configure.in

unix网络编程第一卷socket编程书上的全部源代码

dnl
dnl autoconf script for UNP 3/e Volume 1 source code.
dnl Process this file with autoconf to produce a configure script.
dnl
dnl The end result of running configure is the "config.h" file and the
dnl "Make.defines" file in the current directory.  These two files are
dnl created from the "config.h.in" and "Make.defines.in" files in the
dnl current directory.
dnl
dnl The header "unp.h" that is in every source directory then does a
dnl #include "../config.h" and the Makefile in each source directory
dnl then does a include of ../Make.defines.
dnl
AC_REVISION($Revision: 1.13 $)
AC_INIT(lib/unp.h)
AC_CANONICAL_HOST
AC_CONFIG_HEADER(config.h)

dnl The following cpu_vendor_os string goes into config.h.
dnl
AC_DEFINE_UNQUOTED(CPU_VENDOR_OS, "$host", [CPU, vendor, and operating system])

dnl ##################################################################
dnl Checks for programs.
dnl

dnl Some system-specific stuff ...
dnl Some operating systems require additional flags in order to get all
dnl the definitions that we're looking for in some system headers.
dnl The configure script uses both CFLAGS and CPPFLAGS when compiling.
case "$host_os" in
*aix*)		CPPFLAGS="$CPPFLAGS -D_ALL_SOURCE" ;;
*osf*)		CPPFLAGS="$CPPFLAGS -D_SOCKADDR_LEN" ;;
esac

AC_PROG_CC
AC_PROG_RANLIB

dnl ##################################################################
dnl Checks for libraries.
dnl The order of these tests is the *reverse* order of the libraries in
dnl the LIBS variable that is constructed: each new one gets prepended,
dnl not appended.
dnl
dnl We are building three strings here; something like:
dnl	LIBS="-lresolv -lsocket -lnsl -lpthread"
dnl	LIBS_XTI="-lxti -lresolv -lnsl -lpthread"
dnl	LIBUNP="./libunp.a"
dnl	LIBUNPXTI="./libunpxti.a"
dnl
dnl If a threads library is found, need to update CFLAGS too.
dnl
AC_CHECK_LIB(pthread, pthread_create)
if test "$ac_cv_lib_pthread_pthread_create" = yes ; then
   CFLAGS="$CFLAGS -D_REENTRANT"
else
   AC_CHECK_LIB(pthreads, pthread_create)
   if test "$ac_cv_lib_pthreads_pthread_create" = yes ; then
      CFLAGS="$CFLAGS -D_REENTRANT"
   fi
fi

AC_CHECK_LIB(nsl, t_open)
AC_SEARCH_LIBS(socket, socket)

dnl Bind 8.1.1 places its library in /usr/local/bind/lib/libbind.a; we check
dnl for it first.  Also check for libbind.a in user's home directory.
dnl If there is a libresolv.a in the user's HOME directory, we will use
dnl that instead of -lresolv.  Need this for people interested in building
dnl an IPv6-knowledgable resolver, instead of using the system provided
dnl resolver (which is often way out of date).
dnl
AC_MSG_CHECKING(for /usr/local/bind/lib/libbind.a)
if test -f /usr/local/bind/lib/libbind.a ; then
	AC_MSG_RESULT(yes)
	LIBS="/usr/local/bind/lib/libbind.a  $LIBS"
else
	AC_MSG_RESULT(no)
	AC_MSG_CHECKING(for $HOME/libbind.a)
	if test -f $HOME/libbind.a ; then
		AC_MSG_RESULT(yes)
		LIBS="$HOME/libbind.a  $LIBS"
	else
		AC_MSG_RESULT(no)
		AC_MSG_CHECKING(for $HOME/libresolv.a)
		if test -f $HOME/libresolv.a ; then
			AC_MSG_RESULT(yes)
			LIBS="$HOME/libresolv.a  $LIBS"
		else
			AC_MSG_RESULT(no)
			AC_CHECK_LIB(resolv, res_init)
		fi
	fi
fi

