From a4d552f93c2ab129b82405cb45b7e2324a67cbd7 Mon Sep 17 00:00:00 2001
From: Joe Mistachkin <joe@mistachkin.com>
Date: Tue, 13 Nov 2012 19:59:14 +0000
Subject: also search for the library directory (init.tcl, encodings, etc)
 relative to the build directory associated with the source checkout.

---
 ChangeLog        |  6 ++++++
 win/tclWinInit.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 69 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index fb97890..ee34c44 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2012-11-13  Joe Mistachkin  <joe@mistachkin.com>
+
+	* win/tclWinInit.c: also search for the library directory (init.tcl,
+	encodings, etc) relative to the build directory associated with the
+	source checkout.
+
 2012-11-09  Don Porter  <dgp@users.sourceforge.net>
 
 	*** 8.5.13 TAGGED FOR RELEASE ***
diff --git a/win/tclWinInit.c b/win/tclWinInit.c
index d80fa28..5baf020 100644
--- a/win/tclWinInit.c
+++ b/win/tclWinInit.c
@@ -101,6 +101,10 @@ static TclInitProcessGlobalValueProc	InitializeDefaultLibraryDir;
 static ProcessGlobalValue defaultLibraryDir =
 	{0, 0, NULL, NULL, InitializeDefaultLibraryDir, NULL, NULL};
 
+static TclInitProcessGlobalValueProc	InitializeSourceLibraryDir;
+static ProcessGlobalValue sourceLibraryDir =
+	{0, 0, NULL, NULL, InitializeSourceLibraryDir, NULL, NULL};
+
 static void		AppendEnvironment(Tcl_Obj *listPtr, CONST char *lib);
 static int		ToUtf(CONST WCHAR *wSrc, char *dst);
 
@@ -175,7 +179,7 @@ TclpInitLibraryPath(
     int *lengthPtr,
     Tcl_Encoding *encodingPtr)
 {
-#define LIBRARY_SIZE	    32
+#define LIBRARY_SIZE	    64
     Tcl_Obj *pathPtr;
     char installLib[LIBRARY_SIZE];
     char *bytes;
@@ -206,6 +210,13 @@ TclpInitLibraryPath(
     Tcl_ListObjAppendElement(NULL, pathPtr,
 	    TclGetProcessGlobalValue(&defaultLibraryDir));
 
+    /*
+     * Look for the library in its source checkout location.
+     */
+
+    Tcl_ListObjAppendElement(NULL, pathPtr,
+	    TclGetProcessGlobalValue(&sourceLibraryDir));
+
     *encodingPtr = NULL;
     bytes = Tcl_GetStringFromObj(pathPtr, lengthPtr);
     *valuePtr = ckalloc((unsigned int)(*lengthPtr)+1);
@@ -355,6 +366,57 @@ InitializeDefaultLibraryDir(
     TclWinNoBackslash(name);
     sprintf(end + 1, "lib/tcl%s", TCL_VERSION);
     *lengthPtr = strlen(name);
+    *valuePtr = ckalloc(*lengthPtr + 1);
+    *encodingPtr = NULL;
+    memcpy(*valuePtr, name, (size_t) *lengthPtr + 1);
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * InitializeSourceLibraryDir --
+ *
+ *	Locate the Tcl script library default location relative to the
+ *	location of the Tcl DLL as it exists in the build output directory
+ *	associated with the source checkout.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static void
+InitializeSourceLibraryDir(
+    char **valuePtr,
+    int *lengthPtr,
+    Tcl_Encoding *encodingPtr)
+{
+    HMODULE hModule = TclWinGetTclInstance();
+    WCHAR wName[MAX_PATH + LIBRARY_SIZE];
+    char name[(MAX_PATH + LIBRARY_SIZE) * TCL_UTF_MAX];
+    char *end, *p;
+
+    if (GetModuleFileNameW(hModule, wName, MAX_PATH) == 0) {
+	GetModuleFileNameA(hModule, name, MAX_PATH);
+    } else {
+	ToUtf(wName, name);
+    }
+
+    end = strrchr(name, '\\');
+    *end = '\0';
+    p = strrchr(name, '\\');
+    if (p != NULL) {
+	end = p;
+    }
+    *end = '\\';
+
+    TclWinNoBackslash(name);
+    sprintf(end + 1, "../library");
+    *lengthPtr = strlen(name);
     *valuePtr = ckalloc((unsigned int) *lengthPtr + 1);
     *encodingPtr = NULL;
     memcpy(*valuePtr, name, (size_t) *lengthPtr + 1);
-- 
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