Sender:	rich AT phekda DOT freeserve DOT co DOT uk
Message-ID:	<3C00F797.88E8AA45@phekda.freeserve.co.uk>
Date:	Sun, 25 Nov 2001 13:52:23 +0000
From:	Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
X-Mailer:	Mozilla 4.77 [en] (X11; U; Linux 2.2.19 i586)
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MIME-Version:	1.0
To:	djgpp-workers AT delorie DOT com
Subject:	Re: Building a profiled version of libc
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 1011119103715 DOT 8761F-100000 AT is> <3BF97E29 DOT 39FC7C7E AT phekda DOT freeserve DOT co DOT uk> <3405-Tue20Nov2001082315+0200-eliz AT is DOT elta DOT co DOT il>
Reply-To:	djgpp-workers AT delorie DOT com

Hello.

Eli Zaretskii wrote:
> 
> Richard Dawe wrote:
> > So should I add a new command to
> > src/makefile.inc that defines a new XGCC - XGCC_NO_PG - to be used for
> > mcount.c?
> 
> Yes, something like that.  Please put a comment there which explains
> what files use this special variable, and why.

Below is a diff that's tested and works for libc.

If you're building more than just libc, the build fails with profiling on
in src/libemu. I haven't looked at fixing that yet, but it looks like
emu387.dxe should not be built against a profiling version, because
profiling requires file I/O and the comments in libemu/src/emudummy.c say
file I/O is not allowed in the DXE.

OK to commit?

Bye, Rich =]

-- 
Richard Dawe
http://www.phekda.freeserve.co.uk/richdawe/

Index: src/makefile.inc
===================================================================
RCS file: /cvs/djgpp/djgpp/src/makefile.inc,v
retrieving revision 1.7
diff -p -c -3 -r1.7 makefile.inc
*** src/makefile.inc    2001/09/02 17:17:37     1.7
--- src/makefile.inc    2001/11/25 13:47:31
***************
*** 1,3 ****
--- 1,4 ----
+ # Copyright (C) 2001 DJ Delorie, see COPYING.DJ for details
  # Copyright (C) 2000 DJ Delorie, see COPYING.DJ for details
  # Copyright (C) 1998 DJ Delorie, see COPYING.DJ for details
  # -*- makefile -*-
*************** else
*** 63,68 ****
--- 64,77 ----
  XGCC = $(CROSS_GCC) $(GCC_OPT) -I. -I- -isystem $(TOP)/../../include
$(CFLAGS)
  XLGCC = $(CROSS_GCC) $(GCCL_OPT) -I. -I- -isystem $(TOP)/../../include
$(CFLAGS)
  endif
+ 
+ # Find the necessary gcc options for building the profiling
+ # support code (src/libc/crt0/mcount.c). We strip out profiling options
+ # from the standard gcc options file, to avoid a chicken-and-egg problem
+ # in a profiling version of libc (the profiling support code calling
+ # profiling support code).
+ #
+ XNOPGGCC = $(CROSS_GCC) $(shell sed -f $(TOP)/../noprof.sed
$(TOP)/../gcc.opt) -I. -I- -isystem $(TOP)/../../include $(CFLAGS)
  
  MISC = $(TOP)/../misc.exe
  
Index: src/noprof.sed
===================================================================
RCS file: noprof.sed
diff -N noprof.sed
*** /dev/null   Tue May  5 16:32:27 1998
--- noprof.sed  Sun Nov 25 08:47:31 2001
***************
*** 0 ****
--- 1,12 ----
+ # For building the profiling support code (src/libc/crt0/mcount.c),
+ # strip out profiling options, to avoid a chicken-and-egg problem
+ # in a profiling version of libc (the profiling support code calling
+ # profiling support code).
+ #
+ s:^-a$::
+ s:^-ax$::
+ s:^-finstrument-functions$::
+ s:^-fprofile-arcs$::
+ s:^-ftest-coverage$::
+ s:^-p$::
+ s:^-pg$::
Index: src/libc/crt0/makefile
===================================================================
RCS file: /cvs/djgpp/djgpp/src/libc/crt0/makefile,v
retrieving revision 1.4
diff -p -c -3 -r1.4 makefile
*** src/libc/crt0/makefile      2001/06/21 05:56:14     1.4
--- src/libc/crt0/makefile      2001/11/25 13:47:31
*************** $(LIB)/gcrt0.o : gcrt0.S crt0.S exit16.a
*** 34,36 ****
--- 34,39 ----
        $(MISC) cp gcrt0.o $@
        $(MISC) rm gcrt0.o
        sed 's AT gcrt0 DOT o@$(LIB)/gcrt0.o@' gcrt0.d > gcrt02.d
+ 
+ mcount.o : mcount.c
+       $(XNOPGGCC) -c $<

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