makedefs   [plain text]

#!/bin/sh

#++
# NAME
#	makedefs 1
# SUMMARY
#	Postfix makefile configuration utility
# SYNOPSIS
#	\fBmake makefiles \fIname=value...\fR
# DESCRIPTION
#	The \fBmakedefs\fR command identifies the compilation
#	environment, and emits macro definitions on the standard
#	output stream that can be prepended to template Makefiles.
#	These macros implement an internal interface and are subject
#	to change without notice.
#
#	Default settings can be overruled by specifying them as
#	environment variables (or as name=value pairs on the "make"
#	command line). Use quotes if variables contain whitespace
#	or shell meta characters.
#
#	The command "make makefiles name=value..." will replace the
#	string MAIL_VERSION at the end of a parameter value with
#	the Postfix release version. Do not try to specify something
#	like $mail_version on this command line. This produces
#	inconsistent results with different versions of the make(1)
#	command.
# .IP \fBAUXLIBS=\fIobject_library...\fR
#	Specifies one or more non-default object libraries. Postfix
#	2,12 and later specify some of their database library
#	dependencies with AUXLIBS_CDB, AUXLIBS_LDAP, AUXLIBS_LMDB,
#	AUXLIBS_MYSQL, AUXLIBS_PCRE, AUXLIBS_PGSQL, AUXLIBS_SDBM,
#	and AUXLIBS_SQLITE, respectively.
# .IP \fBCC=\fIcompiler_command\fR
#	Specifies a non-default compiler. On many systems, the default
#	is \fBgcc\fR.
# .IP \fBCCARGS=\fIcompiler_arguments\fR
#	Specifies non-default compiler arguments, for example, a non-default
#	\fIinclude\fR directory.
#	The following directives are special:
# .RS
# .IP \fB-DNO_DB\fR
#	Do not build with Berkeley DB support.
# .IP \fB-DNO_DEVPOLL\fR
#	Do not build with Solaris /dev/poll support.
#	By default, /dev/poll support is compiled in on platforms that
#	are known to support it.
# .IP \fB-DNO_DNSSEC\fR
#	Do not build with DNSSEC support, even if the resolver
#	library appears to support it.
# .IP \fB-DNO_EPOLL\fR
#	Do not build with Linux EPOLL support.
#	By default, EPOLL support is compiled in on platforms that
#	are known to support it.
# .IP \fB-DNO_EAI\fR
#	Do not build with EAI (SMTPUTF8) support. By default, EAI
#	support is compiled in when the "icu-config" command is
#	found.
# .IP \fB-DNO_INLINE\fR
#	Do not require support for C99 "inline" functions. Instead,
#	implement argument typechecks for non-(printf/scanf)-like
#	functions with ternary operators and unreachable code.
# .IP \fB-DNO_IPV6\fR
#	Do not build with IPv6 support.
#	By default, IPv6 support is compiled in on platforms that
#	are known to have IPv6 support.
#
#	Note: this directive is for debugging and testing only. It
#	is not guaranteed to work on all platforms. If you don't
#	want IPv6 support, set "inet_protocols = ipv4" in main.cf.
# .IP \fB-DNO_IP_CYRUS_SASL_AUTH\fR
#	Don't pass remote SMTP client and Postfix SMTP server IP
#	address and port information to the Cyrus SASL library.
#	This is compatible with Postfix < 3.2.
# .IP \fB-DNO_KQUEUE\fR
#	Do not build with FreeBSD/NetBSD/OpenBSD/MacOSX KQUEUE support.
#	By default, KQUEUE support is compiled in on platforms that
#	are known to support it.
# .IP \fB-DNO_NIS\fR
#	Do not build with NIS or NISPLUS support. Support for NIS
#	is unavailable on some recent Linux distributions.
# .IP \fB-DNO_NISPLUS\fR
#	Do not build with NISPLUS support. Support for NISPLUS
#	is unavailable on some recent Solaris distributions.
# .IP \fB-DNO_PCRE\fR
#	Do not build with PCRE support.
#	By default, PCRE support is compiled in when the \fBpcre-config\fR
#	utility is installed.
# .IP \fB-DNO_POSIX_GETPW_R\fR
#	Disable support for POSIX getpwnam_r/getpwuid_r.
# .IP \fB-DNO_SIGSETJMP\fR
#	Use setjmp()/longjmp() instead of sigsetjmp()/siglongjmp().
#	By default, Postfix uses sigsetjmp()/siglongjmp() when they
#	appear to work.
# .IP \fB-DNO_SNPRINTF\fR
#	Use sprintf() instead of snprintf(). By default, Postfix
#	uses snprintf() except on ancient systems.
# .RE
# .IP \fBDEBUG=\fIdebug_level\fR
#	Specifies a non-default debugging level. The default is \fB-g\fR.
#	Specify \fBDEBUG=\fR to turn off debugging.
# .IP \fBOPT=\fIoptimization_level\fR
#	Specifies a non-default optimization level. The default is \fB-O\fR.
#	Specify \fBOPT=\fR to turn off optimization.
# .IP \fBPOSTFIX_INSTALL_OPTS=\fI-option...\fR
#	Specifies options for the postfix-install command, separated
#	by whitespace. Currently, the only supported option is
#	\fB-keep-build-mtime\fR.
# .IP \fBSHLIB_CFLAGS=\fIflags\fR
#	Override the compiler flags (typically, "-fPIC") for Postfix
#	dynamically-linked libraries and database plugins.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBSHLIB_RPATH=\fIrpath\fR
#	Override the runpath (typically, "'-Wl,-rpath,${SHLIB_DIR}'")
#	for Postfix dynamically-linked libraries.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBSHLIB_SUFFIX=\fIsuffix\fR
#	Override the filename suffix (typically, ".so") for Postfix
#	dynamically-linked libraries and database plugins.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBshared=yes\fR
# .IP \fBshared=no\fR
#	Enable (disable) Postfix builds with dynamically-linked
#	libraries typically named $shlib_directory/libpostfix-*.so.*.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBdynamicmaps=yes\fR
# .IP \fBdynamicmaps=no\fR
#	Enable (disable) Postfix builds with the configuration file
#	$meta_directory/dynamicmaps.cf and dynamically-loadable
#	database plugins typically named postfix-*.so.*.  The setting
#	"dynamicmaps=yes" implicitly enables Postfix dynamically-linked
#	libraries.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBpie=yes\fR
# .IP \fBpie=no\fR
#
#	Enable (disable) Postfix builds with position-independent
#	executables, on platforms where this is supported.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fIinstallation_parameter\fB=\fIvalue\fR...
#	Override the compiled-in default value of the specified
#	installation parameter(s). The following parameters are
#	supported in this context:
#
#	command_directory config_directory daemon_directory
#	data_directory default_database_type html_directory
#	mail_spool_directory mailq_path manpage_directory meta_directory
#	newaliases_path queue_directory readme_directory sendmail_path
#	shlib_directory openssl_path
#
#	See the postconf(5) manpage for a description of these
#	parameters.
#
#	This feature was introduced with Postfix 3.0.
# .IP \fBWARN=\fIwarning_flags\fR
#	Specifies non-default gcc compiler warning options for use when
#	"make" is invoked in a source subdirectory only.
# LICENSE
# .ad
# .fi
#	The Secure Mailer license must be distributed with this software.
# AUTHOR(S)
#	Wietse Venema
#	IBM T.J. Watson Research
#	P.O. Box 704
#	Yorktown Heights, NY 10598, USA
#
#	Wietse Venema
#	Google, Inc.
#	111 8th Avenue
#	New York, NY 10011, USA
#--

