--- ./build.jam.org	2008-11-29 12:28:30.000000000 +0900
+++ ./build.jam	2009-08-11 01:26:24.000000000 +0900
@@ -181,7 +181,7 @@
     : -L$(--python-lib[1]) -l$(--python-lib[2]) ;
 ## MacOSX Darwin, using GCC 2.9.x, 3.x
 toolset darwin cc :  "-o " : -D
-    :
+    : -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4
     [ opt --release : -Wl,-x -O3 -finline-functions ]
     [ opt --debug : -g -O0 -fno-inline -pg ]
     [ opt --profile : -Wl,-x -O3 -finline-functions -g -pg ]
--- ./build.sh.org	2008-11-29 12:28:30.000000000 +0900
+++ ./build.sh	2009-08-11 01:18:40.000000000 +0900
@@ -133,7 +133,7 @@
     ;;
 
     darwin)
-    BOOST_JAM_CC=cc
+    BOOST_JAM_CC="cc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4"
     ;;
 
     intel-linux)
--- ./Jambase.org	2008-11-29 12:28:30.000000000 +0900
+++ ./Jambase	2009-08-11 01:14:22.000000000 +0900
@@ -903,8 +903,9 @@
 
     case MACOSX :
     AR          ?= libtool -o ;
-    C++         ?= c++ ;
-    MANDIR      ?= /usr/local/share/man ;
+    CC          ?= cc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4 ;
+    C++         ?= c++ -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk -mmacosx-version-min=10.4 ;
+    MANDIR      ?= /opt/local/share/man ;
     RANLIB      ?= "" ;
 
     case NCR :
@@ -969,7 +970,7 @@
     AS          ?= as ;
     ASFLAGS     ?= ;
     AWK         ?= awk ;
-    BINDIR      ?= /usr/local/bin ;
+    BINDIR      ?= /opt/local/bin ;
     C++         ?= cc ;
     C++FLAGS    ?= ;
     CC          ?= cc ;
@@ -987,12 +988,12 @@
     JAMFILE     ?= Jamfile ;
     JAMRULES    ?= Jamrules ;
     LEX         ?= ;
-    LIBDIR      ?= /usr/local/lib ;
+    LIBDIR      ?= /opt/local/lib ;
     LINK        ?= $(CC) ;
     LINKFLAGS   ?= ;
     LINKLIBS    ?= ;
     LN          ?= ln ;
-    MANDIR      ?= /usr/local/man ;
+    MANDIR      ?= /opt/local/man ;
     MKDIR       ?= mkdir ;
     MV          ?= mv -f ;
     OPTIM       ?= ;