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Adds a more comprehensive check for fdatasync #42

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Merged
merged 1 commit into from
Mar 9, 2015
Merged

Adds a more comprehensive check for fdatasync #42

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21 changes: 20 additions & 1 deletion configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,26 @@ AC_CHECK_FUNCS([lutimes futimes])
AC_CHECK_FUNCS([mkstemps mkdtemp])

# Functions for file synchronization and allocation control
AC_CHECK_FUNCS([fsync fdatasync])
AC_CHECK_FUNCS([fsync])

# A more comprehensive check that fdatasync exits
# Necessary for platforms that have fdatasync in headers but have no
# implementation
dnl Originally provided by user copiousfreetime for the beanstalkd project
dnl {{{ make sure that fdatasync exits
AC_CACHE_CHECK([for fdatasync],[ac_cv_func_fdatasync],[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <unistd.h>
]],[[
fdatasync(4);
]])],
[ac_cv_func_fdatasync=yes],
[ac_cv_func_fdatasync=no])
])
AS_IF([test "x${ac_cv_func_fdatasync}" = "xyes"],
[AC_DEFINE([HAVE_FDATASYNC],[1],[If the system defines fdatasync])])
dnl }}}

AC_CHECK_FUNCS([posix_fadvise posix_fallocate])

# Avoid adding rt if absent or unneeded
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