Implement extension load-order deps.

Author: wez

acinclude.m4

@@ -1920,3 +1920,14 @@ AC_DEFUN(PHP_TEST_BUILD, [
     LIBS=$old_LIBS
   ])
 ])
+
+dnl This macro is currently a placeholder in the config.m4 file
+dnl it is scanned by genif.sh when it builds the internal functions
+dnl list, so that modules can be init'd in the correct order
+dnl $1 = name of extension, $2 = extension upon which it depends
+dnl $3 = optional: if true, it's ok for $2 to have not been configured
+dnl default is false and should halt the build.
+dnl See ADD_EXTENSION_DEP in win32 build 
+AC_DEFUN(PHP_ADD_EXTENSION_DEP, [])
+
+

build/genif.sh

@@ -1,6 +1,6 @@
 #! /bin/sh
 
-# $Id: genif.sh,v 1.3 2002-03-22 10:22:41 sas Exp $
+# $Id: genif.sh,v 1.4 2004-07-18 12:03:51 wez Exp $
 # replacement for genif.pl
 
 infile=$1
@@ -17,13 +17,13 @@ if test -z "$infile" || test -z "$srcdir"; then
 	exit 1
 fi
 
-module_ptrs=$extra_module_ptrs
 header_list=
 olddir=`pwd`
 cd $srcdir
 
+module_ptrs="$extra_module_ptrs`echo $@ | $awk -f ./build/order_by_dep.awk`"
+
 for ext in ${1+"$@"} ; do
-	module_ptrs="	phpext_${ext}_ptr,@NEWLINE@$module_ptrs"
 	header_list="$header_list ext/$ext/*.h"
 done
 

build/order_by_dep.awk

@@ -0,0 +1,89 @@
+BEGIN {
+	orig_rs = RS;
+	orig_fs = FS;
+	RS=" ";
+	mod_count = 0;
+	SUBSEP=":";
+}
+
+function get_deps(module_name,       depline, cmd)
+{
+	# this could probably be made *much* better
+	RS=orig_rs;
+	FS="[(,) \t]+"
+	cmd = "grep PHP_ADD_EXTENSION_DEP ext/" module_name "/config*.m4"
+	while (cmd | getline) {
+#		printf("GOT: %s,%s,%s,%s,%s\n", $1, $2, $3, $4, $5);
+		if (!length($5)) {
+			$5 = 0;
+		}
+		mod_deps[module_name, $4] = $5;
+	}
+	close(cmd)
+	RS=" ";
+	FS=orig_fs;
+}
+
+function get_module_index(name,  i)
+{
+	for (i in mods) {
+		if (mods[i] == name) {
+			return i;
+		}
+	}
+	return -1;
+}
+
+function do_deps(mod_idx,        module_name, mod_name_len, dep, ext, val, depidx)
+{
+	module_name = mods[mod_idx];
+	mod_name_len = length(module_name);
+
+	for (ext in mod_deps) {
+		if (substr(ext, 0, mod_name_len+1) != module_name SUBSEP) {
+			continue;
+		}
+		val = mod_deps[ext];
+		ext = substr(ext, mod_name_len+2, length(ext)-mod_name_len);
+
+		depidx = get_module_index(ext);
+		if (depidx >= 0) {
+			do_deps(depidx);
+		}
+	}
+
+	#printf("	phpext_%s_ptr,\n", module_name);
+	printf("	phpext_%s_ptr,@NEWLINE@", module_name);
+	delete mods[mod_idx];
+}
+
+function count(arr,       n, i)
+{
+	n = 0;
+	for (i in arr)
+		n++;
+	return n;
+}
+
+/^[a-zA-Z0-9_-]+/ {
+	# mini hack for pedantic awk
+	gsub("[^a-zA-Z0-9_-]", "", $1)
+	# add each item to array
+	mods[mod_count++] = $1
+
+	# see if it has any module deps
+	get_deps($1);
+}
+END {
+	# order it correctly
+	out_count = 0;
+	
+	while (count(mods)) {
+		# count down, since we need to assemble it in reverse order
+		for (i = mod_count-1; i >= 0; --i) {
+			if (i in mods) {
+				do_deps(i);
+			}
+		}
+	}
+}

