Nginx Configuration saying Not found. Why and How to get rid of it?

Hi,

I am compiling and installing NGinx from source and installed all
following
lib

sudo yum install gcc
gcc-c++
pcre-devel
zlib-devel
make
unzip
openssl-devel
libaio-devel
glibc
glibc-devel
glibc-headers
libevent
linux-vdso.so.1
libpthread.so.0
libcrypt.so.1
libstdc++.so.6
librt.so.1
libm.so.6
libpcre.so.0
libssl.so.10
libcrypto.so.10
libdl.so.2
libz.so.1
libgcc_s.so.1
libc.so.6
/lib64/ld-linux-x86-64.so.2
libfreebl3.so
libgssapi_krb5.so.2
libkrb5.so.3
libcom_err.so.2
libk5crypto.so.3
libkrb5support.so.0
libkeyutils.so.1
libresolv.so.2
libselinux.so.1

$yum groupinstall ‘Development Tools’

But when I run the following configure command on REHL found some “not
found”

$./configure
–with-debug
–prefix=/etc/nginx
–sbin-path=/usr/sbin/nginx
–conf-path=/etc/nginx/nginx.conf
–pid-path=/var/run/nginx.pid
–lock-path=/var/run/nginx.lock
–error-log-path=/var/log/nginx/error.log
–http-log-path=/var/log/nginx/access.log
–with-http_gzip_static_module
–with-http_stub_status_module
–with-http_realip_module
–with-http_secure_link_module
–with-pcre
–with-file-aio
–with-cc-opt="-DTCP_FASTOPEN=23"
–with-ld-opt="-L /usr/local/lib"
–without-http_scgi_module
–without-http_uwsgi_module
–without-http_fastcgi_module
| grep ‘not found’

got the following output

checking for sys/filio.h … not found
checking for /dev/poll … not found
checking for kqueue … not found
checking for crypt() … not found
checking for F_READAHEAD … not found
checking for F_NOCACHE … not found
checking for directio() … not found
checking for dlopen() … not found
checking for SO_SETFIB … not found
checking for SO_ACCEPTFILTER … not found
checking for kqueue AIO support … not found
checking for setproctitle() … not found
checking for POSIX semaphores … not found
checking for struct dirent.d_namlen … not found

I figure out that the followings are found with another one
crypt
dlopen
kqueue
poll
POSIX semaphores

But other are not found yet. Why this is happening? How to resolve
those?
and Is it ok having not found while configuration. I am afraid to go
further
skipping these not found issues

Thanks in advance

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,256013,256013#msg-256013

checking for directio() … not found
crypt
dlopen
kqueue
poll
POSIX semaphores

But other are not found yet. Why this is happening? How to resolve those?
and Is it ok having not found while configuration. I am afraid to go further
skipping these not found issues

The configure script will worry about those things. Unless you see an
actual
error, you don’t need to worry. “Not found” is an information, not an
error
in this context, and is expected (for example kqueue is a BSD feature,
you
don’t have it on linux).

Lukas