xgcc build: -Dinhibit_libc appears not to work

[Sean Callanan <sc843@bard.edu>]

Dear mailing list,

I have been having issues compiling gcc as a cross-compiler.
Specifically, my problems center around -Dinhibit_libc. 

I am trying to compile gcc 3.1 (from Mar 17 CVS) using gcc-2.95.2 under
SuSE Linux 7.0/sparc on a Sun Ultra 5 with an UltraSparc IIi processor.
The build and host platform is sparc[32]-linux, the target platform is
sparc64-linux (I'm basically trying to build a full sparc64 userland and
distro).

I have the March 14th CVS of binutils, and the March 17th CVS of gcc. My
environment is set up as follows:

BUILD="sparc-linux"
HOST="sparc-linux"
PREFIX="/usr/local"
TARGET="sparc64-linux"

I am following instructions from the CrossGCC HOWTO, and have separate
build directories for each of the packages. I am not using the
"one-tree" build method.

First, I configured binutils:

> ../binutils/configure --build=$BUILD --host=$HOST --target=$TARGET --prefix=$PREFIX -v

Then, I built it (make; make install) successfully. I now have sparc64-*
in /usr/local/bin.

Then, I configured gcc:

> ../gcc/configure --build=$BUILD --host=$HOST --target=$TARGET --prefix=$PREFIX -v

Subsequently, I issued the command

> make cross LANGUAGES=c

(this has also been tried with "make cross", "make LANGUAGES=c", "make"
and "make all", since that's every build method I could find on the
Internet. Error messages do not vary between these methods.)

The build fails with the messages below. How can I build GCC without
requiring libc for my target platform? This must be possible or else
we'd have a chicken-and-egg problem. In addition, why is the
-Dinhibit_libc in the xgcc command not preventing these errors from
happening?