configure.in

@@ -130,7 +130,31 @@ PHP_RUNPATH_SWITCH
 PHP_PROG_RE2C
 AC_PROG_RANLIB
 AC_PROG_LN_S
-AC_PROG_AWK
+
+dnl Some vendors force mawk before gawk; mawk is broken so we don't like that,
+dnl and check manually
+dnl AC_PROG_AWK
+AC_CHECK_PROGS(AWK, gawk nawk awk mawk, bork, /usr/xpg4/bin/:$PATH)
+case "$AWK" in
+	*mawk)
+		AC_MSG_WARN([mawk is known to have problems on some systems.  You should install GNU awk])
+		;;
+	*gawk)
+		;;
+	bork)
+		AC_MSG_ERROR([Could not find awk; Install GNU awk])
+		;;
+	*)
+		AC_MSG_CHECKING([if $AWK is broken])
+		if ! $AWK 'function foo() {}' >/dev/null 2>&1 ; then
+			AC_MSG_RESULT([yes])
+			AC_MSG_ERROR([You should install GNU awk])
+		else
+			AC_MSG_RESULT([no - good!])
+		fi
+		;;
+esac
+
 AC_PROG_YACC
 if test "$YACC" != "bison -y"; then
     AC_MSG_WARN([You will need bison if you want to regenerate the PHP parsers.])

ext/dom/config.m4

@@ -26,6 +26,7 @@ if test "$PHP_DOM" != "no" && test "$PHP_LIBXML" != "no"; then
                             typeinfo.c domerror.c domlocator.c namednodemap.c userdatahandler.c], 
                             $ext_shared)
     PHP_SUBST(DOM_SHARED_LIBADD)
+	PHP_ADD_EXTENSION_DEP(dom, libxml)
   ], [
     AC_MSG_ERROR([xml2-config not found. Please check your libxml2 installation.])
   ])

ext/simplexml/config.m4

@@ -18,4 +18,5 @@ if test "$PHP_SIMPLEXML" != "no" && test "$PHP_LIBXML" != "no"; then
   ], [
     AC_MSG_ERROR([xml2-config not found. Please check your libxml2 installation.])
   ])
+  PHP_ADD_EXTENSION_DEP(simplexml, libxml)
 fi

ext/spl/config.m4

@@ -10,4 +10,5 @@ if test "$PHP_SPL" != "no"; then
   fi
   AC_DEFINE(HAVE_SPL, 1, [Whether you want SPL (Standard PHP Library) support]) 
   PHP_NEW_EXTENSION(spl, php_spl.c spl_functions.c spl_engine.c spl_iterators.c spl_array.c spl_directory.c spl_sxe.c, $ext_shared)
+  PHP_ADD_EXTENSION_DEP(spl, simplexml)
 fi

ext/xml/config.m4

@@ -47,5 +47,6 @@ if test "$PHP_XML" != "no" && test "$PHP_LIBXML" != "no" -o "$PHP_LIBEXPAT_DIR"
 
   PHP_NEW_EXTENSION(xml, xml.c $xml_extra_sources, $ext_shared)
   PHP_SUBST(XML_SHARED_LIBADD)
+  PHP_ADD_EXTENSION_DEP(xml, libxml)
   AC_DEFINE(HAVE_XML, 1, [ ])
 fi

ext/xsl/config.m4

@@ -59,4 +59,5 @@ if test "$PHP_XSL" != "no"; then
   AC_DEFINE(HAVE_XSL,1,[ ])
   PHP_NEW_EXTENSION(xsl, php_xsl.c xsltprocessor.c, $ext_shared)
   PHP_SUBST(XSL_SHARED_LIBADD)
+  PHP_ADD_EXTENSION_DEP(xsl, libxml)
 fi