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Newsgroups: comp.os.msdos.djgpp
Subject: Re: gcc -MM output
References: <42764B12 DOT 8495F94D AT yahoo DOT com> <3dn2daF6tmbfpU1 AT news DOT dfncis DOT de> <200505021631 DOT j42GVq7P007619 AT envy DOT delorie DOT com>
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Date: Mon, 02 May 2005 18:14:50 GMT
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

DJ Delorie wrote:
> 
>> To allow the DJGPP port of GCC and DJGPP itself (libc & friends)
>> to be independent of each other.  djgpp.ver is the link between
>> the two that tells GCC what version of DJGPP is used.
> 
> I think the question is, why is -MM listing it, since -MM isn't
> supposed to list "system" headers.

Exactly.

[1] c:\c\id2id\2.0>gcc -v -MM id2id.c
Reading specs from c:/djgpp/lib/gcc-lib/djgpp/3.21/specs
Configured with: /devel/gnu/gcc/3.2/gnu/gcc-3.21/configure
i586-pc-msdosdjgpp --
prefix=/dev/env/DJDIR --disable-nls
Thread model: single
gcc version 3.2.1
 c:/djgpp/lib/gcc-lib/djgpp/3.21/cpp0.exe -lang-c -v -MM
-D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=1
-D__GXX_ABI_VERSION=102 -D__MSDOS__ -D__GO32__
-D__DJGPP__=2 -D__unix__ -D__MSDOS__ -D__GO32__ -D__DJGPP__=2
-D__unix__ -Asystem=msdos -Asystem=unix -D__NO_INLINE__
-D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386
-D__i386__ -D__tune_i586__ -D__tune_pentium__ -DMSDOS -DGO32
 -DDJGPP=2 -Dunix -remap -imacros
c:/djgpp/lib/gcc-lib/djgpp/3.21/djgpp.ver id2id.c
GNU CPP version 3.2.1 (cpplib) (80386, BSD syntax)
ignoring nonexistent directory "c:/djgpp/djgpp/include"
#include "..." search starts here:
#include <...> search starts here:
 c:/djgpp/lib/gcc-lib/djgpp/3.21/include
 c:/djgpp/include
End of search list.
id2id.o: id2id.c c:/djgpp/lib/gcc-lib/djgpp/3.21/djgpp.ver
hashlib.h

I suspect djgpp.ver is in the wrong location.  It should be in 
c:/djgpp/lib/gcc-lib/djgpp/3.21/include instead of
c:/djgpp/lib/gcc-lib/djgpp/3.21

But then how is it ever being #included at all?  -E does showup the
djgpp specific defines.  Further results:

[1] c:\c\id2id\2.0>gcc -MM empty.c
empty.o: empty.c c:/djgpp/lib/gcc-lib/djgpp/3.21/djgpp.ver


[1] c:\c\id2id\2.0>gcc -E -dM -c empty.c
#define __HAVE_BUILTIN_SETJMP__ 1
#define __unix__ 1
#define unix 1
#define __i386__ 1
#define __SIZE_TYPE__ long unsigned int
#define __GNUC_PATCHLEVEL__ 1
#define __DJGPP 2
#define __USER_LABEL_PREFIX__ _
#define __tune_pentium__ 1
#define __STDC_HOSTED__ 1
#define __MSDOS__ 1
#define DJGPP 2
#define __WCHAR_TYPE__ short unsigned int
#define __DJGPP__ 2
#define __WINT_TYPE__ int
#define __GNUC__ 3
#define __tune_i586__ 1
#define __DJGPP_MINOR__ 3
#define __GXX_ABI_VERSION 102
#define __GO32__ 1
#define i386 1
#define GO32 1
#define __GNUC_MINOR__ 2
#define DJGPP_MINOR 3
#define __STDC__ 1
#define __PTRDIFF_TYPE__ int
#define MSDOS 1
#define __DJGPP_MINOR 3
#define __REGISTER_PREFIX__
#define __NO_INLINE__ 1
#define __i386 1
#define __VERSION__ "3.2.1"

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