xref: /src/external/ibm-public/postfix/dist/makedefs

#!/bin/sh

#++
# NAME
#	makedefs 1
# SUMMARY
#	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.
#
#	Default settings can be overruled by specifying them as
#	environment variables. Use quotes if variables contain
#	whitespace or shell meta characters.
# .IP \fBAUXLIBS=\fIobject_library...\fR
#	Specifies one or more non-default object libraries.
# .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_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_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.
# .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 and 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.
# .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 \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
#--

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

# 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 $# in
 # Officially supported usage.
 0) SYSTEM=`(uname -s) 2>/dev/null`
    RELEASE=`(uname -r) 2>/dev/null`
    VERSION=`(uname -v) 2>/dev/null`
    case "$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
		;;
  FreeBSD.9*)	SYSTYPE=FREEBSD9
		;;
  OpenBSD.2*)	SYSTYPE=OPENBSD2
		;;
  OpenBSD.3*)	SYSTYPE=OPENBSD3
		;;
  OpenBSD.4*)	SYSTYPE=OPENBSD4
		;;
  OpenBSD.5*)	SYSTYPE=OPENBSD5
		;;
  ekkoBSD.1*)	SYSTYPE=EKKOBSD1
		;;
   NetBSD.1*)	SYSTYPE=NETBSD1
		;;
   NetBSD.2*)	SYSTYPE=NETBSD2
		;;
   NetBSD.3*)	SYSTYPE=NETBSD3
		;;
   NetBSD.4*)	SYSTYPE=NETBSD4
		;;
   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"
		# 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 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
		# 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$l"
		    fi
		done
		;;
       AIX.*)	case "`uname -v`" in
		6)	SYSTYPE=AIX6
			case "$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
			case "$CC" in
			cc|*/cc|xlc|*/xlc) CCARGS="$CCARGS -w -blibpath:/usr/lib:/lib:/usr/local/lib";;
			esac
			CCARGS="$CCARGS -D_ALL_SOURCE -DHAS_POSIX_REGEXP"
			;;
		4)	SYSTYPE=AIX4
			# How embarrassing...
			case "$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
			# 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*) ;;
		 *) SYSLIBS="-ldb";;
		esac
		;;
    Linux.2*)	SYSTYPE=LINUX2
		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
			# 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
		;;
    Linux.3*)	SYSTYPE=LINUX3
		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 /usr/lib/* /lib /lib/*
		    do
			test -e $lib/lib$name.a -o -e $lib/lib$name.so && {
			    SYSLIBS="$SYSLIBS -l$name"
			    break
			}
		    done
		done
		;;
     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"
		if [ -f /usr/lib/libdb.a ]; then
		    CCARGS="$CCARGS -DHAS_DB"
		    SYSLIBS="$SYSLIBS -ldb"
		fi
		;;
HP-UX.B.10.*)	SYSTYPE=HPUX10
		CCARGS="$CCARGS `nm /usr/lib/libc.a 2>/dev/null |
		    (grep usleep >/dev/null || echo '-DMISSING_USLEEP')`"
		if [ -f /usr/lib/libdb.a ]; then
		    CCARGS="$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 \$(WARN)"
		# Darwin > 1.3 uses awk and flat_namespace
		case $RELEASE in
		 1.[0-3]) AWK=gawk;;
		       *) AWK=awk
			  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="$CCARGS -DRESOLVE_H_NEEDS_ARPA_NAMESER_COMPAT_H";;
		esac
		# kqueue and/or poll are broken up to and including MacOS X 10.5
		CCARGS="$CCARGS -DNO_KQUEUE"
#		# Darwin 8.11.1 has kqueue support, but let's play safe
#		case $RELEASE in
#		 [1-8].*) CCARGS="$CCARGS -DNO_KQUEUE";;
#		       *) trap 'rm -f makedefs.test makedefs.test.[co]' 1 2 3 15
#			  cat >makedefs.test.c <<'EOF'
#/* Adapted from libevent. */
#
##include <sys/types.h>
##include <sys/event.h>
##include <sys/time.h>
##include <string.h>
##include <stdlib.h>
##include <stdio.h>
#
##ifndef EV_SET
##define EV_SET(kp, id, fi, fl, ffl, da, ud) do { \
#	struct kevent *__kp = (kp); \
#	__kp->ident = (id); \
#	__kp->filter = (fi); \
#	__kp->flags = (fl); \
#	__kp->fflags = (ffl); \
#	__kp->data = (da); \
#	__kp->udata = (ud); \
#    } while(0)
##endif
#
#int     main(int argc, char **argv)
#{
#    int     kq;
#    struct kevent test_change;
#    struct kevent test_result;
#
#    if ((kq = kqueue()) < 0) {
#	perror("kqueue");
#	exit(1);
#    }
##define TEST_FD (-1)
#
#    EV_SET(&test_change, TEST_FD, EVFILT_READ, EV_ADD, 0, 0, 0);
#    if (kevent(kq,
#	       &test_change, sizeof(test_change) / sizeof(struct kevent),
#	       &test_result, sizeof(test_result) / sizeof(struct kevent),
#	       (struct timespec *) 0) != 1 ||
#	test_result.ident != TEST_FD ||
#	test_result.flags != EV_ERROR) {
#	fprintf(stderr, "Error: kevent reports errors incorrectly\n");
#	exit(1);
#    }
#    exit(0);
#}
#EOF
#			  $CC -o makedefs.test makedefs.test.c || exit 1
#			  ./makedefs.test 2>/dev/null || 
#				CCARGS="$CCARGS -DNO_KQUEUE"
#			  rm -f makedefs.test makedefs.test.[co];;
#		esac
		;;
    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

#
# 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

#
# 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 $pcre_cflags"
			AUXLIBS="$AUXLIBS $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
#
# "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 $(WARN)'} ${OPT='-O'} ${DEBUG='-g'} ${AWK=awk} \
${WARN='-Wall -Wno-comment -Wformat -Wimplicit -Wmissing-prototypes \
	-Wparentheses -Wstrict-prototypes -Wswitch -Wuninitialized \
	-Wunused -Wno-missing-braces'}

export SYSTYPE AR ARFL RANLIB SYSLIBS CC OPT DEBUG AWK OPTS

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

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

sed 's/  / /g' <<EOF
SYSTYPE	= $SYSTYPE
AR	= $AR
ARFL	= $ARFL
RANLIB	= $RANLIB
SYSLIBS	= $AUXLIBS $SYSLIBS
CC	= $CC $CCARGS
OPT	= $OPT
DEBUG	= $DEBUG
AWK	= $AWK
STRCASE = $STRCASE
EXPORT	= AUXLIBS='$AUXLIBS' CCARGS='$CCARGS' OPT='$OPT' DEBUG='$DEBUG'
WARN	= $WARN
EOF