Re: question about gcc/g++ -M option

2 msg	Inline ARM assembler and the sp register
1 msg	version 4.0.2 - error location
1 msg	gfortran- initialisation of local variables]
1 msg	config.log
4 msg	mysql.h issue
2 msg	compiling arm binaries with gcc
1 msg	Can we get source listings?
2 msg	gcc-3.4.6
6 msg	clobbering input args in inline asm
1 msg	compiling old compilers
2 msg	error: invalid option `tune=athlon-xp'
2 msg	Porting to Fedora gcc 4.0 -parsing backward sla...
1 msg	H8300-elf Toolchain based on gcc-4.1 is not wor...

question about gcc/g++ -M option
\ Lin George (27 Apr 2006)
. \ John Love-Jensen (27 Apr 2006)
. . \ Lin George (27 Apr 2006)

4 msg	About the GCC
2 msg	undefined reference error in static libraries.
1 msg	***error 2
5 msg	Problems building 4.1.0 on AIX 5.2.0
1 msg	openmp in 4.2.0
2 msg	a question about the directive .fill

Subject:	Re: question about gcc/g++ -M option
Group:	Gcc-help
From:	Lin George
Date:	27 Apr 2006

Thanks John!

The information you provided is very helpful! I am
using GNU make and I will ask further questions to GNU
make maillist. :-)

regards,
George

--- John Love-Jensen <eljay> wrote:

> Hi George,
>
> > What is the function of gcc/g++ -M option? I have
> read
> > through the man page but still can not understand.
> > Could anyone show me an example please?
>
> The -M option is used to create a dependency
> directed acyclic graph. It is
> in Makefile depedency format output of file
> prerequisites.
>
> To see how that is used in conjunction with
> Makefiles, look here:
>
>
http://www.gnu.org/software/make/manual/html_node/Automatic-Prerequisites.ht
> ml
>
> If you don't use Makefiles, for example if you are
> using Xcode projects, or
> if you use certain alternative make systems such as
> AT&T Nmake, or you
> ascertain dependencies using a truss-like mechanism,
> then you needn't bother
> with -M.
>
> HTH,
> --Eljay
>
>

__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com