[Bug c/23687] New: Crosscompiler looks for files it never built

["imipak at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>]

I can compile the initial version of GCC 4.1.0 on a Pentium 4 with a target of 
an SB1 MIPS64 bigendian processor, as required to bootstrap the toolchain 
compilation. On attempting to use this cross-compiler, it reports that it 
cannot find crti.o. (This was tested in a number of ways, including compiling 
glibc as that is the next stage in building the cross compiler toolchain.) 
 
The source for crti is in the config directory for the MIPS processor but is 
not being accessed.I can compile this manually and copying the resultant file 
into the proper place. 
 
Using the cross-compiler now, I then get the error that the cross-compiler 
cannot find crt1.o. There is no sourcecode for crt1 in the MIPS directory. The 
only other crt file in that directory is for crtn - this file will not compile 
at all. 
 
The main compiler I am using for building the cross-compiler is GCC 3.4.3 and 
was built using the following options: 
 
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --with-system-zlib --enable-__cxa_atexit 
--disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux 
Thread model: posix 
gcc version 3.4.3 20050227 (Red Hat 3.4.3-22.1) 
 
Copying the .o files from a third-party toolchain, the cross-compiler will 
progress a good deal further. However, it will fail when cross-compiling either 
glibc or newlib. In the case of newlib, it crashes 
at ../gcc/libstdc++-v3/libmath/stubs.c 
 
../../../../gcc/libstdc++-v3/libmath/stubs.c: In function 'floorl': 
/usr/mips/mipsisa64sb1-unknown-linux-gnu/include/bits/mathinline.h:530: error: 
impossible register constraint in 'asm' 
/usr/mips/mipsisa64sb1-unknown-linux-gnu/include/bits/mathinline.h:530: error: 
impossible register constraint in 'asm' 
../../../../gcc/libstdc++-v3/libmath/stubs.c:203: error: unrecognizable insn: 
(insn 20 19 21 
0 /usr/mips/mipsisa64sb1-unknown-linux-gnu/include/bits/mathinline.h:530 (set 
(reg/v:DF 32 $f0 [orig:195 __value ] [195]) 
        (asm_operands/v:DF ("frndint") ("=t") 0 [ 
                (reg/v:DF 32 $f0 [orig:195 __value ] [195]) 
            ] 
             [ 
                (asm_input:DF ("0")) 
            ] 
("/usr/mips/mipsisa64sb1-unknown-linux-gnu/include/bits/mathinline.h") 530)) -1 
(insn_list:REG_DEP_TRUE 19 (nil)) 
    (nil)) 
../../../../gcc/libstdc++-v3/libmath/stubs.c:203: internal compiler error: in 
reload_cse_simplify_operands, at postreload.c:393 
 
The cross-compiler was built using the following configuration settings: 
 
Target: mipsisa64sb1-unknown-linux-gnu 
Configured with: ../gcc/configure --target=mipsisa64sb1-unknown-linux-gnu 
--prefix=/usr/mips --without-headers --with-newlib --with-gnu-as --with-gnu-ld 
--with-local-prefix=/usr/mips/mipsisa64sb1-unknown-linux-gnu --disable-shared 
--enable-languages=c 
Thread model: posix 
gcc version 4.1.0 20050901 (experimental) 
 
I'm running out of ideas for workarounds to build a 64-bit bigendian MIPS 
toolchain, so any known-to-work workarounds or patches would be much 
appreciated.

-- 
           Summary: Crosscompiler looks for files it never built
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: imipak at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i386-linux-gnu
  GCC host triplet: i386-linux-gnu
GCC target triplet: mipsisa64sb1-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23687