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| author |  Elliot Robinson <elliot.robinson@argiopetech.com> | 2015-03-08 15:55:05 -0400 |
|---|---|---|
| committer | Elliot Robinson <elliot.robinson@argiopetech.com> | 2015-03-08 15:55:05 -0400 |
| commit | b06446edd4753f964a46d27ddae864fad97adc13 (patch) | |
| tree | d7d4617d8d3ac8c2a2a674452fda2d6461df077b /configure.ac | |
| parent | fa24cebd8246aabc0d590fc22561f90e6b1252df (diff) | |
Adds a more comprehensive check for fdatasync
Some versions of OS X have fdatasync in the headers but don't include implementations in the standard library. This leads to a compile failure in configure.ac when using AC_CHECK_FUNCS.
This change explicitly attempts to compile a file containing a call to fdatasync and properly sets the AC_CHECK_FUNCS flags depending on the result of compilation.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index f7b1afb..c63b45b 100644 --- a/configure.ac +++ b/configure.ac @@ -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 |