Simpler way to set JANET_PATH at compile time.

Makefile

@@ -35,8 +35,7 @@ MANPATH?=$(PREFIX)/share/man/man1/
 DEBUGGER=gdb
 
 CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -O2 -fvisibility=hidden \
-	   -DJANET_BUILD=$(JANET_BUILD) \
-	   -DJANET_DEFAULT_PATH="\"$(JANET_PATH)\""
+	   -DJANET_BUILD=$(JANET_BUILD)
 
 UNAME:=$(shell uname -s)
 ifeq ($(UNAME), Darwin)
@@ -78,7 +77,7 @@ build/janet_boot: $(JANET_BOOT_OBJECTS)
 
 # Now the reason we bootstrap in the first place
 build/core_image.c: build/janet_boot
-	build/janet_boot
+	JANET_PATH=$(JANET_PATH) build/janet_boot
 
 ##########################################################
 ##### The main interpreter program and shared object #####

build_win.bat

@@ -57,6 +57,7 @@ for %%f in (src\boot\*.c) do (
 )
 %JANET_LINK% /out:build\janet_boot.exe build\boot\*.obj
 @if errorlevel 1 goto :BUILDFAIL
+set JANET_PATH="C:/Janet/Library"
 build\janet_boot
 
 @rem Build the core image

src/core/core.janet

@@ -1601,13 +1601,9 @@ value, one key will be ignored."
 
 (var module/*syspath*
   "The path where globally installed libraries are located.
-  The default value is the environment variable JANET_PATH,
-  and if that is not set /usr/local/lib/janet on linux/posix, and
-  on Windows the default is the empty string."
-  (or (os/getenv "JANET_PATH")
-      (if (= :windows (os/which)) "" JANET_DEFAULT_PATH)))
-
-(put _env 'JANET_DEFAULT_PATH nil)
+  The default is set at build time and is /usr/local/lib/janet on linux/posix, and
+  on Windows is C:/Janet/Library."
+  (or (os/getenv "JANET_PATH") ""))
 
 (defn- fexists [path]
   (def f (file/open path))

src/core/corelib.c

@@ -761,8 +761,6 @@ JanetTable *janet_core_env(void) {
 #endif
 
 #ifdef JANET_BOOTSTRAP
-    /* Let the bootstrap program know where to set the default path */
-    janet_core_def(env, "JANET_DEFAULT_PATH", janet_cstringv(JANET_DEFAULT_PATH), NULL);
     /* Run bootstrap source */
     janet_dobytes(env, janet_gen_core, janet_gen_core_size, "core.janet", NULL);
 #else