Add features for specifying CPU code generation: address-model, architecture, and instruction-set. Transplanted from BBv1.

[SVN r30744]

src/tools/builtin.jam

@@ -112,6 +112,56 @@ feature def-file : : free dependency ;
 # of the library.
 feature allow : : free ;
 
+# The addressing model to generate code for.
+# Currently a limited set only specifying the bit size of pointers.
+feature address-model : 16 32 64
+    : propagated optional ;
+
+# Type of CPU architecture to compile for.
+feature architecture :
+    # x86 and x86-64
+    x86
+    # ia64
+    ia64
+    # Sparc
+    sparc
+    # RS/6000 & PowerPC
+    power
+    # MIPS/SGI
+    mips1 mips2 mips3 mips4 mips32 mips32r2 mips64
+    #
+    : propagated optional ;
+
+# The specific instruction set in an architecture to compile.
+feature instruction-set :
+    # x86 and x86-64
+    i386 i486 i586 i686
+    pentium pentium-mmx pentiumpro pentium2 pentium3 pentium3m pentium-m pentium4 pentium4m
+    prescott nocona
+    k6 k6-2 k6-3 athlon athlon-tbird athlon-4 athlon-xp athlon-mp
+    k8 opteron athlon64 athlon-fx
+    winchip-c6 winchip2
+    c3 c3-2
+    # ia64
+    itanium itanium1 merced itanium2 mckinley
+    # Sparc
+    v7 cypress v8 supersparc sparclite hypersparc sparclite86x
+    f930 f934 sparclet tsc701 v9 ultrasparc
+    # RS/6000 & PowerPC
+    401 403 405 405fp 440 440fp 505
+    601 602 603 603e 604 604e 620 630 740 7400 7450 750
+    801 821 823 860 970 8540
+    power-common ec603e g3 g4 g5 
+    power power2 power3 power4 power5 powerpc powerpc64
+    rios rios1 rsc rios2 rs64a
+    # MIPS
+    4kc 4kp 5kc 20kc m4k
+    r2000 r3000 r3900 r4000 r4100 r4300 r4400 r4600 r4650 r6000 r8000
+    rm7000 rm9000 orion sb1
+    vr4100 vr4111 vr4120 vr4130 vr4300 vr5000 vr5400 vr5500
+    #
+    : propagated optional ;
+
 # Windows-specific features
 
 feature user-interface : console gui wince native auto ;