Sincerely,

Sean Callanan

... lots more messages ...
make GCC_FOR_TARGET="/usr/local/src/build-gcc/gcc/xgcc 
-B/usr/local/src/build-gcc/gcc/ -B/usr/local/sparc64-linux/bin/ 
-B/usr/local/sparc64-linux/lib/ -isystem
/usr/local/sparc64-linux/include" \
   HOST_PREFIX="" HOST_PREFIX_1="loser-" \
   AR_FOR_TARGET="sparc64-linux-ar" \
   AR_CREATE_FOR_TARGET="sparc64-linux-ar  rc" \
   AR_FLAGS_FOR_TARGET="" \
   OLDCC="cc" CCLIBFLAGS="-O" \
   CFLAGS="-g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -Wtraditional -pedantic -Wno-long-long" \
   RANLIB_FOR_TARGET="sparc64-linux-ranlib" \
   RANLIB_TEST_FOR_TARGET="[ -f sparc64-linux-ranlib ] || ( [ 
"sparc-unknown-linux-gnu" = "sparc64-unknown-linux-gnu" ] && [ -f 
/usr/bin/ranlib -o -f /bin/ranlib ] )" \
   NM_FOR_TARGET="sparc64-linux-nm" AWK="gawk" \
   LIBGCC2_CFLAGS="-O2  -DCROSS_COMPILE -DIN_GCC    -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem
./include 
-fPIC -g1  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc" \
   INCLUDES="-I. -I. -I../../gcc/gcc -I../../gcc/gcc/. 
-I../../gcc/gcc/config -I../../gcc/gcc/../include" MAYBE_USE_COLLECT2=""
\
   CONFIG_H="config.h auto-host.h 
gansidecl.h ../../gcc/gcc/config/sparc/linux64.h defaults.h
insn-codes.h" 
MACHMODE_H="machmode.h machmode.def" \
   LIB1ASMSRC='' \
   MAKEOVERRIDES= \
   -f libgcc.mk all
make[2]: Entering directory `/usr/local/src/build-gcc/gcc'
for d in libgcc; do \
   if [ -d $d ]; then true; else mkdir $d; fi \
done
if [ -f stmp-dirs ]; then true; else touch stmp-dirs; fi
make GCC_FOR_TARGET="/usr/local/src/build-gcc/gcc/xgcc 
-B/usr/local/src/build-gcc/gcc/ -B/usr/local/sparc64-linux/bin/ 
-B/usr/local/sparc64-linux/lib/ -isystem
/usr/local/sparc64-linux/include" \
   AR_FOR_TARGET="sparc64-linux-ar" \
   AR_CREATE_FOR_TARGET="sparc64-linux-ar  rc" \
   AR_EXTRACT_FOR_TARGET="" \
   AR_FLAGS_FOR_TARGET="" \
   CC="gcc" CFLAGS="-g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -Wtraditional -pedantic -Wno-long-long" \
   HOST_PREFIX="" \
   HOST_PREFIX_1="loser-" \
   LANGUAGES="c c++" \
   LIBGCC2_CFLAGS="-O2  -DCROSS_COMPILE -DIN_GCC    -W -Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem
./include 
-fPIC -g1  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc "  \
   MULTILIB_CFLAGS="" T= crtbegin.o
make[3]: Entering directory `/usr/local/src/build-gcc/gcc'
make[3]: `crtbegin.o' is up to date.
make[3]: Leaving directory `/usr/local/src/build-gcc/gcc'
/usr/local/src/build-gcc/gcc/xgcc -B/usr/local/src/build-gcc/gcc/ 
-B/usr/local/sparc64-linux/bin/ -B/usr/local/sparc64-linux/lib/ -isystem 
/usr/local/sparc64-linux/include -O2  -DCROSS_COMPILE -DIN_GCC    -W
-Wall 
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem
./include 
-fPIC -g1  -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -shared 
-nodefaultlibs -Wl,--soname=libgcc_s.so.0
-Wl,--version-script=libgcc.map 
-o libgcc_s.so   libgcc/./_muldi3.o libgcc/./_divdi3.o
libgcc/./_moddi3.o 
libgcc/./_udivdi3.o libgcc/./_umoddi3.o libgcc/./_negdi2.o 
libgcc/./_lshrdi3.o libgcc/./_ashldi3.o libgcc/./_ashrdi3.o 
libgcc/./_ffsdi2.o libgcc/./_clz.o libgcc/./_udiv_w_sdiv.o 
libgcc/./_udivmoddi4.o libgcc/./_cmpdi2.o libgcc/./_ucmpdi2.o 
libgcc/./_floatdidf.o libgcc/./_floatdisf.o libgcc/./_fixunsdfsi.o 
libgcc/./_fixunssfsi.o libgcc/./_fixunsdfdi.o libgcc/./_fixdfdi.o 
libgcc/./_fixunssfdi.o libgcc/./_fixsfdi.o libgcc/./_fixxfdi.o 
libgcc/./_fixunsxfdi.o libgcc/./_floatdixf.o libgcc/./_fixunsxfsi.o 
libgcc/./_fixtfdi.o libgcc/./_fixunstfdi.o libgcc/./_floatditf.o 
libgcc/./__gcc_bcmp.o libgcc/./_varargs.o libgcc/./__dummy.o 
libgcc/./_eprintf.o libgcc/./_bb.o libgcc/./_clear_cache.o 
libgcc/./_trampoline.o libgcc/./__main.o libgcc/./_exit.o 
libgcc/./_absvsi2.o libgcc/./_absvdi2.o libgcc/./_addvsi3.o 
libgcc/./_addvdi3.o libgcc/./_subvsi3.o libgcc/./_subvdi3.o 
libgcc/./_mulvsi3.o libgcc/./_mulvdi3.o libgcc/./_negvsi2.o 
libgcc/./_negvdi2.o libgcc/./_ctors.o libgcc/./_eh.o 
libgcc/./frame-dwarf2.o -lc && rm -f libgcc_s.so.0 && ln -s libgcc_s.so 
libgcc_s.so.0
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: skipping incompatible /lib/libc.so.6
when 
searching for /lib/libc.so.6
/usr/local/sparc64-linux/bin/ld: cannot find /lib/libc.so.6
collect2: ld returned 1 exit status
make[2]: *** [libgcc_s.so] Error 1
make[2]: Leaving directory `/usr/local/src/build-gcc/gcc'
make[1]: *** [stmp-multilib] Error 2
make[1]: Leaving directory `/usr/local/src/build-gcc/gcc'
make: *** [cross] Error 2