diff options
| author | Thomas Munro | 2018-11-06 20:50:01 +0000 |
|---|---|---|
| committer | Thomas Munro | 2018-11-06 20:50:01 +0000 |
| commit | 3fd2a7932ef0708dda57369bb20c0499d905cc82 (patch) | |
| tree | e88ac8da2265607cfdc4fc3fbae46b2a96f3010a /configure | |
| parent | b43df566b372650a9b9e2a0dd9e695c1f16da14f (diff) | |
Provide pg_pread() and pg_pwrite() for random I/O.
Forward to POSIX pread() and pwrite(), or emulate them if unavailable.
The emulation is not perfect as the file position is changed, so
we'll put pg_ prefixes on the names to minimize the risk of confusion
in future patches that might inadvertently try to mix pread() and read()
on the same file descriptor.
Author: Thomas Munro
Reviewed-by: Tom Lane, Jesper Pedersen
Discussion: https://postgr.es/m/CAEepm=02rapCpPR3ZGF2vW=SBHSdFYO_bz_f-wwWJonmA3APgw@mail.gmail.com
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/configure b/configure index 748abaffc2b..a600fdfac38 100755 --- a/configure +++ b/configure @@ -15539,6 +15539,32 @@ esac fi +ac_fn_c_check_func "$LINENO" "pread" "ac_cv_func_pread" +if test "x$ac_cv_func_pread" = xyes; then : + $as_echo "#define HAVE_PREAD 1" >>confdefs.h + +else + case " $LIBOBJS " in + *" pread.$ac_objext "* ) ;; + *) LIBOBJS="$LIBOBJS pread.$ac_objext" + ;; +esac + +fi + +ac_fn_c_check_func "$LINENO" "pwrite" "ac_cv_func_pwrite" +if test "x$ac_cv_func_pwrite" = xyes; then : + $as_echo "#define HAVE_PWRITE 1" >>confdefs.h + +else + case " $LIBOBJS " in + *" pwrite.$ac_objext "* ) ;; + *) LIBOBJS="$LIBOBJS pwrite.$ac_objext" + ;; +esac + +fi + ac_fn_c_check_func "$LINENO" "random" "ac_cv_func_random" if test "x$ac_cv_func_random" = xyes; then : $as_echo "#define HAVE_RANDOM 1" >>confdefs.h |