dnl Now check for XTI library.
dnl
AC_CHECK_LIB(xti, t_open)

dnl We now need to check for our own libraries, but we cannot prepend
dnl them to the LIBS variable, as that variable is used when compiling
dnl programs later in this script, and that would mess things up.
dnl
dnl If the user has a file named $HOME/libunp.a, then use it.
dnl Else store our library in current directory.
dnl I use this because my source directory is NFS mounted from my various
dnl systems, but I have a unique home directory on each system.
dnl
AC_MSG_CHECKING(for $HOME/libunp.a)
if test -f $HOME/libunp.a ; then
	AC_MSG_RESULT(yes)
	LIBUNP="$HOME/libunp.a"
	LIBUNP_NAME=$HOME/libunp.a
else
	AC_MSG_RESULT(no, using ./libunp.a)
	LIBUNP="../libunp.a"
	LIBUNP_NAME=../libunp.a
fi

dnl If the user has a file named $HOME/libunpxti.a, then use it.
dnl Else store our library in current directory.
dnl Same reasoning as above.
dnl
AC_MSG_CHECKING(for $HOME/libunpxti.a)
if test -f $HOME/libunpxti.a ; then
	AC_MSG_RESULT(yes)
	LIBUNPXTI="$HOME/libunpxti.a"
	LIBUNPXTI_NAME=$HOME/libunpxti.a
else
	AC_MSG_RESULT(no, using ./libunpxti.a)
	LIBUNPXTI="../libunpxti.a"
	LIBUNPXTI_NAME=../libunpxti.a
fi

dnl ##################################################################
dnl Checks for header files.
dnl
dnl The list of headers in the AC_CHECK_HEADERS macro is the same as in
dnl our "unp.h" header, followed by our "unpxti.h" header.
dnl
AC_HEADER_STDC
dnl
dnl The includes (the 4th argument to AC_CHECK_HEADERS) here are
dnl the defeault set ($ac_includes_default) plus <sys/param.h>
dnl for <sys/sysctl.h> on NetBSD and OpenBSD.
AC_CHECK_HEADERS(sys/types.h sys/socket.h sys/time.h time.h netinet/in.h arpa/inet.h errno.h fcntl.h netdb.h signal.h stdio.h stdlib.h string.h sys/stat.h sys/uio.h unistd.h sys/wait.h sys/un.h sys/param.h sys/select.h sys/sysctl.h poll.h sys/event.h strings.h sys/ioctl.h sys/filio.h sys/sockio.h pthread.h net/if_dl.h xti.h xti_inet.h netconfig.h netdir.h stropts.h, [], [], [
#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#if STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# if HAVE_STDLIB_H
#  include <stdlib.h>
# endif
#endif
#if HAVE_STRING_H
# if !STDC_HEADERS && HAVE_MEMORY_H
#  include <memory.h>
# endif
# include <string.h>
#endif
#if HAVE_STRINGS_H
# include <strings.h>
#endif
#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# if HAVE_STDINT_H
#  include <stdint.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif])

dnl ##################################################################
dnl Checks for typedefs.
dnl
dnl We use our own AC_UNP_CHECK_TYPE macro, instead of AC_CHECK_TYPE,
dnl to #include more headers.  Our macro is defined in "aclocal.m4".
dnl
AC_HEADER_TIME
AC_UNP_CHECK_TYPE(uint8_t, unsigned char, 8-bit unsigned type)
AC_UNP_CHECK_TYPE(int16_t, short, 16 bit signed type)
AC_UNP_CHECK_TYPE(uint16_t, unsigned short, 16 bit unsigned type)
AC_UNP_CHECK_TYPE(int32_t, int, 32 bit signed type)
AC_UNP_CHECK_TYPE(uint32_t, unsigned int, 32 bit unsigned type)
AC_UNP_CHECK_TYPE(size_t, unsigned int, unsigned integer type of the result of the sizeof operator)
AC_UNP_CHECK_TYPE(ssize_t, int, a signed type appropriate for a count of bytes or an error indication)
AC_UNP_CHECK_TYPE(socklen_t, unsigned int, a type appropriate for address, hostname, buffer, etc. lengths)
dnl
dnl The SA_FAMILY_T in the following is #defined later, as its definition
dnl depends on whether socket address structures have a length field or not.
dnl
AC_UNP_CHECK_TYPE(sa_family_t, SA_FAMILY_T, the type of the sa_family struct member)

