libtool adds multiple `-lg' options linking [v3] testsuite

[John David Anglin]

Forwarded message:
>From dave Thu Apr 26 13:01:45 EDT 2001
Subject: libtool adds multiple `-lg' options linking [v3] testsuite
To: address@hidden
Date: Thu, 26 Apr 2001 13:01:45 -0400 (EDT)
From: "John David Anglin" <address@hidden>
X-Mailer: ELM [version 2.4 PL25]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Content-Length: 2399      

The following error occurs in the mkchecklog.txt:

/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/../../gcc/g++ -B/xxx/gnu/
gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/../../gcc/ -ggdb3 -DDEBUG_ASSERT 
-nostdinc++ -I/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/include 
-I/xxx/gnu/gcc-3.0/libstdc++-v3/include/std 
-I/xxx/gnu/gcc-3.0/libstdc++-v3/include/c_std 
-I/xxx/gnu/gcc-3.0/libstdc++-v3/include 
-I/xxx/gnu/gcc-3.0/libstdc++-v3/libsupc++ -I/xxx/gnu/gcc-3.0/libstdc++-v3/libio 
-I/xxx/gnu/gcc-3.0/libstdc++-v3/testsuite -nodefaultlibs 
/xxx/gnu/gcc-3.0/libstdc++-v3/testsuite/25_algorithms/lower_bound.cc -o 
./lower_bound.st-exe  
/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/src/../libsupc++/.libs/libsupc++.a
 -L/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/src 
-L/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/src/.libs -lm 
-L/xxx/gnu/gcc-3.0/objdir/gcc -L/usr/local/vax-dec-ultrix4.3/bin 
-L/usr/local/vax-dec-ultrix4.3/lib 
-L/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/3.0 
-L/usr/local/lib/gcc-lib/vax-dec-ultrix4.3/3.0/../../../../vax-dec-ultrix4.3/lib
 -L/usr/local/lib/gcc-lib!
/vax-dec-ultrix4.3/3.0/../../.. -lgcc -lg -lc -lgcc 
/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/src/.libs/libstdc++.a 
-lm -lm -lm -lgcc -lg -lc -lgcc -lm -lgcc -lg -lc -lgcc -lc -lgcc -lc 
-Wl,--rpath -Wl,/xxx/gnu/gcc-3.0/objdir/vax-dec-ultrix4.3/libstdc++-v3/../../gcc
/lib/libg.a(.text+0x0): multiple definition of `_dbsubc'
/lib/libg.a(.text+0x0): first defined here
/lib/libg.a(.text+0xb): multiple definition of `_dbsubn'
/lib/libg.a(.text+0xb): first defined here
/lib/libg.a(.text+0x0): multiple definition of `_dbsubc'
/lib/libg.a(.text+0x0): first defined here
/lib/libg.a(.text+0xb): multiple definition of `_dbsubn'
/lib/libg.a(.text+0xb): first defined here
collect2: ld returned 1 exit status

As it happens, libg.a is not an archive but an object disguised as a library.
Thus, -lg can't be included multiple times in the link command.  I see
`postdeps="-lgcc -lg -lc -lgcc"' in libtool, so I suspect that libtool was used
to build the above command.

The library libg.a is only linked in when `-g' is used.  Could libtool
be modified to only add -lg when -g is specified, and only do it once?

Dave
-- 
J. David Anglin                                  address@hidden
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)


-- 
J. David Anglin                                  address@hidden
National Research Council of Canada              (613) 990-0752 (FAX: 952-6605)