stdioext: Add support for musl libc. * m4/fbufmode.m4 (gl_FUNC_FBUFMODE): Test whether __fbufsize exists. * lib/fbufmode.c (fbufmode): Add conditional code for musl. * m4/fseterr.m4: New file. * lib/fseterr.h (fseterr): Define as an alias of __fseterr if that function exists. * modules/fseterr (Files): Add m4/fseterr.m4. (configure.ac): Invoke gl_FUNC_FSETERR. Compile fseterr.c if __fseterr does not exist. (Makefile.am): Remove fseterr.c from lib_SOURCES. * lib/freadable.h: Update comment. * lib/fwritable.h: Update comment. * lib/freading.h: Update comment. * lib/fwriting.h: Update comment. * m4/freadahead.m4: New file. * lib/freadahead.h (freadahead): Define as an alias of __freadahead if that function exists. * modules/freadahead (Files): Add m4/freadahead.m4. (configure.ac): Invoke gl_FUNC_FREADAHEAD. Compile freadahead.c if __freadahead does not exist. (Makefile.am): Remove freadahead.c from lib_SOURCES. * m4/freadptr.m4: New file. * lib/freadptr.h (freadptr): Define as an alias of __freadptr if that function exists. * modules/freadptr (Files): Add m4/freadptr.m4. (configure.ac): Invoke gl_FUNC_FREADPTR. Compile freadptr.c if __freadptr does not exist. (Makefile.am): Remove freadptr.c from lib_SOURCES. * m4/freadseek.m4: New file. * lib/freadseek.c (freadptrinc): Use __freadptrinc if that function exists. * modules/freadseek (Files): Add m4/freadseek.m4. (configure.ac): Invoke gl_FUNC_FREADSEEK. * lib/fpurge.c (fpurge): Update comment. Reported by and with help from Rich Felker <dalias@aerifal.cx>.

Description:
renameat() function: rename a file, relative to two directories

Files:
lib/at-func2.c
lib/renameat.c
m4/renameat.m4

Depends-on:
stdio
extensions
fcntl-h
filenamecat-lgpl [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
openat-h         [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
fstatat          [test $REPLACE_RENAMEAT = 1]
stdbool          [test $REPLACE_RENAMEAT = 1]
at-internal      [test $HAVE_RENAMEAT = 0]
dosname          [test $HAVE_RENAMEAT = 0]
fstat            [test $HAVE_RENAMEAT = 0]
getcwd-lgpl      [test $HAVE_RENAMEAT = 0]
openat-die       [test $HAVE_RENAMEAT = 0]
rename           [test $HAVE_RENAMEAT = 0]
same-inode       [test $HAVE_RENAMEAT = 0]
save-cwd         [test $HAVE_RENAMEAT = 0]

configure.ac:
gl_FUNC_RENAMEAT
if test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1; then
  AC_LIBOBJ([renameat])
fi
if test $HAVE_RENAMEAT = 0; then
  AC_LIBOBJ([at-func2])
fi
gl_STDIO_MODULE_INDICATOR([renameat])

Makefile.am:

Include:
<fcntl.h>
<stdio.h>

License:
GPL

Maintainer:
Jim Meyering, Eric Blake