[Bug gcov-profile/38784] New: gcc 4.4.0 20090109 - Naming xgcc.* gcc.* when configure with "--enable-coverage=noopt"

["rob1weld at aol dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I'm building gcc 4.4.0 20090109 on i386-pc-solaris2.11 (OpenSolaris 2008.11).

I configured using "--enable-coverage=noopt" (and complained here that it
breaks
the build http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38776 ) and made by
simply typing "gmake".


First there is a stage with "-fprofile-arcs -ftest-coverage
-frandom-seed=c-lang.o -O0"
than another with "-O2 -fprofile-generate", then libgcc is built without
either coverage or profiling ... hmmm ...



I wanted to tryout how the coverage testing was working so in the root of 
the build directory I typed:


# gcov -b gcc/xgcc
xgcc.gcno:cannot open graph file

# gprof gcc/xgcc
gmon.out: No such file or directory


# slocate gmon.out
(prints nothing)

# slocate gcc.gcno
/usr/share/src/gcc_build/gcc/gcc.gcno


# cd gcc
# cp gcc.gcno xgcc.gcno
# gcov -b xgcc
xgcc.gcno:version `404e', prefer `304c'
xgcc.gcda:cannot open data file

# cp gcc.gcda xgcc.gcda
# gcov -b xgcc
xgcc.gcno:version `404e', prefer `304c'
xgcc.gcda:version `404e', prefer version `304c'
xgcc.gcda:corrupted



1. Why does gcov complain "version `404e', prefer `304c'" ? 
Is it saying it wants an _older_ version of gcov ?


2. Should the text be 'more similar' (almost the same) for both these error
messages?:

xgcc.gcno:version `404e', prefer `304c'
xgcc.gcda:version `404e', prefer version `304c'


3. Should gcov 'know' about xgcc ?
Do we need a "-DIN_GCC" (type of mechanism) for gcov to tell it to look
for xgcc.* whenever it is told to look for gcc.* files (or just look for
both and test the checksum to see which is correct)?

Thanks,
Rob


PS: Note the "xgcc.gcda:corrupted" is probably because the tail was
corrupted (not copied) and is not a "Bug" that is part of this Report.


-- 
           Summary: gcc 4.4.0 20090109 - Naming xgcc.* gcc.* when configure
                    with "--enable-coverage=noopt"
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rob1weld at aol dot com
 GCC build triplet: i386-pc-solaris2.11
  GCC host triplet: i386-pc-solaris2.11
GCC target triplet: i386-pc-solaris2.11


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38784