likely look weird (odd) to someone else looking at C source code with .m4 extension.

C) adding backups for new .m4 extension and excluding backup for .c temporary files complicates backup situation a little.


I have a file with many m4 macros called "macros.m4" (and macro.m4f frozen version) that is used in the m4 steps above.

I mostly know how to write makefiles, create library, compile, etc. so that's not the problem. Its a file extension question, wondering if anyone has an opinion which way makes more sense, or has already "solved" this minor but important question. I don't want to take the wrong path. :( Primarily because of Con B), I'm leaning toward Option #1 ".c -> .m4t -> .o". Any opinions appreciated.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]