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Redefine _IO_iconv_t to store a single gconv step pointer [BZ #25097]

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libio can only deal with gconv conversions which consist of a single
step.  Not using __gconv_info simplifies the data structures somewhat.

This eliminates a new GCC 10 warning about subscribing an inner
zero-length array.

Tested on x86_64-linux-gnu with mainline GCC.  Built with
build-many-glibcs.py, also with mainline GCC.  Due to GCC PR 92039,
there are failures left on 32-bit architectures with float128 support.

Change-Id: I8b4c489b619a53154712ff32e1b6f13bb92d4203
This commit is contained in:
Florian Weimer
2019-11-03 11:39:56 +01:00
parent 15740788d7
commit 70c6e15654
4 changed files with 46 additions and 57 deletions
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4
libio/iofclose.c
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@ -62,8 +62,8 @@ _IO_new_fclose (FILE *fp)
struct _IO_codecvt *cc = fp->_codecvt;
__libc_lock_lock (__gconv_lock);
__gconv_release_step (cc->__cd_in.__cd.__steps);
__gconv_release_step (cc->__cd_out.__cd.__steps);
__gconv_release_step (cc->__cd_in.step);
__gconv_release_step (cc->__cd_out.step);
__libc_lock_unlock (__gconv_lock);
}
else