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#serial 3
dnl From Jim Meyering.
dnl
dnl See if the glibc *_unlocked I/O macros are available.
dnl Use only those *_unlocked macros that are declared.
dnl
AC_DEFUN(jm_FUNC_GLIBC_UNLOCKED_IO,
[
io_functions='clearerr_unlocked feof_unlocked ferror_unlocked
fflush_unlocked fputc_unlocked fread_unlocked fwrite_unlocked
getc_unlocked getchar_unlocked putc_unlocked putchar_unlocked'
for jm_io_func in $io_functions; do
# Check for the existence of each function only if its declared.
# Otherwise, we'd get the Solaris5.5.1 functions that are not
# declared, and that have been removed from Solaris5.6. The resulting
# 5.5.1 binaries would not run on 5.6 due to shared library differences.
AC_CHECK_DECLS(($jm_io_func),
jm_declared=yes,
jm_declared=no,
[#include <stdio.h>])
if test $jm_declared = yes; then
AC_CHECK_FUNCS($jm_io_func)
fi
done
]
)
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