New Configuration Setup

[Jim Jagielski <ji...@jaguNET.com>]

This, and the next 2 Emails, is my take on the new-improved Configuration
setup. This one uses the GNU autoconf system to return the OS/Platform
that we are compiling one. The 'autoconf/configure' script is an official
autoconf script.

This is the Configure script itself (./src/Configure):

#!/bin/sh
# $Id: Configure,v 1.16 1996/09/08 17:18:45 jim Exp $
trap 'rm $tmpfile; exit' 0 1 2 3 15

# Apache configuration script, first cut --- rst.
# Dont like it?  Inspired to do something better?  Go for it.

# second cut --- jmj
# At this point we change what Configuration contains. It maintain
# contains comments, specific compiler flags, a list of included
# modules and "rules". These rules are used to allow Configure to
# be totally configured from Configuration

file=Configuration
tmpfile=htconf.$$

if [ "x$1" = "x-file" ] ; then
  echo "Using alternate config file $2"
  file=$2 
else
  echo "Using '$file' as config file"
fi

# First, strip comments and blank lines and then change Rules to comments

sed 's/#.*//' $file | sed '/^[ 	]*$/d' | sed 's/[ 	]*$//' | \
 sed 's/^Rule[ 	]*/##Rule:/' > $tmpfile

# Check for syntax errors...

if egrep -v '^Module[ 	]+[A-Za-z0-9_]+[ 	]+[^ 	]+$' $tmpfile | \
   grep -v = > /dev/null
then
   echo "Syntax error --- The configuration file is used only to"
   echo "define the list of included modules or to set Makefile"
   echo "options or Configure rules, and I don't see that at all:"
   egrep -v '^Module[ 	]+[A-Za-z0-9_]+[ 	]+[^ 	]+$' $tmpfile | \
     grep -v =
   exit 1
fi

# File is OK --- make backup copies of things and then get the new ones:

if [ -f Makefile ] ; then mv Makefile Makefile.bak; fi
if [ -f modules.c ] ; then mv modules.c modules.c.bak; fi

awk >modules.c <$tmpfile '\
   BEGIN { modules[n++] = "core_module" } \
   /^Module/ { modules[n++] = $2 } \
   END { print "/* modules.c --- automatically generated by Apache"; \
         print " * configuration script.  DO NOT HAND EDIT!!!!!"; \
         print " */"; \
         print ""; \
	 print "#include \"httpd.h\""; \
	 print "#include \"http_config.h\""; \
         print ""; \
         for (i = 0; i < n; ++i) { \
             printf ("extern module %s;\n", modules[i]); \
         } \
         print ""; \
         print "module *prelinked_modules[] = {"; \
         for (i = 0; i < n; ++i) { \
             printf "  &%s,\n", modules[i]; \
         } \
	 print "  NULL"; \
         print "};"; \
         print "char *module_names[] = {"; \
         for (i = n-1; i > -1; --i) { \
             printf "  \"%s\",\n", modules[i]; \
         } \
       print "  NULL"; \
         print "};"; \
   }'

#
# Add module set only
#
awk >Makefile <$tmpfile '\
   BEGIN { print "# Makefile automatically generated from Makefile.tmpl"; \
	   print "# and configuration file by Apache config script. "; \
	   print "# Hand-edited changes will be lost if the config script"; \
	   print "# is re-run."; \
         } \
   /^Module/ { modules[n++] = $3 } \
   END { print "MODULES=\\"; \
         for (i = 0; i < n; ++i) { \
             if (i < n-1) printf ("  %s \\\n", modules[i]); \
             else printf ("  %s\n", modules[i]); \
         } \
         print "" \
       }'
#
# Now add Makefile additions and Rules
#
awk >>Makefile <$tmpfile '\
    BEGIN { print "# Makefile options inherited from Configure"; \
            print "###############"; \
	  } \
    /\=/ { print } \
    END { print "###############"; }'

#
# Now we determine the OS/Platform automagically, thanks to
# FSF autoconf.
# We adjust CFLAGS, LIBS, LFLAGS and INCLUDES (and other Makefile
# options) as required. Setting CC and OPTIM here has no effect
# if they were set in Configure.
#
# Also, we set DEF_WANTHSREGEX and DEF_BADMMAP to the appropriate
# value for each platform.
#
# As more PLATFORMs are added to Configuration.tmpl, be sure to
# add the required lines below.
#

