[PATCH 18/25] sparc: refactor sparc32 copysign selector to C

[Joseph Myers]

I'm seeing a build failure for sparcv9-linux-gnu.

https://sourceware.org/ml/libc-testresults/2017-q4/msg00399.html

../sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.c:33:32: error: 'copysign' aliased to external symbol '__copysign'
 libm_alias_double (__copysign, copysign)
                                ^
./../include/libc-symbols.h:146:26: note: in definition of macro '_weak_alias'
   extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
                          ^~~~~~~~~
../sysdeps/ieee754/ldbl-opt/libm-alias-double.h:44:3: note: in expansion of macro 'weak_alias'
   weak_alias (from ## r, to ## r);    \
   ^~~~~~~~~~
../sysdeps/ieee754/ldbl-opt/libm-alias-double.h:53:37: note: in expansion of macro 'libm_alias_double_r'
 #define libm_alias_double(from, to) libm_alias_double_r (from, to, )
                                     ^~~~~~~~~~~~~~~~~~~
../sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.c:33:1: note: in expansion of macro 'libm_alias_double'
 libm_alias_double (__copysign, copysign)
 ^~~~~~~~~~~~~~~~~
/scratch/jmyers/glibc-bot/build/glibcs/sparcv9-linux-gnu/glibc/sysd-rules:67: recipe for target '/scratch/jmyers/glibc-bot/build/glibcs/sparcv9-linux-gnu/glibc/math/s_copysign.os' failed
make[3]: *** [/scratch/jmyers/glibc-bot/build/glibcs/sparcv9-linux-gnu/glibc/math/s_copysign.os] Error 1

-- 
Joseph S. Myers
joseph@codesourcery.com