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author | Joseph Myers <joseph@codesourcery.com> | 2015-03-07 01:39:42 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2015-03-07 01:39:42 +0000 |
commit | b838844bc5028b2b3401af9f0f51687d8a1f8a54 (patch) | |
tree | bd3df50946aab64591337ea1852a3a39ca36dbd8 /libio/genops.c | |
parent | e0ed2fb40a0e29c43cf60addc74741dab15f2e05 (diff) | |
download | glibc-b838844bc5028b2b3401af9f0f51687d8a1f8a54.tar.gz glibc-b838844bc5028b2b3401af9f0f51687d8a1f8a54.tar.xz glibc-b838844bc5028b2b3401af9f0f51687d8a1f8a54.zip |
soft-fp: Support conditional zero-initialization in declarations.
In the Linux kernel, some architectures have a single function that uses different kinds of unpacking and packing depending on the instruction being emulated, meaning it is not readily visible to the compiler that variables from _FP_DECL and _FP_FRAC_DECL_* macros are only used in cases where they were initialized. The existing copy of soft-fp in the Linux kernel uses zero-initialization to avoid warnings in this case, so while frowned upon as a warning suppression mechanism in code built for glibc it seems appropriate to have such zero-initialization conditional on __KERNEL__. This patch duly adds it, via a macro _FP_ZERO_INIT that expands to empty for non-kernel compilations. Tested for powerpc-nofpu that installed stripped shared libraries are unchanged by this patch. * soft-fp/soft-fp.h (_FP_ZERO_INIT): New macro. Define depending on [__KERNEL__]. * soft-fp/op-1.h (_FP_FRAC_DECL_1): Use _FP_ZERO_INIT. * soft-fp/op-2.h (_FP_FRAC_DECL_2): Likewise. * soft-fp/op-common.h (_FP_DECL): Likewise.
Diffstat (limited to 'libio/genops.c')
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