# Emit system-dependent Makefile macro definitions to standard output.

echo "#----------------------------------------------------------------"
echo "# Start of summary of user-configurable 'make makefiles' options."
echo "# CCARGS=$CCARGS"
echo "# AUXLIBS=$AUXLIBS"
env | grep '^AUXLIBS_' | sed 's/^/# /'
echo "# shared=$shared"
echo "# dynamicmaps=$dynamicmaps"
echo "# pie=$pie"

# Defaults for most sane systems

RANLIB=ranlib
SYSLIBS=
AR=ar
ARFL=rv

# Ugly function to make our error message more visible among the
# garbage that is output by some versions of make(1).

# By now all shells must have functions.

error() {
   # Alas, tput(1) is not portable so we can't use visual effects.
   echo "ATTENTION:" 1>&2;
   echo "ATTENTION:" $* 1>&2;
   echo "ATTENTION:" 1>&2;
   exit 1
}

case $# in
 # Officially supported usage.
 0) SYSTEM=`(uname -s) 2>/dev/null`
    RELEASE=`(uname -r) 2>/dev/null`
    # No ${x%%y} support in Solaris 11 /bin/sh
    RELEASE_MAJOR=`expr "$RELEASE" : '\([0-9]*\)'` || exit 1
    VERSION=`(uname -v) 2>/dev/null`
    case "$VERSION" in
     dcosx*) SYSTEM=$VERSION;;
    esac;;
 # Unsupported debug-only mode. Not suitable for cross-platform tests.
 2) SYSTEM="$1"; RELEASE="$2";;
 *) echo usage: $0 [system release] 1>&2; exit 1;;
esac

