Update the Configurations READMEs

Reviewed-by: NTim Hudson <tjh@openssl.org>

Configurations/README

@@ -498,6 +498,8 @@ They are all expected to return a string with the lines they produce.
 
                         generatesrc(src => "PATH/TO/tobegenerated",
                                     generator => [ "generatingfile", ... ]
+                                    generator => [ "generatingfile", ... ]
+                                    incs => [ "INCL/PATH", ... ],
                                     deps => [ "dep1", ... ],
                                     intent => one of "libs", "dso", "bin" );
 
@@ -507,9 +509,11 @@ They are all expected to return a string with the lines they produce.
                   expected to be the file to generate from.
                   generatesrc() is expected to analyse and figure out
                   exactly how to apply that file and how to capture
-                  the result.  'deps' is a list of explicit
-                  dependencies.  'intent' indicates what the generated
-                  file is going to be used for.
+                  the result.  'incs' and 'deps' are include
+                  directories and files that are used if $(CC) used as
+                  an intermediary step when generating the end product
+                  (the file indicated by 'src').  'intent' indicates
+                  what the generated file is going to be used for.
 
     src2obj     - function that produces build file lines to build an
                   object file from source files and associated data.

Configurations/README.design

@@ -103,9 +103,8 @@ This build.info file informs us that 'libcrypto' is built from a few
 source files, 'crypto/aes.c', 'crypto/evp.c' and 'crypto/cversion.c'.
 It also shows us that building the object file inferred from
 'crypto/cversion.c' depends on 'crypto/buildinf.h'.  Finally, it 
-also shows the possibility to include raw build-file statements in a
-build.info file, in this case showing how 'buildinf.h' is built on
-Unix-like operating systems.
+also shows the possibility to declare how some files are generated
+using some script, in this case a perl script.
 
 Two things are worth an extra note:
 
@@ -153,10 +152,10 @@ information comes down to this:
     INCLUDE[apps/openssl]=. include
     DEPEND[apps/openssl]=libssl
 
-    ENGINES=engines/libossltest
-    SOURCE[engines/libossltest]=engines/e_ossltest.c
-    DEPEND[engines/libossltest]=libcrypto
-    INCLUDE[engines/libossltest]=include
+    ENGINES=engines/ossltest
+    SOURCE[engines/ossltest]=engines/e_ossltest.c
+    DEPEND[engines/ossltest]=libcrypto
+    INCLUDE[engines/ossltest]=include
     
     GENERATE[crypto/buildinf.h]=util/mkbuildinf.pl "$(CC) $(CFLAGS)" "$(PLATFORM)"
     DEPEND[crypto/buildinf.h]=Makefile
@@ -202,6 +201,10 @@ indexes:
   engines   => a list of engines.  These are directly inferred from
                the ENGINES variable in build.info files.
 
+  generate  => a hash table containing 'file' => [ 'generator' ... ]
+               pairs.  These are directly inferred from the GENERATE
+               variables in build.info files.
+
   includes  => a hash table containing 'file' => [ 'include' ... ]
                pairs.  These are directly inferred from the INCLUDE
                variables in build.info files.
@@ -247,11 +250,15 @@ section above would be digested into a %unified_info table:
                     [
                         "libssl",
                     ],
+                "crypto/buildinf.h" =>
+                    [
+                        "Makefile",
+                    ],
                 "crypto/cversion.o" =>
                     [
                         "crypto/buildinf.h",
                     ],
-                "engines/libossltest" =>
+                "engines/ossltest" =>
                     [
                         "libcrypto",
                     ],
@@ -262,8 +269,18 @@ section above would be digested into a %unified_info table:
             },
         "engines" =>
             [
-                "engines/libossltest",
+                "engines/ossltest",
             ],
+        "generate" =>
+            {
+                "crypto/buildinf.h" =>
+                    [
+                        "util/mkbuildinf.pl",
+                        "\"\$(CC)",
+                        "\$(CFLAGS)\"",
+                        "\"$(PLATFORM)\"",
+                    ],
+            },
         "includes" =>
             {
                 "apps/openssl" =>
@@ -271,7 +288,7 @@ section above would be digested into a %unified_info table:
                         ".",
                         "include",
                     ],
-                "engines/libossltest" =>
+                "engines/ossltest" =>
                     [
                         "include"
                     ],
@@ -308,9 +325,6 @@ section above would be digested into a %unified_info table:
             ],
         "rawlines" =>
             [
-                "crypto/buildinf.h : Makefile",
-                "	perl util/mkbuildinf.h \"\$(CC) \$(CFLAGS)\" \"\$(PLATFORM)\" \\"
-                "	    > crypto/buildinf.h"
             ],
         "sources" =>
             {
@@ -338,7 +352,7 @@ section above would be digested into a %unified_info table:
                     [
                         "engines/e_ossltest.c",
                     ],
-                "engines/libossltest" =>
+                "engines/ossltest" =>
                     [
                         "engines/e_ossltest.o",
                     ],
@@ -382,6 +396,29 @@ build static libraries from object files, to build shared libraries
 from static libraries, to programs from object files and libraries,
 etc.
 
+    generatesrc - function that produces build file lines to generate
+                  a source file from some input.
+
+                  It's called like this:
+
+                        generatesrc(src => "PATH/TO/tobegenerated",
+                                    generator => [ "generatingfile", ... ]
+                                    incs => [ "INCL/PATH", ... ],
+                                    deps => [ "dep1", ... ],
+                                    intent => one of "libs", "dso", "bin" );
+
+                  'src' has the name of the file to be generated.
+                  'generator' is the command or part of command to
+                  generate the file, of which the first item is
+                  expected to be the file to generate from.
+                  generatesrc() is expected to analyse and figure out
+                  exactly how to apply that file and how to capture
+                  the result.  'incs' and 'deps' are include
+                  directories and files that are used if $(CC) used as
+                  an intermediary step when generating the end product
+                  (the file indicated by 'src').  'intent' indicates
+                  what the generated file is going to be used for.
+
     src2obj     - function that produces build file lines to build an
                   object file from source files and associated data.
 
@@ -509,25 +546,22 @@ following calls:
     # Note 2: libobj2shlib gets both the name of the static library
     # and the names of all the object files that go into it.  It's up
     # to the implementation to decide which to use as input.
+    # Note 3: common.tmpl peals off the ".o" extension from all object
+    # files, as the platform at hand may have a different one.
     libobj2shlib(shlib => "libssl",
                  lib => "libssl",
-                 objs => [ "ssl/tls.o" ],
+                 objs => [ "ssl/tls" ],
                  deps => [ "libcrypto" ]
                  ordinals => [ "ssl", "util/libssl.num" ]);
 
     obj2lib(lib => "libssl"
-            objs => [ "ssl/tls.o" ]);
+            objs => [ "ssl/tls" ]);
 
-    # Note 3: common.tmpl peals off the ".o" extension, as the
-    # platform at hand may have a different one.
     src2obj(obj => "ssl/tls"
             srcs => [ "ssl/tls.c" ],
             deps => [ ],
-            incs => [ "include" ]);
-
-    src2dep(obj => "ssl/tls"
-            srcs => [ "ssl/tls.c" ],
-            incs => [ "include" ]);
+            incs => [ "include" ],
+            intent => "lib");
 
 The returned strings from all those calls are then concatenated
 together and written to the resulting build-file.