Allow examples and test-suite to be built out of source tree

- Examples/Makefile.in rules use SRCDIR as the relative source directory

- ./config.status replicates Examples/ source directory tree in build
  directory, and copies each Makefile to build directory, prefixed with
  a header which sets SRCDIR to source directory

- Examples/test-suite/.../Makefile.in set SRCDIR from Autoconf-set srcdir

- Examples/test-suite/errors/Makefile.in needs to filter out source
  directory from SWIG error messages

- Lua: embedded interpreters are passed location of run-time test

- Python: copy run-time scripts to build directory because of 2to3
  conversion; import_packages example copies __init__.py from source
  directory; test-suite sets SCRIPTDIR to location of run-time tests

- Javascript: binding.gyp renamed to binding.gyp.in so that $srcdir
  can be substituted with SRCDIR; removed './' from require() statements
  so that NODE_PATH can be used to point Node.js to build directory

2 files changed, 10 insertions, 5 deletions

diff --git a/Examples/lua/embed2/Makefile b/Examples/lua/embed2/Makefile
index ec22bdcae..d30ba0942 100644
--- a/Examples/lua/embed2/Makefile
+++ b/Examples/lua/embed2/Makefile
@@ -9,12 +9,12 @@ LIBS       = -lm
 # this is a little different to normal as we have our own special interpreter
 # which we want to static link
 check: build
-	$(MAKE) -f $(TOP)/Makefile TARGET='$(TARGET)' lua_embed_run
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' TARGET='$(TARGET)' lua_embed_run
 
 build:
-	$(MAKE) -f $(TOP)/Makefile $(SWIGLIB) SRCS='$(SRCS)' SWIG='$(SWIG)' \
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' $(SWIGLIB) SRCS='$(SRCS)' SWIG='$(SWIG)' \
 	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' LIBS='$(LIBS)' INTERFACE='example.i' LUA_INTERP='$(LUA_INTERP)' lua_static
 
 clean:
-	$(MAKE) -f $(TOP)/Makefile lua_clean
+	$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' lua_clean
 	rm -f $(TARGET)
diff --git a/Examples/lua/embed2/embed2.c b/Examples/lua/embed2/embed2.c
index 100a1fb33..7b2ca9b67 100644
--- a/Examples/lua/embed2/embed2.c
+++ b/Examples/lua/embed2/embed2.c
@@ -24,6 +24,7 @@ We will be using the luaL_dostring()/lua_dostring() function to call into lua
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include <lua.h>
 #include <lauxlib.h>
@@ -189,9 +190,13 @@ int main(int argc,char* argv[]) {
   luaopen_example(L);
   printf("[C] all looks ok\n");
   printf("\n");
-  printf("[C] let's load the file 'runme.lua'\n");
+  if (argc != 2 || argv[1] == NULL || strlen(argv[1]) == 0) {
+    printf("[C] ERROR: no lua file given on command line\n");
+    exit(3);
+  }
+  printf("[C] let's load the file '%s'\n", argv[1]);
   printf("[C] any lua code in this file will be executed\n");
-  if (luaL_loadfile(L, "runme.lua") || lua_pcall(L, 0, 0, 0)) {
+  if (luaL_loadfile(L, argv[1]) || lua_pcall(L, 0, 0, 0)) {
     printf("[C] ERROR: cannot run lua file: %s",lua_tostring(L, -1));
     exit(3);
   }