PLAT=`./autoconf/configure`

case "$PLAT" in
    *-apple-aux3*)
	OS='A/UX 3.1.x'
	CFLAGS="$CFLAGS -DAUX -D_POSIX_SOURCE"
	LIBS="$LIBS -lposix -lbsd"
	LFLAGS="$LFLAGS -s"
	DEF_WANTHSREGEX=no
	DEF_BADMMAP=no
	;;
    *-ibm-aix*)
	OS='IBM AIX'
	CFLAGS="$CFLAGS -DAIX -U__STR__"
	;;
    *-apollo-*)
	OS='Apollo Domain'
	CFLAGS="$CFLAGS -DAPOLLO"
	;;
    *-dg-dgux-*)
	OS='DG/UX 5.4'
	CFLAGS="$CFLAGS -DDGUX"
	;;
    OS/2)
	OS='EMX OS/2'
	CFLAGS="$CFLAGS -Zbsd-signals -Zbin-files -DNO_KILLPG -DNEED_STRCASECMP -DNO_SETSID -g"
	LIBS="$LIBS -lsocket -llibufc -lgdbm -lbsd"
	;;
    *-hp-hpux10.*)
	OS='HP-UX 10'
	CFLAGS="$CFLAGS -DHPUX10"
	;;
    *-hp-hpux*)
	OS='HP-UX'
	CFLAGS="$CFLAGS -DHPUX"
	;;
    *-sgi-irix*)
	OS='SGI IRIX'
	CFLAGS="$CFLAGS -DIRIX"
	;;
    IRIXNIS)
	OS='SGI IRIX w/NIS'
	CFLAGS="$CFLAGS -DIRIX"
	LIBS="$LIBS -lsun"
	;;
    *-linux-*)
	OS='Linux'
	CFLAGS="$CFLAGS -DLINUX"
	;;
    *-lynx-lynxos*)
	OS='LynxOS'
	CFLAGS="$CFLAGS -DLYNXOS"
	LIBS="$LIBS -lbsd -ldes -lc_p"
	;;
    *486-*-bsdi*)
	OS='BSDI w/486'
	CFLAGS="$CFLAGS -m486"
	;;
    *-bsdi*)
	OS='BSDI'
	;;
    *486-*-freebsd*|*486-*-netbsd*)
	OS='FreeBSD/NETBSD on 486'
	LIBS="$LIBS -lcrypt"
	;;
    *-freebsd*|*-netbsd*)
	OS='FreeBSD/NetBSD'
	LIBS="$LIBS -lcrypt"
	;;
    *-next-nextstep*)
	OS='NeXT'
	CFLAGS="$CFLAGS -DNEXT"
	;;
    *-dec-osf*)
	OS='DEC OSF/1'
	CFLAGS="$CFLAGS -DOSF1"
	;;
    QNX)
	OS='QNX'
	CFLAGS="$CFLAGS -DQNX"
	LIBS="$LIBS -N128k -lsocket"
	;;
    *-sco3*)
	OS='SCO 3'
	CFLAGS="$CFLAGS -DSCO -Oacgiltz"
	LIBS="$LIBS -lPW -lsocket -lmalloc -lcrypt_i"
	;;
    *-sco5*)
	OS='SCO 5'
	CFLAGS="$CFLAGS -DSCO5"
	LIBS="$LIBS -lsocket -lmalloc -lprot"
	OSBPRINTF="-K noinline"
	DEF_WANTHSREGEX=no
	DEF_BADMMAP=no
	;;
    *-solaris2*)
	OS='Solaris 2'
	CFLAGS="$CFLAGS -DSOLARIS2"
	LIBS="$LIBS -lsocket -lnsl"
	;;
    *-sunos4*)
	OS='SunOS 4'
	CFLAGS="$CFLAGS -DSUNOS4"
	;;
    UNIXWARE)
	OS='Unixware'
	CFLAGS="$CFLAGS -DSVR4"
	LIBS="$LIBS -lsocket -lnsl -lcrypt"
	;;
    *-sysv4*)
	OS='SVR4'
	CFLAGS="$CFLAGS -DSVR4"
	LIBS="$LIBS -lsocket -lnsl -lc"
	;;
    UTS)
	OS='Amdahl UTS'
	CFLAGS="$CFLAGS -Xa -eft -DUTS21"
	LIBS="$LIBS -lsocket -lbsd -la"
	;;
    UXPDS)
	OS='UXP/DS'
	CFLAGS="$CFLAGS -DUXPDS"
	LIBS="$LIBS -lsocket -lnsl"
	;;
    *) # default: Catch systems we don't know about
    	echo Sorry, but we cannot grok \"$PLAT\"
	echo Please Email this output to apache-bugs@apache.org
	echo Thank you
	exit 1
	;;
esac

