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configure: fix F_SETPIPE_SZ detection

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Currently CEPH_HAVE_SETPIPE_SZ is not set even if F_SETPIPE_SZ is
available, because AC_COMPILE_IFELSE test program as written always
fails to compile.  F_SETPIPE_SZ is a macro, so use AC_EGREP_CPP which
works on the preprocessor output instead of trying to compile.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
This commit is contained in:
Ilya Dryomov 2014-02-10 19:34:44 +02:00
parent 450163ec40
commit a5f479c2aa
1 changed files with 15 additions and 5 deletions
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20
configure.ac
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@ -640,11 +640,21 @@ AC_CHECK_FUNC([splice],
[AC_DEFINE([CEPH_HAVE_SPLICE], [], [splice(2) is supported])],
[])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <fcntl.h>
F_SETPIPE_SZ]])],
[AC_DEFINE([CEPH_HAVE_SETPIPE_SZ], [], [F_SETPIPE_SZ is supported])],
[AC_MSG_NOTICE(["F_SETPIPE_SZ not found, zero-copy may be less efficent"])])
# F_SETPIPE_SZ in fcntl.h
AC_MSG_CHECKING([for F_SETPIPE_SZ in fcntl.h])
AC_EGREP_CPP([yes_have_f_setpipe_sz], [
#define _GNU_SOURCE
#include <fcntl.h>
#ifdef F_SETPIPE_SZ
yes_have_f_setpipe_sz
#endif
], [
AC_MSG_RESULT([yes])
AC_DEFINE([CEPH_HAVE_SETPIPE_SZ], [], [F_SETPIPE_SZ is supported])
], [
AC_MSG_RESULT([no])
AC_MSG_NOTICE([F_SETPIPE_SZ not found, zero-copy may be less efficent])
])
AC_CHECK_FUNCS([posix_fallocate])
AC_CHECK_HEADERS([sys/prctl.h])