cross compiler for new target-machine problem

["Kim, Ji Hoon" <jhkim82 at gmail dot com>]

Hi there,

I'm trying to make new compiler for new processor.

So, I described "machine.c, machine.h, machine.md".

And for library, I use newlib. 

But, I can' link to c library like libgcc.a, libm.a, libc.a , etc.

So, I tested my linker with simple hand-writing codes and I knew
linker worked well.

If there is a c code like below, 

#include <math.h>
int main(){
    double a = 4.0;
    a = sqrt(a);
    return a;
}

I got the result like below when compiling.

/var/tmp//cckhwGLp.o(.text+0x44): In function `_main':
: undefined reference to `___fixdfsi'
/var/tmp//cckhwGLp.o(.text+0x44): In function `_main':
: relocation truncated to fit: R_MIPS_PC16 ___fixdfsi
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(w_sqrt.o)(.text+0x8c): In
function `sqrt':
../../../../../newlib/libm/math/w_sqrt.c:71: undefined reference to `___ltdf2'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(w_sqrt.o)(.text+0x8c):../../../../../newlib/libm/math/w_sqrt.c:71:
relocation truncated to fit: R_MIPS_PC16 ___ltdf2
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x1f8): In
function `__ieee754_sqrt':
../../../../../newlib/libm/math/e_sqrt.c:177: undefined reference to `___gedf2'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x1f8):../../../../../newlib/libm/math/e_sqrt.c:177:
relocation truncated to fit: R_MIPS_PC16 ___gedf2
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x23c):../../../../../newlib/libm/math/e_sqrt.c:180:
undefined reference to `___gtdf2'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x23c):../../../../../newlib/libm/math/e_sqrt.c:180:
relocation truncated to fit: R_MIPS_PC16 ___gtdf2
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x2ec):../../../../../newlib/libm/math/e_sqrt.c:117:
undefined reference to `___subdf3'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x34c):../../../../../newlib/libm/math/e_sqrt.c:117:
undefined reference to `___divdf3'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x34c):../../../../../newlib/libm/math/e_sqrt.c:117:
relocation truncated to fit: R_MIPS_PC16 ___divdf3
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x37c):../../../../../newlib/libm/math/e_sqrt.c:110:
undefined reference to `___muldf3'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x37c):../../../../../newlib/libm/math/e_sqrt.c:110:
relocation truncated to fit: R_MIPS_PC16 ___muldf3
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x39c):../../../../../newlib/libm/math/e_sqrt.c:110:
undefined reference to `___adddf3'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(e_sqrt.o)(.text+0x39c):../../../../../newlib/libm/math/e_sqrt.c:110:
relocation truncated to fit: R_MIPS_PC16 ___adddf3
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(s_matherr.o)(.text+0x34):
In function `matherr':
../../../../../newlib/libm/common/s_matherr.c:121: undefined reference
to `___nedf2'
/home/comm/lib/gcc-lib/mkr-elf/3.3.2/libm.a(s_matherr.o)(.text+0x34):../../../../../newlib/libm/common/s_matherr.c:121:
relocation truncated to fit: R_MIPS_PC16 ___nedf2
collect2: ld returned 1 exit status

And, I obtained libgcc.a, libc.a, libm.a, etc.


When I compile the newlib, I had an error during compile regex.c.

I found regex.c had a role that "Extended regular expression matching
and search library"

Then, does regex.c occur all my problems??

I can't find any reason why compiler doesn't work when used with
standard library.

Who can help me solve such a problem?

Thanks a lot.

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