Adds linking exception license to runtime parts.

Makefile

@@ -111,7 +111,7 @@ disk/%: %
 	tr '\n' '\233' < $< > $@
 
 disk/%.txt: %.md
-	sed -e 's/`\(.*\)`/\1/g' < $< | tr '\n' '\233' > $@
+	LC_ALL=C awk 'BEGIN{for(n=0;n<127;n++)chg[sprintf("%c",n)]=128+n} {l=length($$0);for(i=1;i<=l;i++){c=substr($$0,i,1);if(c=="`"){x=1-x;if(x)c="\002";else c="\026";}else if(x)c=chg[c];printf "%c",c;}printf "\233";}' < $< > $@
 
 # Copy ".XEX" as ".COM"
 disk/fb.com: $(PROG)

README.md

@@ -25,6 +25,25 @@ Sample files
 In the "tests" folder there are some samples of the language.
 
 
+License
+-------
+
+FastBasic is free software under the terms of the GNU General Public License,
+either version 2 or lather, see the file [LICENSE](LICENSE) for the full text.
+
+The runtime is also under the following linking exception:
+
+> In addition to the permissions in the GNU General Public License, the authors
+> give you unlimited permission to link the compiled version of this file into
+> combinations with other programs, and to distribute those combinations without
+> any restriction coming from the use of this file. (The General Public License
+> restrictions do apply in other respects; for example, they cover modification
+> of the file, and distribution when not linked into a combine executable.)
+
+This means that you can distribute the compiled result of any program written
+by you under any license of your choosing, either proprietary or copyleft.
+
+
 Compiling the sources
 ---------------------
 

src/alloc.asm

@@ -15,6 +15,14 @@
 ; You should have received a copy of the GNU General Public License along
 ; with this program.  If not, see <http://www.gnu.org/licenses/>
 ;
+; In addition to the permissions in the GNU General Public License, the
+; authors give you unlimited permission to link the compiled version of
+; this file into combinations with other programs, and to distribute those
+; combinations without any restriction coming from the use of this file.
+; (The General Public License restrictions do apply in other respects; for
+; example, they cover modification of the file, and distribution when not
+; linked into a combine executable.)
+
 
 ; Memory functions
 ; ----------------

src/interpreter.asm

@@ -15,6 +15,14 @@
 ; You should have received a copy of the GNU General Public License along
 ; with this program.  If not, see <http://www.gnu.org/licenses/>
 ;
+; In addition to the permissions in the GNU General Public License, the
+; authors give you unlimited permission to link the compiled version of
+; this file into combinations with other programs, and to distribute those
+; combinations without any restriction coming from the use of this file.
+; (The General Public License restrictions do apply in other respects; for
+; example, they cover modification of the file, and distribution when not
+; linked into a combine executable.)
+
 
 ; The opcode interpreter
 ; ----------------------

src/menu.asm

@@ -206,6 +206,9 @@ COMP_TRAILER:
         .export COMP_RT_SIZE
 COMP_RT_SIZE = __RUNTIME_RUN__ + __RUNTIME_SIZE__ - __JUMPTAB_RUN__
 
+        ; This is the runtime startup code, copied into the resulting
+        ; executables.
+        ; Note that this code is patched before writing to a file.
         .segment        "RUNTIME"
 compiled_start:
         lda     #0

src/runtime.asm

@@ -15,6 +15,14 @@
 ; You should have received a copy of the GNU General Public License along
 ; with this program.  If not, see <http://www.gnu.org/licenses/>
 ;
+; In addition to the permissions in the GNU General Public License, the
+; authors give you unlimited permission to link the compiled version of
+; this file into combinations with other programs, and to distribute those
+; combinations without any restriction coming from the use of this file.
+; (The General Public License restrictions do apply in other respects; for
+; example, they cover modification of the file, and distribution when not
+; linked into a combine executable.)
+
 
 ; Common runtime between interpreter and parser
 ; ---------------------------------------------

src/standalone.asm

@@ -15,6 +15,14 @@
 ; You should have received a copy of the GNU General Public License along
 ; with this program.  If not, see <http://www.gnu.org/licenses/>
 ;
+; In addition to the permissions in the GNU General Public License, the
+; authors give you unlimited permission to link the compiled version of
+; this file into combinations with other programs, and to distribute those
+; combinations without any restriction coming from the use of this file.
+; (The General Public License restrictions do apply in other respects; for
+; example, they cover modification of the file, and distribution when not
+; linked into a combine executable.)
+
 
 ; Standalone interpreter
 ; ----------------------