| Age | Commit message (Collapse) | Author | Lines |
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| 2019年10月28日 | add time64 symbol name redirects to public headers, under arch control | Rich Felker | -0/+5 |
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a _REDIR_TIME64 macro is introduced, which the arch's alltypes.h is
expected to define, to control redirection of symbol names for
interfaces that involve time_t and derived types. this ensures that
object files will only be linked to libc interfaces matching the ABI
whose headers they were compiled against.
along with time32 compat shims, which will be introduced separately,
the redirection also makes it possible for a single libc (static or
shared) to be used with object files produced with either the old
(32-bit time_t) headers or the new ones after 64-bit time_t switchover
takes place. mixing of such object files (or shared libraries) in the
same program will also be possible, but must be done with care; ABI
between libc and a consumer of the libc interfaces is guaranteed to
match by the the symbol name redirection, but pairwise ABI between
consumers of libc that define interfaces between each other in terms
of time_t is not guaranteed to match.
this change adds a dependency on an additional "GNU C" feature to the
public headers for existing 32-bit archs, which is generally
undesirable; however, the feature is one which glibc has depended on
for a long time, and thus which any viable alternative compiler is
going to need to provide. 64-bit archs are not affected, nor will
future 32-bit archs be, regardless of whether they are "new" on the
kernel side (e.g. riscv32) or just newly-added (e.g. a new sparc or
xtensa port). the same applies to newly-added ABIs for existing
machine-level archs.
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| 2016年07月03日 | make brace placement in public header typedef'd structs consistent | Rich Felker | -2/+1 |
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commit befa5866ee30d09c0c96e88af2eabff5911342ea performed this change
for struct definitions that did not also involve typedef, but omitted
the latter.
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| 2013年07月06日 | add NFDBITS in sys/select.h with appropriate feature tests | Rich Felker | -0/+3 |
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the main use for this macro seems to be knowing the correct allocation
granularity for dynamic-sized fd_set objects. such usage is
non-conforming and results in undefined behavior, but it is widespread
in applications.
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| 2012年09月08日 | remove all remaining redundant __restrict/__inline/_Noreturn defs | Rich Felker | -5/+1 |
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| 2012年09月06日 | use restrict everywhere it's required by c99 and/or posix 2008 | Rich Felker | -2/+8 |
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to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.
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| 2011年09月23日 | FD_ISSET must return an int. this is the easiest way. | Rich Felker | -1/+1 |
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casting to int would not be correct because high bits could be lost.
mapping the high bits down onto low bits would be costlier in the
common case where the result is just used in a conditional. changing
the type of the bit array elements to int would permute the order of
the bit array on 64-bit big endian systems, so that's not an option
either.
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| 2011年08月27日 | fix broken FD_* macros on 64-bit targets | Rich Felker | -3/+3 |
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1 is too small if int is 32-bit but unsigned long is 64-bit. be
explicit and use 1UL.
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| 2011年04月14日 | add useless type fd_mask. it's in the reserved namespace. | Rich Felker | -0/+2 |
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| 2011年04月13日 | fix and cleanup suseconds_t/timeval stuff (broken on 64-bit) | Rich Felker | -0/+1 |
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trash in the upper 32 bits was making the kernel sleep forever in
select on 64-bit systems.
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| 2011年02月12日 | initial check-in, version 0.5.0 v0.5.0 | Rich Felker | -0/+34 |
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