[Bug math/31488] New: undefined reference to `fmod'" error for i586

[Bug math/31488] New: undefined reference to `fmod'" error for i586

[akhilesh.k at samsung dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

            Bug ID: 31488
           Summary: undefined reference to `fmod'" error for i586
           Product: glibc
           Version: 2.38
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: akhilesh.k at samsung dot com
  Target Milestone: ---

Hi 

I am using glibc 2.38, while Some of external module compilation I observed 
"undefined reference to `fmod'" error. 

I observed this only in x586 for risc-v working fine. 

Reason, for i586 no "fmod" week symbol in libm.so, but same symbol is available
in risc-v compiled libm.so  


Looks this behaviour is due to below changes. 

https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=16439f419b270184ec501c531bf20d83b6745fb0


i586 (no fmod week symbol)

khilesh.k@DELL-BUILD01:~source/build$ nm  lib/libm.so.6 | grep fmod
00000000000252a0 t __fmod
0000000000010af0 t __fmod_compat
00000000000143f0 t __fmod_compatf
0000000000038010 t __fmodf
0000000000063fb0 t __fmodf128
0000000000063fb0 W fmodf128
00000000000476e0 T __fmodf128_finite@GLIBC_2.26
0000000000038010 W fmodf32
00000000000252a0 W fmodf32x
00000000000252a0 W fmodf64
000000000000f320 W fmodf64x
0000000000038010 T __fmodf_finite@GLIBC_2.15
00000000000143f0 T fmodf@GLIBC_2.2.5
0000000000038010 T fmodf@@GLIBC_2.38
00000000000252a0 T __fmod_finite@GLIBC_2.15
0000000000010af0 T fmod@GLIBC_2.2.5
00000000000252a0 T fmod@@GLIBC_2.38
000000000000f320 t __fmodl
000000000000f320 W fmodl
0000000000015950 T __fmodl_finite@GLIBC_2.15
00000000000252a0 t __ieee754_fmod
0000000000038010 t __ieee754_fmodf
00000000000476e0 t __ieee754_fmodf128
0000000000015950 t __ieee754_fmodl
00000000000252a0 t __SI__fmod_1
0000000000010af0 t __SI__fmod_compat_0
00000000000143f0 t __SI__fmod_compatf_0
0000000000038010 t __SI__fmodf_0
00000000000252a0 t __SI__ieee754_fmod_0
0000000000038010 t __SI__ieee754_fmodf_1
00000000000476e0 t __SI__ieee754_fmodf128_0
0000000000015950 t __SI__ieee754_fmodl_0

Risc-v result (W fmod)

khilesh.k@DELL-BUILD01:~$ nm
./riscv64-none-linux-gnu/sys-root/lib64/lp64d/libm.so.6 | grep fmod
0000000000026c12 t __fmod
0000000000026c12 W fmod
00000000000346f2 t __fmodf
00000000000346f2 W fmodf
00000000000237e0 W fmodf128
00000000000346f2 W fmodf32
0000000000026c12 W fmodf32x
0000000000026c12 W fmodf64
00000000000237e0 W fmodf64x


Thanks 
Akhilesh

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[Bug math/31488] undefined reference to `fmod'" error for i586

[akhilesh.k at samsung dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

Akhilesh Kumar <akhilesh.k at samsung dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akhipatel at gmail dot com

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[Bug math/31488] undefined reference to `fmod'" error on i586

[akhilesh.k at samsung dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

Akhilesh Kumar <akhilesh.k at samsung dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|undefined reference to      |undefined reference to
                   |`fmod'" error for i586      |`fmod'" error on i586

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[Bug math/31488] undefined reference to `fmod'" error on i586

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |adhemerval.zanella at linaro dot o
                   |                            |rg

--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Could you provide the configure options, including the GCC one? I am trying to
reproduce it on 2.38 release branch and fmod is present:

i586-linux-gnu-master$ objdump -t math/libm.so | grep -w fmod
000104b0  w    F .text  000000b8              fmod

And this would be readily triggered by check-abi and math tests. Also,
16439f419b270184ec501c531bf20d83b6745fb0 commit should not matter for i686 (you
can check that it adds the fmod@2.38 to all but i386 abi).

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[Bug math/31488] undefined reference to `fmod'" error on i586

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
This is the symbol list for x86_64, not i586, and it defines fmod@@GLIBC_2.38
as expected.

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[Bug math/31488] undefined reference to `fmod'" error on i586

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
But the static libm.a for i586 does not define fmod and fmodf (I would expect
them to appear in w_fmod.o and w_fmodf.o, resp):

w_fmodl_compat.o:
w_fmod_compat.o:
w_fmodf_compat.o:
e_fmodl.o:
00000000 T __ieee754_fmodl
w_fmodl.o:
00000000 T __fmodl
         U __ieee754_fmodl
00000000 W fmodf64x
00000000 W fmodl
e_fmod.o:
00000000 T __ieee754_fmod
w_fmod.o:
e_fmodf.o:
00000000 T __ieee754_fmodf
w_fmodf.o:
e_fmodf128.o:
00000000 T __ieee754_fmodf128
         U __ieee754_fmodf128
         U __ieee754_fmodf128
w_fmodf128.o:
00000000 T __fmodf128
         U __ieee754_fmodf128
00000000 W fmodf128

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[Bug math/31488] undefined reference to `fmod'" error on i586

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

--- Comment #4 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Ah right, this is an issue for static build. I will take a look.

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[Bug math/31488] undefined reference to `fmod'" error on i586

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=31488

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sam at gentoo dot org

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