dnl We also have our own macro to check for XTI definitions, that can
dnl be defined after #include of our "unpxti.h" header.
dnl
AC_UNPXTI_CHECK_TYPE(t_scalar_t, int32_t, scalar type)
AC_UNPXTI_CHECK_TYPE(t_uscalar_t, uint32_t, unsigned scalar type)

dnl ##################################################################
dnl Check if sockaddr{} has sa_len member.
dnl
AC_CHECK_MEMBER([struct sockaddr.sa_len],
 AC_DEFINE(HAVE_SOCKADDR_SA_LEN, 1, define if socket address structures have length fields),,[
#include <sys/types.h>
#include <sys/socket.h>])

dnl Now we can complete the definition for sa_family_t, if needed.
dnl The size of this datatype depends whether socket address structures
dnl have a length field or not.
dnl
if test $ac_cv_type_sa_family_t = no ; then
   if test $ac_cv_member_struct_sockaddr_sa_len = yes ; then
      AC_DEFINE(SA_FAMILY_T, uint8_t, the size of the sa_family field in a socket address structure)
   else
      AC_DEFINE(SA_FAMILY_T, uint16_t)
   fi
fi

dnl
dnl Check for sockaddr_storage.
dnl If it's present, check for ss_family.
dnl If ss_family isn't there, check for __ss_family and
dnl  #define ss_family __ss_family if so.
dnl If neither is there, I don't know what to do.
dnl
AC_CHECK_TYPES([struct sockaddr_storage],
  AC_CHECK_MEMBER([struct sockaddr_storage.ss_family],,
   AC_CHECK_MEMBER([struct sockaddr_storage.__ss_family],
    AC_DEFINE([ss_family],[__ss_family],[define to __ss_family if sockaddr_storage has that instead of ss_family]),
    AC_MSG_ERROR([cannot find ss_family in sockaddr_storage]),[
#include <sys/types.h>
#include <sys/socket.h>]),[
#include <sys/types.h>
#include <sys/socket.h>]),,[
#include <sys/types.h>
#include <sys/socket.h>])

dnl Check if msghdr{} has msg_control member.
dnl
AC_CHECK_MEMBER([struct msghdr.msg_control],
 AC_DEFINE(HAVE_MSGHDR_MSG_CONTROL, 1, define if struct msghdr contains the msg_control member),,[
#include <sys/types.h>
#include <sys/socket.h>])

dnl
dnl Check for ifr_mtu in ifreq - some systems have SIOCGIFMTU
dnl but don't have ifr_mtu!!
AC_CHECK_MEMBERS([struct ifreq.ifr_mtu],,,
[#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>])