case "$SYSTEM.$RELEASE" in
   SCO_SV.3.2)	SYSTYPE=SCO5
		# Use the native compiler by default
		: ${CC="/usr/bin/cc -b elf"}
		CCARGS="$CCARGS -DPIPES_CANT_FIONREAD $CCARGS"
		SYSLIBS="-lsocket -ldbm"
		RANLIB=echo
		;;
  UnixWare.5*)	SYSTYPE=UW7
		# Use the native compiler by default
		: ${CC=/usr/bin/cc}
		RANLIB=echo
		SYSLIBS="-lresolv -lsocket -lnsl"
		;;
  UNIX_SV.4.2*)	case "`uname -v`" in
	      2.1*) SYSTYPE=UW21
		    # Use the native compiler by default
		    : ${CC=/usr/bin/cc}
		    RANLIB=echo
		    SYSLIBS="-lresolv -lsocket -lnsl -lc -L/usr/ucblib -lucb"
		    ;;
	      *) error "Seems to be UnixWare`uname -v`. Untested.";;
		esac
		;;
  FreeBSD.2*)	SYSTYPE=FREEBSD2
		;;
  FreeBSD.3*)	SYSTYPE=FREEBSD3
		;;
  FreeBSD.4*)	SYSTYPE=FREEBSD4
		;;
  FreeBSD.5*)	SYSTYPE=FREEBSD5
		;;
  FreeBSD.6*)	SYSTYPE=FREEBSD6
		;;
  FreeBSD.7*)	SYSTYPE=FREEBSD7
		;;
  FreeBSD.8*)	SYSTYPE=FREEBSD8
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		;;
  FreeBSD.9*)	SYSTYPE=FREEBSD9
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		;;
  FreeBSD.10*)	SYSTYPE=FREEBSD10
		: ${CC=cc}
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC} -shared"}
		;;
 DragonFly.*)	SYSTYPE=DRAGONFLY
		;;
  OpenBSD.2*)	SYSTYPE=OPENBSD2
		;;
  OpenBSD.3*)	SYSTYPE=OPENBSD3
		;;
  OpenBSD.4*)	SYSTYPE=OPENBSD4
		;;
  OpenBSD.5*)	SYSTYPE=OPENBSD5
		: ${CC=cc}
		: ${SHLIB_SUFFIX=.so.1.0}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC} -shared"}
		;;
  OpenBSD.6*)	SYSTYPE=OPENBSD6
		: ${CC=cc}
		: ${SHLIB_SUFFIX=.so.1.0}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC} -shared"}
		;;
  ekkoBSD.1*)	SYSTYPE=EKKOBSD1
		;;
   NetBSD.1*)	SYSTYPE=NETBSD1
		;;
   NetBSD.2*)	SYSTYPE=NETBSD2
		;;
   NetBSD.3*)	SYSTYPE=NETBSD3
		;;
   NetBSD.4*)	SYSTYPE=NETBSD4
		;;
   NetBSD.5*)	SYSTYPE=NETBSD5
		;;
   NetBSD.6*)	SYSTYPE=NETBSD6
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
               ;;
   NetBSD.7*)  SYSTYPE=NETBSD7
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		;;
   BSD/OS.2*)	SYSTYPE=BSDI2
		;;
   BSD/OS.3*)	SYSTYPE=BSDI3
		;;
   BSD/OS.4*)	SYSTYPE=BSDI4
		;;
 OSF1.V[3-5].*)	SYSTYPE=OSF1
		# Use the native compiler by default
		: ${CC=cc}
		: ${DEBUG="-g3"}
		case $RELEASE in
		V[0-4].*) CCARGS="$CCARGS -DNO_IPV6";;
		esac
		;;
    SunOS.4*)	SYSTYPE=SUNOS4
		SYSLIBS=-lresolv
		;;
    SunOS.5*)	SYSTYPE=SUNOS5
		RANLIB=echo
		SYSLIBS="-lresolv -lsocket -lnsl -ldl"
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-h,${LIB}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${SHLIB_RPATH='-Wl,-R,${SHLIB_DIR}'}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		# Stock awk breaks with >10 files.
		test -x /usr/xpg4/bin/awk && AWK=/usr/xpg4/bin/awk
		# Solaris 2.5 added usleep(), POSIX regexp, POSIX getpwnam/uid_r
		case $RELEASE in
		    5.[0-4]) CCARGS="$CCARGS -DMISSING_USLEEP -DNO_POSIX_REGEXP -DNO_POSIX_GETPW_R";;
		esac
		# Solaris 2.6 added snprintf()
		case $RELEASE in
		    5.[0-5]) CCARGS="$CCARGS -DNO_SNPRINTF";;
		esac
		# Solaris 8 added IPv6 and /dev/poll
		case $RELEASE in
		    5.[0-7]|5.[0-7].*) CCARGS="$CCARGS -DNO_IPV6 -DNO_DEVPOLL";;
		esac
		# Solaris 9 added closefrom(), futimesat() and /dev/*random
		# and appears to have solid UNIX-domain sockets.
		case $RELEASE in
		    5.[0-8]|5.[0-8].*) CCARGS="$CCARGS -DNO_CLOSEFROM -DNO_DEV_URANDOM -DNO_FUTIMESAT -DSTREAM_CONNECTIONS";;
		esac
		# Solaris 10 added setenv(), unsetenv().
		case $RELEASE in
		    5.[0-9]|5.[0-9].*) CCARGS="$CCARGS -DMISSING_SETENV";;
		esac
		# NISPLUS was removed after Solaris 10.
		case $RELEASE in
		    5.[0-9][0-9]*) CCARGS="$CCARGS -DNO_NISPLUS";;
		esac
		# Work around broken str*casecmp(). Do it all here instead
		# of having half the solution in the sys_defs.h file.
		CCARGS="$CCARGS -Dstrcasecmp=fix_strcasecmp \
		    -Dstrncasecmp=fix_strncasecmp"
		STRCASE="strcasecmp.o"
		# Avoid common types of braindamage
		case "$LD_LIBRARY_PATH" in
		?*) error "Don't set LD_LIBRARY_PATH";;
		esac
		case "${CC}" in
		*" "*) ;;
		*ucb*) error "Don't use /usr/ucb/cc or ucblib";;
		  cc*) case `which ${CC}` in
		*ucb*) error "Don't use /usr/ucb/cc or ucblib";;
		  esac;;
		esac
		;;
   ULTRIX.4*)	SYSTYPE=ULTRIX4
		if [ -f /usr/local/lib/libdb.a ]; then
		    SYSLIBS="$SYSLIBS -ldb"
		    CCARGS="$CCARGS -DHAS_DB"
		    if [ -d /usr/local/include/db ]; then
			CCARGS="$CCARGS -I/usr/local/include/db"
		    fi
		fi
		for l in syslog resolv; do
		    if [ -f /usr/local/lib/lib$l.a ]; then
			SYSLIBS="$SYSLIBS -l$l"
		    fi
		done
		;;
       AIX.*)	case "`uname -v`" in
		6)	SYSTYPE=AIX6
			CCARGS="$CCARGS -DNO_DNSSEC"
			case "$CC" in
			cc|*/cc|xlc|*/xlc) CCARGS="$CCARGS -w -blibpath:/usr/lib:/lib:/usr/local/lib";;
			esac
			CCARGS="$CCARGS -D_ALL_SOURCE -DHAS_POSIX_REGEXP"
			;;
		5)	SYSTYPE=AIX5
			CCARGS="$CCARGS -DNO_DNSSEC"
			case "$CC" in
			cc|*/cc|xlc|*/xlc) CCARGS="$CCARGS -w -blibpath:/usr/lib:/lib:/usr/local/lib";;
			esac
			CCARGS="$CCARGS -D_ALL_SOURCE -DHAS_POSIX_REGEXP"
			;;
		4)	SYSTYPE=AIX4
			CCARGS="$CCARGS -DNO_DNSSEC"
			# How embarrassing...
			case "$CC" in
			cc|*/cc|xlc|*/xlc) OPT=; CCARGS="$CCARGS -w -blibpath:/usr/lib:/lib:/usr/local/lib";;
			esac
			CCARGS="$CCARGS -D_ALL_SOURCE -DHAS_POSIX_REGEXP"
			;;
		3)	SYSTYPE=AIX3
			CCARGS="$CCARGS -DNO_DNSSEC"
			# How embarrassing...
			case "$CC" in
			cc|*/cc|xlc|*/xlc) OPT=; CCARGS="$CCARGS -w";;
			esac
			CCARGS="$CCARGS -D_ALL_SOURCE"
			;;
		*)	error "Unknown AIX version: `uname -v`.";;
		esac;;
		# Tested with RedHat 3.03 on 20020729.
    Linux.1*)	SYSTYPE=LINUX1
		case "$CCARGS" in
		 *-DNO_DB*) ;;
		 *-DHAS_DB*) ;;
		 *) SYSLIBS="-ldb";;
		esac
		;;
    Linux.2*)	SYSTYPE=LINUX2
		case "$CCARGS" in
		 *-DNO_DB*) ;;
		 *-DHAS_DB*) ;;
		 *) if [ -f /usr/include/db.h ]
		    then
			: we are all set
		    elif [ -f /usr/include/db/db.h ]
		    then
			CCARGS="$CCARGS -I/usr/include/db"
		    else
			# No, we're not going to try db1 db2 db3 etc.
			# On a properly installed system, Postfix builds
			# by including <db.h> and by linking with -ldb
			echo "No <db.h> include file found." 1>&2
			echo "Install the appropriate db*-devel package first." 1>&2
			exit 1
		    fi
		    SYSLIBS="-ldb"
		    ;;
		esac
		for name in nsl resolv $GDBM_LIBS
		do
		    for lib in /usr/lib64 /lib64 /usr/lib /lib
		    do
			test -e $lib/lib$name.a -o -e $lib/lib$name.so && {
			    SYSLIBS="$SYSLIBS -l$name"
			    break
			}
		    done
		done
		# Kernel 2.4 added IPv6
		case "$RELEASE" in
		2.[0-3].*) CCARGS="$CCARGS -DNO_IPV6";;
		esac
		# Kernel 2.6 added EPOLL
		case "$RELEASE" in
		2.[0-5].*) CCARGS="$CCARGS -DNO_EPOLL";;
		    # Workaround for retarded libc 
		    2.6.*)
		       if [ `expr "X$CCARGS" : "X.*-DNO_EPOLL"` -gt 0 ]
		       then
			   :
		       elif [ ! -e /usr/include/sys/epoll.h ]
		       then
			   echo CCARGS="$CCARGS -DNO_EPOLL"
		       else
			   trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
			   cat >makedefs.test.c <<'EOF'
#include <sys/types.h>
#include <sys/epoll.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>

