profiling support for i386-gnu specs file

[Marcus Brinkmann]

Hi,

I fixed the Hurd specs file to support profiling (which was broken for
statically linked programs).  The specs file I successfully used is
attached, an analysis of what it does (or should do) is in the table below.
The only relevant part of the specs file (the only parts which I changed)
are "cc1" and "startfile".

The Hurd has the i386-gnu architecture.

Thanks,
Marcus

To profile the program only:
$ gcc -o main main.c -pg 
$ ./main
$ gprof main gmon.out

To profile the program and the C library:
$ gcc -o main main.c -profile
$ ./main
$ gprof main gmon.out

The specs file implement the following option combinations:
Notes: -shared overrides (and prevents) profiling options at the linking stage
       -profile forces to link the profiling C library statically
       -pg/-p does link to the normal C library (dynamically or statically)

The cc1 option -p is added for all of -p/-pg/-profile (for the first
two automatically, for the third there is a rule in the specs file).

static	shared	pg	p	profile	=>lib
Y/N	N	Y/N	Y/N	N	-lc
N	Y	Y/N	Y/N	Y/N	-lc

Y/N	N	Y/N	Y/N	Y	-lc_p

static	shared	pg	p	profile	=>startfile
N	N	N	N	N	crt1.o crti.o crtbegin.o
Y	N	N	N	N	crt0.o crti.o crtbegin.o
N	Y	Y/N	Y/N	Y/N	crti.o crtbeginS.o

N	N	Y/N	Y/N	Y	gcrt0.o crti.o crtbegin.o
Y	N	Y/N	Y/N	Y/N	gcrt0.o crti.o crtbegin.o
                ^^^^^^^^^^^^^^^^^^^ at least one Y

N	N	Y/N	Y/N	N	gcrt1.o crti.o crtbegin.o
                ^^^^^^^^^^^ at least one Y

-- 
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de