dnl ##################################################################
dnl Check for function prototypes in headers.
dnl AC_CHECK_FUNC_PROTO is our own macro in "aclocal.m4".
dnl
AC_CHECK_FUNC_PROTO(getaddrinfo, netdb.h)
AC_CHECK_FUNC_PROTO(getnameinfo, netdb.h)
AC_CHECK_FUNC_PROTO(gethostname, unistd.h)
AC_CHECK_FUNC_PROTO(getrusage, sys/resource.h)
AC_CHECK_FUNC_PROTO(hstrerror, netdb.h)
AC_CHECK_FUNC_PROTO(if_nametoindex, net/if.h)
AC_CHECK_FUNC_PROTO(inet_aton, arpa/inet.h)
AC_CHECK_FUNC_PROTO(inet_pton, arpa/inet.h)
AC_CHECK_FUNC_PROTO(pselect, sys/select.h)
AC_CHECK_FUNC_PROTO(snprintf, stdio.h)
AC_CHECK_FUNC_PROTO(sockatmark, sys/socket.h)
dnl
dnl autoheader doesn't know how to handle the above, so we have
dnl to help it out.
AH_TEMPLATE(HAVE_GETADDRINFO_PROTO, define if getaddrinfo prototype is in <netdb.h>)
AH_TEMPLATE(HAVE_GETNAMEINFO_PROTO, define if getnameinfo prototype is in <netdb.h>)
AH_TEMPLATE(HAVE_GETHOSTNAME_PROTO, define if gethostname prototype is in <unistd.h>)
AH_TEMPLATE(HAVE_GETRUSAGE_PROTO, define if getrusage prototype is in <sys/resource.h>)
AH_TEMPLATE(HAVE_HSTRERROR_PROTO, define if hstrerror prototype is in <netdb.h>)
AH_TEMPLATE(HAVE_IF_NAMETOINDEX_PROTO, define if if_nametoindex prototype is in <net/if.h>)
AH_TEMPLATE(HAVE_INET_ATON_PROTO, define if inet_aton prototype is in <arpa/inet.h>)
AH_TEMPLATE(HAVE_INET_PTON_PROTO, define if inet_pton prototype is in <arpa/inet.h>)
AH_TEMPLATE(HAVE_PSELECT_PROTO, define if pselect prototype is in <sys/stat.h>)
AH_TEMPLATE(HAVE_SNPRINTF_PROTO, define if snprintf prototype is in <stdio.h>)
AH_TEMPLATE(HAVE_SOCKATMARK_PROTO, define if sockatmark prototype is in <sys/socket.h>)

dnl ##################################################################
dnl Check for structure definitions.
dnl
AC_CHECK_TYPE(struct addrinfo,
 AC_DEFINE(HAVE_ADDRINFO_STRUCT, 1, Define to 1 if <netdb.h> defines struct addrinfo),,[
#include <netdb.h>])

dnl
AC_CHECK_TYPE(struct if_nameindex,
 AC_DEFINE(HAVE_IF_NAMEINDEX_STRUCT, 1, Define to 1 if <net/if.h> defines struct if_nameindex),,[
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>])

dnl
AC_CHECK_TYPE([struct sockaddr_dl],
 AC_DEFINE(HAVE_SOCKADDR_DL_STRUCT, 1, Define to 1 if <net/if_dl.h> defines struct sockaddr_dl),,[
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if_dl.h>])

dnl  OpenBSD puts struct timespec in <sys/time.h> instead of <time.h>,
dnl  thus this complex test.
AC_CHECK_TYPE([struct timespec],
 AC_DEFINE(HAVE_TIMESPEC_STRUCT, 1, Define to 1 if <time.h> or <sys/time.h> defines struct timespec),,[
#if TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
])

dnl ##################################################################
dnl Check for XTI devices.
dnl
AC_MSG_CHECKING(for /dev/tcp)
if test -r /dev/tcp ; then
	AC_DEFINE(HAVE_DEV_TCP, 1, Define to 1 if the /dev/tcp device exists)
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)

	AC_MSG_CHECKING(for /dev/xti/tcp)
	if test -r /dev/xti/tcp ; then
		AC_DEFINE(HAVE_DEV_XTI_TCP, 1, Define to 1 if the /dev/xti/tcp device exists)
		AC_MSG_RESULT(yes)
	else
		AC_MSG_RESULT(no)

		AC_MSG_CHECKING(for /dev/streams/xtiso/tcp)
		if test -r /dev/streams/xtiso/tcp ; then
			AC_DEFINE(HAVE_DEV_STREAMS_XTISO_TCP, 1, Define to 1 if the /dev/streams/xtiso/tcp device exists)
			AC_MSG_RESULT(yes)
		else
			AC_MSG_RESULT(no)
		fi
	fi
fi