int     main(int argc, char **argv)
{
    int     epoll_handle;

    if ((epoll_handle = epoll_create(1)) < 0) {
	perror("epoll_create");
	exit(1);
    }
    exit(0);
}
EOF
			   ${CC-gcc} -o makedefs.test makedefs.test.c || exit 1
			   ./makedefs.test 2>/dev/null ||
				CCARGS="$CCARGS -DNO_EPOLL"
			   rm -f makedefs.test makedefs.test.[co]
		       fi;;
		esac
		SYSLIBS="$SYSLIBS -ldl"
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,--enable-new-dtags -Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		;;
  Linux.[34].*)	SYSTYPE=LINUX$RELEASE_MAJOR
		case "$CCARGS" in
		 *-DNO_DB*) ;;
		 *-DHAS_DB*) ;;
		 *) if [ -f /usr/include/db.h ]
		    then
			: we are all set
		    elif [ -f /usr/include/db/db.h ]
		    then
			CCARGS="$CCARGS -I/usr/include/db"
		    else
			# On a properly installed system, Postfix builds
			# by including <db.h> and by linking with -ldb
			echo "No <db.h> include file found." 1>&2
			echo "Install the appropriate db*-devel package first." 1>&2
			exit 1
		    fi
		    SYSLIBS="-ldb"
		    ;;
		esac
		for name in nsl resolv
		do
		    for lib in /usr/lib64 /lib64 /usr/lib /usr/lib/* /lib /lib/*
		    do
			test -e $lib/lib$name.a -o -e $lib/lib$name.so && {
			    SYSLIBS="$SYSLIBS -l$name"
			    break
			}
		    done
		done
		SYSLIBS="$SYSLIBS -ldl"
		: ${SHLIB_SUFFIX=.so}
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_LD="${CC-gcc} -shared"' -Wl,-soname,${LIB}'}
		: ${SHLIB_RPATH='-Wl,--enable-new-dtags -Wl,-rpath,${SHLIB_DIR}'}
		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
		: ${PLUGIN_LD="${CC-gcc} -shared"}
		;;
     GNU.0*|GNU/kFreeBSD.[567]*)
		SYSTYPE=GNU0
		case "$CCARGS" in
		 *-DNO_DB*) ;;
		 *) if [ -f /usr/include/db.h ]
		    then
			: we are all set
		    elif [ -f /usr/include/db/db.h ]
		    then
			CCARGS="$CCARGS -I/usr/include/db"
		    else
			# On a properly installed system, Postfix builds
			# by including <db.h> and by linking with -ldb
			echo "No <db.h> include file found." 1>&2
			echo "Install the appropriate db*-devel package first." 1>&2
			exit 1
		    fi
		    SYSLIBS="-ldb"
		    ;;
		esac
		for name in nsl resolv
		do
		    for lib in /usr/lib64 /lib64 /usr/lib /lib
		    do
			test -e $lib/lib$name.a -o -e $lib/lib$name.so && {
			    SYSLIBS="$SYSLIBS -l$name"
			    break
			}
		    done
		done
		case "`uname -s`" in
		GNU)
			# currently no IPv6 support on Hurd
			CCARGS="$CCARGS -DNO_IPV6"
			;;
		esac
		;;
     IRIX*.5.*)	SYSTYPE=IRIX5
		# Use the native compiler by default
		: ${CC=cc} ${DEBUG="-g3"}
		RANLIB=echo
		;;
     IRIX*.6.*)	SYSTYPE=IRIX6
		# Use the native compiler by default, and allow nested comments.
		: ${CC="cc -woff 1009,1116,1412"}
		RANLIB=echo
		;;
HP-UX.A.09.*)	SYSTYPE=HPUX9
		SYSLIBS=-ldbm
		CCARGS="$CCARGS -DMISSING_USLEEP -DNO_SNPRINTF"
		if [ -f /usr/lib/libdb.a ]; then
		    CCARGS="$CCARGS -DHAS_DB"
		    SYSLIBS="$SYSLIBS -ldb"
		fi
		;;
HP-UX.B.10.*)	SYSTYPE=HPUX10
		CCARGS="$CCARGS `nm /usr/lib/libc.a 2>/dev/null |
		    (grep usleep >/dev/null || echo '-DMISSING_USLEEP')`"
		CCARGS="$CCARGS -DNO_SNPRINTF"
		if [ -f /usr/lib/libdb.a ]; then
		    CCARGS="$CCARGS -DHAS_DB"
		    SYSLIBS=-ldb
		fi
		;;
HP-UX.B.11.*)	SYSTYPE=HPUX11
		SYSLIBS=-lnsl
		if [ -f /usr/lib/libdb.a ]; then
		    CCARGS="$CCARGS -DHAS_DB"
		    SYSLIBS="$SYSLIBS -ldb"
		fi
		;;
ReliantUNIX-?.5.43) SYSTYPE=ReliantUnix543
		RANLIB=echo
		SYSLIBS="-lresolv -lsocket -lnsl"
		;;
    Darwin.*)   SYSTYPE=MACOSX
		# Use the native compiler by default
		: ${CC=cc}
		CCARGS="$CCARGS"
		# Darwin > 1.3 uses awk and flat_namespace
		case $RELEASE in
		 1.[0-3]) AWK=gawk;;
		       *) AWK=awk
			  SYSLIBS="$SYSLIBS -flat_namespace";;
		esac
		# Darwin 7 adds IPv6 support, BIND_8_COMPAT, NO_NETINFO
		case $RELEASE in
		 [1-6].*) CCARGS="$CCARGS -DNO_IPV6";;
		       *) CCARGS="$CCARGS -DBIND_8_COMPAT -DNO_NETINFO";;
		esac
		# Darwin 9.0 (MacOS X 10.5) adds POSIX getpwnam_r/getpwuid_r
		case $RELEASE in
		 [1-8].*) CCARGS="$CCARGS -DNO_POSIX_GETPW_R";;
		esac
		# Darwin 10.3.0 no longer has <nameser8_compat.h>.
		case $RELEASE in
		     ?.*) CCARGS="$CCARGS -DRESOLVE_H_NEEDS_NAMESER8_COMPAT_H";;
		       *) CCARGS="$CCARGS -DRESOLVE_H_NEEDS_ARPA_NAMESER_COMPAT_H";;
		esac
		# Darwin 11.x (MacOS X 10.7.x), maybe earlier, needs libresolv.
		case $RELEASE in
		?.*|10.*) ;;
		       *) SYSLIBS="$SYSLIBS -lresolv";;
		esac
		# kqueue and/or poll are broken in MacOS X 10.5 (Darwin 9).
		# kqueue works in Mac OS X 10.8 (Darwin 12).
		case $RELEASE in
	    ?.*|1[0-1].*) CCARGS="$CCARGS -DNO_KQUEUE";;
		esac
		: ${SHLIB_CFLAGS=-fPIC}
		: ${SHLIB_SUFFIX=.dylib}
		: ${SHLIB_LD='cc -shared -Wl,-flat_namespace -Wl,-undefined,dynamic_lookup -Wl,-install_name,@rpath/${LIB}'}
		: ${SHLIB_RPATH='-Wl,-rpath,${SHLIB_DIR}'}
                # In MacOS/X 10.11.x /bin/sh unsets DYLD_LIBRARY_PATH, so we
                # have export it into postfix-install indirectly!
		: ${SHLIB_ENV="DYLD_LIBRARY_PATH=`pwd`/lib SHLIB_ENV_VAR=DYLD_LIBRARY_PATH SHLIB_ENV_VAL=`pwd`/lib"}
		: ${PLUGIN_LD='cc -shared -Wl,-flat_namespace -Wl,-undefined,dynamic_lookup'}
		;;
    dcosx.1*)	SYSTYPE=DCOSX1
		RANLIB=echo
		SYSLIBS="-lresolv -lsocket -lnsl -lc -lrpcsvc -L/usr/ucblib -lucb"
		;;

