Re: target/5212: profiling support for i386-gnu specs file

[Craig Rodrigues <rodrigc at mediaone dot net>]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5212

The following was submitted by dan@debian.org.
Do not modify the subject line when CC:'ing gcc-gnats@gcc.gnu.org

==================================================================================

 On Fri, Dec 28, 2001 at 07:53:31PM +0100, Marcus Brinkmann wrote:
 > >Description:
 > 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.
 >
 > 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).

 This is inconsistent with the behavior of (the undocumented) -profile
 on Linux, IIRC; there it links in -lc_p but does not imply -pg.  Of
 course, perhaps that should just be fixed too :)  This option really
 should be added to the documentation.

 --
 Daniel Jacobowitz                           Carnegie Mellon University
 MontaVista Software                         Debian GNU/Linux Developer