lc3tools: fix errors due to incorrect hardcoded paths

pkgs/development/tools/lc3tools/0002-lc3os-path.patch

@@ -0,0 +1,21 @@
+diff --git a/lc3sim.c b/lc3sim.c
+index dac7f7a..736fd7c 100644
+--- a/lc3sim.c
++++ b/lc3sim.c
+@@ -665,14 +665,14 @@ init_machine ()
+     bzero (lc3_sym_hash, sizeof (lc3_sym_hash));
+     clear_all_breakpoints ();
+ 
+-    if (read_obj_file (INSTALL_DIR "/lc3os.obj", &os_start, &os_end) == -1) {
++    if (read_obj_file (INSTALL_DIR "/share/lc3tools/lc3os.obj", &os_start, &os_end) == -1) {
+ 	if (gui_mode)
+ 	    puts ("ERR {Failed to read LC-3 OS code.}");
+ 	else
+ 	    puts ("Failed to read LC-3 OS code.");
+ 	show_state_if_stop_visible ();
+     } else {
+-	if (read_sym_file (INSTALL_DIR "/lc3os.sym") == -1) {
++	if (read_sym_file (INSTALL_DIR "/share/lc3tools/lc3os.sym") == -1) {
+ 	    if (gui_mode)
+ 		puts ("ERR {Failed to read LC-3 OS symbols.}");
+ 	    else

pkgs/development/tools/lc3tools/0003-lc3sim-tk-path.patch

@@ -0,0 +1,13 @@
+diff --git a/Makefile.def b/Makefile.def
+index 34f7df3..05dc86c 100644
+--- a/Makefile.def
++++ b/Makefile.def
+@@ -155,7 +155,7 @@ dist_lc3sim-tk: lc3sim-tk
+ 
+ lc3sim-tk: lc3sim-tk.def
+ 	${SED} -e 's @@WISH@@ ${WISH} g' \
+-		-e 's*@@LC3_SIM@@*"${INSTALL_DIR}/lc3sim"*g' \
++		-e 's*@@LC3_SIM@@*"${INSTALL_DIR}/bin/lc3sim"*g' \
+ 		-e 's!@@CODE_FONT@@!${CODE_FONT}!g' \
+ 		-e 's!@@BUTTON_FONT@@!${BUTTON_FONT}!g' \
+ 		-e 's!@@CONSOLE_FONT@@!${CONSOLE_FONT}!g' \

pkgs/development/tools/lc3tools/default.nix

@@ -13,6 +13,12 @@ stdenv.mkDerivation {
     # the original configure looks for things in the FHS path
     # I have modified it to take environment vars
     ./0001-mangle-configure.patch
+
+    # lc3sim looks for the LC3 OS in $out/share/lc3tools instead of $out
+    ./0002-lc3os-path.patch
+
+    # lc3sim-tk looks for lc3sim in $out/bin instead of $out
+    ./0003-lc3sim-tk-path.patch
   ];
 
   nativeBuildInputs = [ unzip ];
@@ -27,10 +33,9 @@ stdenv.mkDerivation {
   prefixKey = "--installdir ";
 
   postInstall = ''
-    rm $out/{COPYING,NO_WARRANTY,README}
     mkdir -p $out/{bin,share/lc3tools}
 
-    mv -t $out/share/lc3tools $out/lc3os*
+    mv -t $out/share/lc3tools $out/{COPYING,NO_WARRANTY,README} $out/lc3os*
     mv -t $out/bin $out/lc3*
   '';