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Re: -fprofile-generate

From: Nathan Sidwell <nathan at codesourcery dot com>
To: Rajkishore Barik <rajbarik at in dot ibm dot com>
Cc: gcc at gcc dot gnu dot org
Date: Sat, 14 Aug 2004 18:02:13 +0100
Subject: Re: -fprofile-generate
Organization: CodeSourcery LLC
References: <OFB2A9E234.72AAE5FA-ON65256EF0.005A999E-65256EF0.005AD89D@in.ibm.com>

Rajkishore Barik wrote:

Hi, I made some changes to libgcov.c and gcov-io.h by adding a new function named "__gcov_merge_range". GCC compiles successfully without any error/warning. However, when I run any sample c program(x.c) using the following command "gcc -fprofile-generate x.c", it says undefined reference to "__gcov_merge_range" in the linking phase and it does not produce x.gcda file. I also tried compiling and linking separately using "-fprofile-generate". All the time I get this error. Can someone help? regards, Raj

You'll need to modify libgcc.mk (IIRC) to compile libgcov.c with
the correct #define enabled.  Look at how the other merge functions are
done.

nathan
--
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk

References:
- -fprofile-generate
  - From: Rajkishore Barik

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