# Extract the rules

RULE_WANTHSREGEX=`./CutRule WANTHSREGEX`
RULE_STATUS=`./CutRule STATUS`
RULE_SOCKS=`./CutRule SOCKS`
RULE_BADMMAP=`./CutRule BADMMAP`

if [ "$RULE_WANTHSREGEX" = "default" ]; then
	if [ "x$DEF_WANTHSREGEX" = "x" ]; then
		RULE_WANTHSREGEX=no
	else
		RULE_WANTHSREGEX=$DEF_WANTHSREGEX
	fi
fi

if [ "$RULE_BADMMAP" = "default" ]; then
	if [ "x$DEF_BADMMAP" = "x" ]; then
		RULE_BADMMAP=no
	else
		RULE_BADMMAP=$DEF_BADMMAP
	fi
fi

# Show the final values of the rules

echo "# Platform: $OS" >> Makefile
echo "# Final Rules:" >> Makefile
echo "# Rule WANTHSREGEX=$RULE_WANTHSREGEX" >> Makefile
echo "# Rule BADMMAP=$RULE_BADMMAP" >> Makefile
echo "###############" >> Makefile

#
# Now that _that's_ done, get on with it
#

echo "Configured for $OS platform"
echo

#
# Handle the setting of CC and OPTIM. The values in Configure
# have priority. If not set there, then we check if they were
# set above. If so, then we honor that; if not, then we set some
# defaults (gcc and -O2)
#
if grep "CC=" Makefile > /dev/null; then
    CC=""	# clear it just in case
else
    if [ "x$CC" = "x" ]; then CC="gcc"; fi
fi

#
# Ditto for optimization
#
if  grep "OPTIM=" Makefile > /dev/null; then
    OPTIM=""	# ditto
else
    if [ "x$OPTIM" = "x" ]; then OPTIM="-O2"; fi
fi

#
# Are they using the status monitor module? If so, check
# for STATUS rule...
#
STAT_MOD="mod_status"
if grep "$STAT_MOD" Makefile > /dev/null; then
    if [ "$RULE_STATUS" = "yes" ]; then
	CFLAGS="$CFLAGS -DSTATUS"
    fi
fi

#
# Now HS's POSIX regex implementation if needed/wanted
#
if [ "$RULE_WANTHSREGEX" = "yes" ]; then
    REGLIB="regex/libregex.a"
    INCLUDES="$INCLUDES -Iregex"
fi

#
# Broken mmap?
#
if [ "$RULE_BADMMAP" = "yes" ]; then
    CFLAGS="$CFLAGS -DNO_MMAP"
fi

#
# Now SOCKS.
#  NOTE: We assume that if they are using SOCKS, then they've
#   adjusted EXTRA_LIBS and/or EXTRA_LFLAGS as required,
#   otherwise we assume "-L/usr/local/lib -lsocks"
#
if [ "$RULE_SOCKS" = "yes" ]; then
    # Set flag and check Makefile for -lsocks line
    CFLAGS="$CFLAGS -Dconnect=Rconnect -Dselect=Rselect"
    CFLAGS="$CFLAGS -Dgethostbyname=Rgethostbyname"
    if grep "EXTRA_" Makefile | grep "\-lsocks" > /dev/null; then
	:
    else
	LIBS="$LIBS -L/usr/local/lib -lsocks"
    fi
fi
#
# Good enough
#
echo  >> Makefile
if [ "x$CC" != "x" ]; then
    echo "CC=$CC" >> Makefile
fi
if [ "x$OPTIM" != "x" ]; then
    echo "OPTIM=$OPTIM" >> Makefile
fi
echo "CFLAGS1=$CFLAGS">> Makefile
echo "INCLUDES1=$INCLUDES">> Makefile
echo "LIBS1=$LIBS">> Makefile
echo "LFLAGS1=$LFLAGS">> Makefile
echo "BROKEN_BPRINTF_FLAGS=$OSBPRINTF">> Makefile
echo "REGLIB=$REGLIB">> Makefile
echo >> Makefile
echo "#### End of Configure created section ####">> Makefile
echo >> Makefile

cat Makefile.tmpl >> Makefile