	 ".")	if [ -d /NextApps ]; then
		    SYSTYPE=`hostinfo | sed -n \
			's/^.*NeXT Mach 3.*$/NEXTSTEP3/;/NEXTSTEP3/{p;q;}'`
		    if [ "$SYSTYPE" = "" ]; then
			SYSTYPE=`hostinfo | sed -n \
			    's/^.*NeXT Mach 4.*$/OPENSTEP4/;/OPENSTEP4/{p;q;}'`
		    fi
		    : ${CC=cc}
		    RANLIB="sleep 5; ranlib"
		else
		    error "Unable to determine your system type."
		fi
		;;
	   *)	error "Unknown system type: $SYSTEM $RELEASE";;
esac

#
# sigsetjmp()/siglongjmp() can be "better" than setjmp()/longjmp()
# if used wisely (that is: almost never, just like signals).
# Unfortunately some implementations have been buggy in the past.
#
case "$CCARGS" in
 *-DNO_SIGSETJMP*) ;;
		*) trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
		   cat >makedefs.test.c <<'EOF'
#include <setjmp.h>
#include <stdlib.h>
#include <stdio.h>

static int count = 0;

int     main(int argc, char **argv)
{
    sigjmp_buf env;
    int     retval;

    switch (retval = sigsetjmp(env, 1)) {
    case 0:
	siglongjmp(env, 12345);
    case 12345:
	break;
    default:
	fprintf(stderr, "Error: siglongjmp ignores second argument\n");
	exit(1);
    }

    switch (retval = sigsetjmp(env, 1)) {
    case 0:
	if (count++ > 0) {
	    fprintf(stderr, "Error: not overriding siglongjmp(env, 0)\n");
	    exit(1);
	}
	siglongjmp(env, 0);
    case 1:
	break;
    default:
	fprintf(stderr, "Error: overriding siglongjmp(env, 0) with %d\n",
		retval);
	exit(1);
    }
    exit(0);
}
EOF
		   ${CC-gcc} -o makedefs.test makedefs.test.c || exit 1
		   ./makedefs.test 2>/dev/null ||
			CCARGS="$CCARGS -DNO_SIGSETJMP"
		   rm -f makedefs.test makedefs.test.[co]
esac

