i486-linux-glibc1 Bootstrap failure in 3.0

[David Ronis]

Thanks for the reply.  

I think I'm just going to wait until 3.0.1 or .2 comes out--this is a
noncritical box, and compile times are very very long.  

David 

BTW, there are clearly several optimization issues that must be dealt
with for x86's.  The testsuites have always generated additional
failures when lots of optimization is turned on.

Manfred Hollstein writes:
 > 
 > David Ronis wrote:
 > > 
 > > A bootstrap build on an i486-linux(2.2.17)-glibc1(5.4.46) fails in
 > > libgcc.  I configured as:
 > > 
 > > ./configure --with-gnu-as --with-gnu-ld --prefix=/usr --enable-shared
 > >             --disable-nls --disable-libgcj --enable-languages=c++,f77
 > > 
 > > and had CFLAGS (in the environment before configure) set to:
 > > 
 > > -O3 -march=i486 -ffast-math -funroll-loops -fomit-frame-pointer
 > >     -fforce-mem -fforce-addr
 > 
 > I believe I had a similar failure when bootstraping with
 > -fomit-frame-pointer; IIRC, adding -mno-push-args to BOOT_CFLAGS
 > made (this) problem go away. For details see
 > < http://gcc.gnu.org/ml/gcc-bugs/2001-06/msg01305.html >
 > 
 > Cheers.
 > 
 > l8er
 > manfred
 > 
 > 
 > > 
 > > Here are some relevant version numbers:
 > > 
 > >                 Gnu C                  2.95.3
 > >                 Binutils               2.11.2
 > >                 Linux C Library        5.4.46
 > >                 Dynamic Linker (ld.so) 1.9.9
 > >                 Linux C++ Library      27.2.8
 > > 
 > > Here's the last part of the log:
 > > 
 > > ./xgcc -B./ -B/usr/i486-pc-linux-gnulibc1/bin/ -isystem
 > >        /usr/i486-pc-linux-gnulibc1/include -O2 -DIN_GCC -DUSE_GNULIBC_1 -W
 > >        -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
 > >        -isystem ./include -fPIC -g1 -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED
 > >        -I. -I. -I. -I./. -I./config -I./../include -fexceptions -c
 > >        ./unwind-dw2.c -o libgcc/./unwind-dw2.o
 > > 
 > > unwind-dw2.c: In function `extract_cie_info':
 > > unwind-dw2.c:219: warning: implicit declaration of function `strlen'
 > > unwind-dw2.c: In function `execute_stack_op':
 > > unwind-dw2.c:300: warning: `result' might be used uninitialized in this function
 > > unwind-dw2.c: In function `uw_frame_state_for':
 > > unwind-dw2.c:886: warning: implicit declaration of function `memset'
 > > unwind-dw2.c:897: structure has no member named `uc_mcontext'
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: dereferencing pointer to incomplete type
 > > unwind-dw2.c:897: warning: `new_cfa_' might be used uninitialized in this function
 > > unwind-dw2.c: In function `uw_install_context_1':
 > > unwind-dw2.c:1103: warning: implicit declaration of function `memcpy'
 > > make[3]: *** [libgcc/./unwind-dw2.o] Error 1
 > > make[3]: Leaving directory `/misc/montroll/home/ronis/gcc-3.0/gcc'
 > > make[2]: *** [libgcc.a] Error 2
 > > make[2]: Leaving directory `/misc/montroll/home/ronis/gcc-3.0/gcc'
 > > make[1]: *** [stage1_build] Error 2
 > > make[1]: Leaving directory `/misc/montroll/home/ronis/gcc-3.0/gcc'
 > > 
 > > Note that the warnings about memcpy and strlen are strange, the latter
 > > is defined in the installed string.h.
 > > 
 > > David