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-fpic, -fpic -mpcrel, -fPIC, ... what to use for m68000?


Hi,

I am trying to build a cross toolchain for a plain Motorola m68000.

Packages used are:
binutils 2.21.1 with ./configure --target=m68k-elf --prefix=/usr/local/m68k/
gcc 4.6.1 with configure --target=m68k-elf --prefix=/usr/local/m68k/ --enable-languages=c,c++ --with-newlib --disable-libmudflap --disable-libssp --disable-libgomp --disable-libstdcxx-pch --disable-threads --with-gnu-as --with-gnu-ld --disable-nls --with-headers=yes --disable-checking --with-headers --disable-shared



I have tried to build everything with "-fPIC" as well as with "-fpic" and "-fpic -mpcrel". I never seem to get a toolchain, which is able to produce pic code above 64k of size.


Later compiling with -fPIC gives me many of these errors:
crtstuff.c:(.text+0xa): relocation truncated to fit: R_68K_GOT16 against symbol `_GLOBAL_OFFSET_TABLE_' defined in .got.plt section in /usr/local/m68k/lib/gcc/m68k-elf/4.6.1/../../../../m68k-elf/lib/m68000/crt0.o


Same source tried to compile with "-fpic -mpcrel" gives me these errors instead:
/tmp/ccvI64qp.s: Assembler messages:
/tmp/ccvI64qp.s:1839: Error: syntax error -- statement `cmp.b #0,(_fs:w,%pc).l' ignored
/tmp/ccvI64qp.s: Assembler messages:
/tmp/ccvI64qp.s:38: Error: syntax error -- statement `cmp.l (_cluster_size_table:w,%pc).l,%d2' ignored


Shouldn't be the -fPIC the right option? As I understand, -fpic produces code for 16-bit wide entries in the _GLOBAL_OFFSET_TABLE_, which is not enough for bigger programs. That's why one should use -fPIC. What why does this option fail as well?

Best regards
Simon


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