#
# Look for the ICU library and enable unicode email if available.
#
case "$CCARGS" in
*-DNO_EAI*) CCARGS="$CCARGS "'-DDEF_SMTPUTF8_ENABLE=\"no\"';;
	 *) icu_cppflags=`(icu-config --cppflags) 2>/dev/null` && {
		icu_ldflags=`(icu-config --ldflags) 2>/dev/null` && {
		    trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
		    cat >makedefs.test.c <<'EOF'
#include <unicode/uidna.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
    char    buf[1024];
    UErrorCode error = U_ZERO_ERROR;
    UIDNAInfo info = UIDNA_INFO_INITIALIZER;
    UIDNA  *idna = uidna_openUTS46(UIDNA_DEFAULT, &error);

    exit(uidna_labelToUnicodeUTF8(idna,
				  "xn--lgbbat1ad8j",	/* an arabic TLD */
				  15,
				  buf,
				  sizeof(buf),
				  &info,
				  &error) != 14);
}
EOF
		    ${CC-gcc} -o makedefs.test makedefs.test.c $icu_cppflags \
			$icu_ldflags >/dev/null 2>&1
		    if ./makedefs.test 2>/dev/null ; then
			CCARGS="$CCARGS $icu_cppflags"
			SYSLIBS="$SYSLIBS $icu_ldflags"
		    else
			CCARGS="$CCARGS -DNO_EAI"
		    fi
		    rm -f makedefs.test makedefs.test.[co]
		}
	    } || CCARGS="$CCARGS -DNO_EAI"' -DDEF_SMTPUTF8_ENABLE=\"no\"'
esac

#
# OpenSSL has no configuration query utility, but we don't try to
# guess. We assume includes in /usr/include/openssl and libraries in
# /usr/lib, or in their /usr/local equivalents. If the OpenSSL files
# are in a non-standard place, their locations need to be specified.
#
#case "$CCARGS" in
# *-DUSE_TLS*)	;;
#  *-DNO_TLS*)	;;
#           *)	CCARGS="$CCARGS -DUSE_TLS"
#		AUXLIBS="$AUXLIBS -lssl -lcrypto"
#		;;
#esac

#
# We don't know all systems that have /dev/urandom, so we probe.
#
test -r /dev/urandom && CCARGS="$CCARGS -DHAS_DEV_URANDOM"

#
# PCRE 3.x has a pcre-config utility so we don't have to guess.
#
case "$CCARGS" in
*-DHAS_PCRE*)	;;
 *-DNO_PCRE*)	;;
	   *)	pcre_cflags=`(pcre-config --cflags) 2>/dev/null` &&
		    pcre_libs=`(pcre-config --libs) 2>/dev/null` && {
			CCARGS="$CCARGS -DHAS_PCRE $pcre_cflags"
			AUXLIBS_PCRE="$pcre_libs"
		}
		;;
esac

# Defaults that can be overruled (make makefiles CC=cc OPT=-O6 DEBUG=)
# Disable optimizations by default when compiling for Purify. Disable
# optimizations by default with gcc 2.8, until the compiler is known to
# be OK. Those who dare can still overrule this (make makefiles OPT=-O).

case "$CC" in
 *purify*) : ${OPT=};;
*/gcc|gcc) case `$CC -v` in
	   "gcc version 2.8"*) : ${OPT=};;
	   esac;;
      *CC) error "Don't use CC. That's the C++ compiler";;
	*) : ${OPT='-O'};;
esac

# Snapshot only.
#CCARGS="$CCARGS -DSNAPSHOT"

# Non-production: needs thorough testing, or major changes are still
# needed before the code stabilizes.
#CCARGS="$CCARGS -DNONPROD"

# Workaround: prepend Postfix include files before other include files.
CCARGS="-I. -I../../include $CCARGS"

# Portability and usability considerations.
#
# In an ideal world we would be able to provide the option to say
# "make makefiles shlib_directory=/some/where/'$mail_version'".  This
# would allow a running system to be upggraded without worries about
# tempororary program-library ABI incompatibilities (the Postfix
# library API changes incompatibly from one version to the next).
#
# Unfortunately, gmake performs macro expansion on values in name=value
# command-line arguments. In the specific example above, gmake would
# eat up the "$" and "m" before it even invokes makedefs, and it
# ould replace "'${mail_version}'" and "'$(mail_version)'" with
# nothing.
#
# Requiring people to specify $$ is not a good option. Instead we
# replace the string MAIL_VERSION at the end of parameter values in
# "make makefiles name=value...". The replacement depends on usage
# context: the expanded release version in actual pathnames, or the
# unexpanded ${mail_version} in configuration parameter values (both
# main.cf and and built-in defaults).

# Helper function to determine DEF_MAIL_VERSION.

def_mail_version()
{
    trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
    cat > makedefs.test.c <<'EOF'
#include <stdlib.h>
#include <stdio.h>
EOF
        # Avoid "nested comment" warnings. Top-of-file comments start in
        # column 1 and have no code after "*/", not even in header files.
        # If this is insufficient, kill the problem with #ifndef MAKEDEFS.
        sed '/^\/\*/,/\*\//d' src/global/mail_version.h >>makedefs.test.c
        cat >>makedefs.test.c <<EOF
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int     main(void)
{
    printf("%s\n", DEF_MAIL_VERSION);
    fflush(stdout);
    exit(ferror(stdout) ? 1 : 0);
}
EOF
    eval ${CC-gcc} ${CCARGS} -o makedefs.test makedefs.test.c || exit 1
    ./makedefs.test || exit 1
    rm -f makedefs.test makedefs.test.[co]
}

# Helper to expand MAIL_VERSION at the end of a command-line parameter value.

# Note that MAIL_VERSION) does not anchor the match at the end.

process_input_parameter()
{
    echo "#" $parm_name=$parm_val
    case "$parm_val" in
    *MAIL_VERSION*)
	cparm_val=`echo "$parm_val" | \
	    sed 's/MAIL_VERSION$/\\\\$${mail_version}/g'`|| exit 1
	case "$mail_version" in
	"") mail_version=`def_mail_version` || exit 1
	esac
	parm_val=`echo "$parm_val" | sed 's/MAIL_VERSION$/'"$mail_version/g"` ||
	    exit 1
	case "$parm_val" in
	*MAIL_VERSION*)
	    error "MAIL_VERSION not at end of parameter value: $parm_val"
	esac
	eval ${parm_name}=\""\$parm_val"\";;
     *) cparm_val="$parm_val";;
    esac
    CCARGS="$CCARGS -D$parm_macro=\\\"$cparm_val\\\""
}

# Optionally override installation-parameter default settings.

command_directory_macro=DEF_COMMAND_DIR
config_directory_macro=DEF_CONFIG_DIR
daemon_directory_macro=DEF_DAEMON_DIR
data_directory_macro=DEF_DATA_DIR
mail_spool_directory_macro=DEF_MAIL_SPOOL_DIR
mailq_path_macro=DEF_MAILQ_PATH
meta_directory_macro=DEF_META_DIR
newaliases_path_macro=DEF_NEWALIAS_PATH
queue_directory_macro=DEF_QUEUE_DIR
sendmail_path_macro=DEF_SENDMAIL_PATH
shlib_directory_macro=DEF_SHLIB_DIR
openssl_path_macro=DEF_OPENSSL_PATH

# shlib_directory is checked here because "no" is not a good answer.
# Instead, build with "dynamicmaps=no" and "shared=no" as appropriate.

for parm_name in command_directory config_directory daemon_directory \
	data_directory mail_spool_directory mailq_path meta_directory \
	newaliases_path queue_directory sendmail_path shlib_directory \
	openssl_path
do
    eval parm_val=\"\$$parm_name\"
    eval parm_macro=\"\$${parm_name}_macro\"
    case "$parm_val" in
    "") ;;
    /*) process_input_parameter;;
     *) error "$parm_name must specify an absolute path name";;
    esac
done

html_directory_macro=DEF_HTML_DIR
manpage_directory_macro=DEF_MANPAGE_DIR
readme_directory_macro=DEF_README_DIR

for parm_name in html_directory manpage_directory readme_directory
do
    eval parm_val=\"\$$parm_name\"
    eval parm_macro=\"\$${parm_name}_macro\"
    case "$parm_val" in
    "") ;;
 /*|no) process_input_parameter;;
     *) error "$parm_name must specify \"no\" or an absolute path name";;
    esac
done

default_database_type_macro=DEF_DB_TYPE

for parm_name in default_database_type
do
    eval parm_val=\"\$$parm_name\"
    eval parm_macro=\"\$${parm_name}_macro\"
    case "$parm_val" in
    "") ;;
     *) process_input_parameter;;
    esac
done

echo "# End of summary of user-configurable 'make makefiles' options."
echo "#--------------------------------------------------------------"

# The following are for non-shared libsasl and libmilter builds.

_AR=$AR
_RANLIB=$RANLIB

# Choose between dynamic and static library builds.

case "$dynamicmaps" in
  yes) shared=yes;;
""|no) ;;
    *) error "Specify \"dynamicmaps=yes\" or \"dynamicmaps=no\"";;
esac

case "$shared" in
yes)
    if [ -z "$SHLIB_SUFFIX" ]
    then 
	error "Shared libraries are requested, but not supported on this platform"
    fi
    AR=:
    RANLIB=:
    CCARGS="$CCARGS -DUSE_DYNAMIC_LIBS"
    case "$dynamicmaps" in
    yes) NON_PLUGIN_MAP_OBJ=
	 PLUGIN_MAP_OBJ='$(MAP_OBJ)'
	 PLUGIN_MAP_OBJ_UPDATE=plugin_map_obj_update
	 PLUGIN_MAP_SO_MAKE=plugin_map_so_make
	 PLUGIN_MAP_SO_UPDATE=plugin_map_so_update
	 CCARGS="$CCARGS -DUSE_DYNAMIC_MAPS"
	 ;;
      *) NON_PLUGIN_MAP_OBJ='$(MAP_OBJ)'
	 PLUGIN_MAP_OBJ=
	 PLUGIN_MAP_OBJ_UPDATE=
	 PLUGIN_MAP_SO_MAKE=
	 PLUGIN_MAP_SO_UPDATE=
	 PLUGIN_LD=
	 CCARGS="$CCARGS -UUSE_DYNAMIC_MAPS"
	 ;;
    esac

    # Determine the dynamically-linked library and plugin installation
    # directory.

    parm_name=shlib_directory
    eval parm_val=\"\$$parm_name\"
    eval parm_macro=\"\$${parm_name}_macro\"
    case "$parm_val" in
    /*|no) # CCARGS was already updated above.
	;;
    "") trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
	sed -n '
	    /_SHLIB_DIR/,/^$/p
	' src/global/mail_params.h >makedefs.test.c
	cat >>makedefs.test.c <<EOF
#include <stdlib.h>
#include <stdio.h>
int     main(void)
{
    printf("%s\n", $parm_macro);
    fflush(stdout);
    exit(ferror(stdout) ? 1 : 0);
}
EOF
	eval ${CC-gcc} ${CCARGS} -o makedefs.test makedefs.test.c || exit 1
	parm_val=`./makedefs.test` || exit 1
	rm -f makedefs.test makedefs.test.[co]
	eval ${parm_name}=\""\$parm_val"\"
	#CCARGS="$CCARGS -D$parm_macro=\\\"$parm_val\\\""
	;;
     *) # this parameter was already checked above.
	error "Can't happen in $0 - $parm_val is not an absolute path"
	;;
    esac

    LIB_PREFIX=postfix-
    LIB_SUFFIX=${SHLIB_SUFFIX}
    ;;

no|"")
    shlib_directory=no
    CCARGS="$CCARGS -UUSE_DYNAMIC_LIBS -DDEF_SHLIB_DIR=\\\"no\\\""
    CCARGS="$CCARGS -UUSE_DYNAMIC_MAPS"
    SHLIB_CFLAGS=
    SHLIB_SUFFIX=
    SHLIB_LD=:
    SHLIB_SYSLIBS=
    SHLIB_RPATH=
    SHLIB_ENV=
    LIB_PREFIX=
    LIB_SUFFIX=.a
    NON_PLUGIN_MAP_OBJ='$(MAP_OBJ)'
    PLUGIN_MAP_OBJ=
    PLUGIN_MAP_OBJ_UPDATE=
    PLUGIN_MAP_SO_MAKE=
    PLUGIN_MAP_SO_UPDATE=
    PLUGIN_LD=
    ;;

*)  error "Specify \"shared=yes\" or \"shared=no\""
    ;;
esac

# "gcc -W" 3.4.2 no longer reports functions that fail to return a
# result.  Use "gcc -Wall -Wno-comment" instead. We'll figure out
# later if the other -Wmumble options are really redundant. Having
# een burned once by a compiler that lies about what warnings it
# produces, not taking that chance again.

: ${CC=gcc} ${OPT='-O'} ${DEBUG='-g'} ${AWK=awk} \
${WARN='-Wall -Wno-comment -Wformat -Wimplicit -Wmissing-prototypes \
	-Wparentheses -Wstrict-prototypes -Wswitch -Wuninitialized \
	-Wunused -Wno-missing-braces'}

# Extract map type names from -DHAS_XXX compiler options.  We avoid
# problems with tr(1) range syntax by using enumerations instead,
# and we don't try to figure out which awk versions have tolower().
# The following was validated in 2014 on FreeBSD/Linux and Solaris 9.

DEFINED_MAP_TYPES=`
    echo $CCARGS | tr -cd '\- _ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' | 
	tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | ${AWK} '
	{ for (n = 1; n <= NF; n++)
	      if ($n ~ /^-dhas_/)
		  if (seen[name = substr($n, 7)]++ == 0)
		      printf(" %s", name) }
'`

# Propagate AUXLIBS_FOO or merge them into global AUXLIBS (i.e. SYSLIBS).

PLUGGABLE_MAPS="CDB LDAP LMDB MYSQL PCRE PGSQL SDBM SQLITE"

case "$dynamicmaps" in
yes) for name in $PLUGGABLE_MAPS
     do
	 eval test -n "\"\$AUXLIBS_$name\"" && 
	     eval PLUGIN_AUXLIBS="\"\$PLUGIN_AUXLIBS
AUXLIBS_$name = \$AUXLIBS_$name\""
     done;;
  *) for name in $PLUGGABLE_MAPS
     do
	 eval AUXLIBS="\"\$AUXLIBS \$AUXLIBS_$name\""
     done;;
esac

# Remove static libraries from SYSLIBS when building shared objects,
# Can't use the shell "case" patterns to detect names ending in *.a.

case "$shared" in
yes) SHLIB_SYSLIBS=`${AWK} '
     BEGIN { wc = split("'"$AUXLIBS $SYSLIBS"'", words) 
	 for (n = 1; n <= wc; n++)
	     if (words[n] !~ /\.a$/)
		 printf(" %s", words[n])
     }
     '`
esac

# Choose between PIE and non-PIE builds.

case "$pie" in
  yes) case "$shared" in
        yes) CCARGS_PIE="-fPIC";;
          *) CCARGS_PIE="-fPIE";;
       esac
       case " $CCARGS " in
         *" $CCARGS_PIE "*) CCARGS_PIE=;;
       esac
       SYSLIBS_PIE="-pie";;
""|no) ;;
    *) error "Specify \"pie=yes\" or \"pie=no\"";;
esac

# Don't permit random overrides.
allowed_user_install_opts="-keep-build-mtime"
for opt in $POSTFIX_INSTALL_OPTS
do
    (for allowed in -keep-build-mtime
    do
	test "$opt" = "$allowed" && exit 0
    done; exit 1) || error "invalid option '$opt' in POSTFIX_INSTALL_OPTS"
done

# Finally...

sed 's/   */ /g' <<EOF
# System-dependent settings and compiler/linker overrides.
SYSTYPE	= $SYSTYPE
_AR	= $_AR
ARFL	= $ARFL
_RANLIB	= $_RANLIB
SYSLIBS	= $SYSLIBS_PIE $AUXLIBS $SYSLIBS $PLUGIN_AUXLIBS
CC	= $CC $CCARGS_PIE $CCARGS \$(WARN)
OPT	= $OPT
DEBUG	= $DEBUG
AWK	= $AWK
STRCASE = $STRCASE
EXPORT	= CCARGS='$CCARGS' OPT='$OPT' DEBUG='$DEBUG'
WARN	= $WARN
DEFINED_MAP_TYPES = $DEFINED_MAP_TYPES
MAKE_FIX = $MAKE_FIX
# Switch between Postfix static and dynamically-linked libraries.
AR	= $AR
RANLIB	= $RANLIB
LIB_PREFIX = $LIB_PREFIX
LIB_SUFFIX = $LIB_SUFFIX
SHLIB_CFLAGS = $SHLIB_CFLAGS
SHLIB_DIR = $shlib_directory
SHLIB_ENV = $SHLIB_ENV
SHLIB_LD = $SHLIB_LD
SHLIB_SYSLIBS = $SHLIB_SYSLIBS
SHLIB_RPATH = $SHLIB_RPATH
# Switch between dynamicmaps.cf plugins and hard-linked databases.
NON_PLUGIN_MAP_OBJ = $NON_PLUGIN_MAP_OBJ
PLUGIN_MAP_OBJ = $PLUGIN_MAP_OBJ
PLUGIN_MAP_OBJ_UPDATE = $PLUGIN_MAP_OBJ_UPDATE
PLUGIN_MAP_SO_MAKE = $PLUGIN_MAP_SO_MAKE
PLUGIN_MAP_SO_UPDATE = $PLUGIN_MAP_SO_UPDATE
PLUGIN_LD = $PLUGIN_LD
POSTFIX_INSTALL_OPTS = $POSTFIX_INSTALL_OPTS
# Application-specific rules.
EOF