diff --git a/auto.def b/auto.def
index 4d96682408..d0c7be78b7 100644
--- a/auto.def
+++ b/auto.def
@@ -175,7 +175,7 @@ if {"" eq [hwaci-bin-define install]} {
   msg-result "Cannot find install binary, so 'make install' will not work."
 }
 
-#########
+########################################################################
 # Locate a compiler for the build machine.  This compiler should
 # generate command-line programs that run on the build machine.
 #
@@ -195,7 +195,7 @@ if {"" eq [hwaci-bin-define install]} {
 define BUILD_CC [get-define CC_FOR_BUILD]
 define BUILD_CFLAGS [get-env CFLAGS {-g}]
 
-##########
+########################################################################
 # Handle --with-wasi-sdk=DIR
 #
 # This must be early because it may change the toolchain and several
@@ -244,7 +244,7 @@ if {1} {
   unset wasiSdkDir
 }; # --wasi-sdk-dir
 
-########
+########################################################################
 # Check which TCL to use as a code generator
 define CFLAGS_JIMSH {}
 puts "Looking for path-resolution function for JimTCL... "
@@ -258,11 +258,11 @@ if {[cc-check-functions realpath]} {
   puts "Cannot find realpath() or _fullpath(). Falling back to system's TCL for code generation."
 }
 
-#########
+########################################################################
 # Enable large file support (if special flags are necessary)
 cc-check-lfs
 
-#########
+########################################################################
 # Check for needed/wanted data types
 cc-check-types int8_t int16_t int32_t int64_t intptr_t \
   uint8_t uint16_t uint32_t uint64_t uintptr_t
@@ -274,7 +274,7 @@ cc-check-function-in-lib fdatasync rt
 define LDFLAGS_FDATASYNC [get-define lib_fdatasync]
 undefine lib_fdatasync
 
-#########
+########################################################################
 # Check for needed/wanted headers
 cc-check-includes \
   sys/types.h sys/stat.h dlfcn.h unistd.h \
@@ -282,6 +282,9 @@ cc-check-includes \
   string.h strings.h \
   stdint.h inttypes.h
 
+# These are optional for JimTCL:
+cc-check-includes dirent.h sys/time.h
+
 if {[cc-check-includes zlib.h] && [cc-check-function-in-lib deflate z]} {
   # TODO: port over the more sophisticated zlib search from the fossil auto.def
   define HAVE_ZLIB 1; # "-DSQLITE_HAVE_ZLIB=1"
@@ -308,6 +311,8 @@ hwaci-if-opt-truthy with-debug {
   msg-result no
 }
 
+########################################################################
+# TCL...
 define HAVE_TCL 0
 define TCLSH_CMD {exit 1}
 if {"" eq [get-define CFLAGS_JIMSH]} {
@@ -364,7 +369,6 @@ if {"" eq [get-define CFLAGS_JIMSH]} {
     # XXX fi
   }
 
-
   # XXX if test x"${use_tcl}" = "xyes"; then
   # XXX if test x"${with_tcl}" != x; then
   # XXX if test -r ${with_tcl}/tclConfig.sh; then
@@ -459,6 +463,8 @@ if {"" eq [get-define CFLAGS_JIMSH]} {
 }; # end of tcl
 
 
+########################################################################
+# Thread safety?
 msg-checking "Support threadsafe operation? "
 hwaci-if-opt-truthy threadsafe {
   msg-result yes
@@ -475,7 +481,7 @@ hwaci-if-opt-truthy threadsafe {
   define LDFLAGS_PTHREAD ""
 }
 
-##########
+########################################################################
 # Do we want to support release?
 #
 # Maintenance note: this might be irrelevant with an autosetup port,
@@ -503,7 +509,7 @@ if {0} {
   # XXX AC_SUBST ALLOWRELEASE
 }
 
-##########
+########################################################################
 # Do we want temporary databases in memory?
 #
 if {1} {
@@ -729,7 +735,7 @@ if {0} {
   # XXX BUILD_CFLAGS=$ac_temp_BUILD_CFLAGS
 }
 
-##########
+########################################################################
 # Emscripten SDK for building the web-based wasm components.
 #
 if {[hwaci-check-emsdk]} {
@@ -784,25 +790,45 @@ foreach {boolFlag featureFlag ifSetEvalThis} {
   }
 }
 
+########################################################################
+# Extend JimTCL a bit...
+if {"" ne [get-define CFLAGS_JIMSH]} {
+  foreach jimFunc {opendir fsync isascii} {
+    if {[cc-check-functions $jimFunc]} {
+      define-append CFLAGS_JIMSH -DHAVE_[string toupper $jimFunc]
+    }
+  }
+  #foreach jimDef {HAVE_UNISTD_H HAVE_DIRENT_H} {
+  #  if {[is-defined $jimDef]} {
+  #    define-append CFLAGS_JIMSH -D$jimDef
+  #  }
+  #}
+  define-append CFLAGS_JIMSH -DHAVE_LONG_LONG; # SQLite relies on long long, so we know it's available
+}; # JimTCL
+
 define ENABLE_SHARED $enable_shared
 
-if {1} {
-  # for sqlite_cfg.h
-  define PACKAGE_URL {https://sqlite.org}
-  define PACKAGE_VERSION [get-define VERSION]
-}
-
-#########
+########################################################################
 # Generate the output files.
 #
 if {1} {
   hwaci-make-from-dot-in Makefile
   hwaci-make-from-dot-in sqlite3.pc
   # hwaci-make-from-dot-in sqlite_cfg.h
+
   if {1} {
+    # for sqlite_cfg.h
+    define PACKAGE_URL {https://sqlite.org}
+    define PACKAGE_VERSION [get-define VERSION]
+  }
+  if {0} {
+    # Requires a hand-written sqlite_cfg.h.in...
     hwaci-make-from-dot-in sqlite_cfg.h
+    # vs...
   } else {
-    make-config-header -bare {SIZEOF_* HAVE_DECL_*} \
+    # Requires no input template...
+    make-config-header sqlite_cfg.h \
+      -bare {SIZEOF_* HAVE_DECL_*} \
       -auto {HAVE_* PACKAGE_*} -none *
   }
   # make-config-header sqlite_cfg.h -bare {SIZEOF_* HAVE_*} -none *
diff --git a/manifest b/manifest
index a38775c4c1..5efe4184b7 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Tweak\sbuild\sto\sfall\sback\sto\ssystem-side\stclsh\sif\swe\scannot\sfind\srealpath()\sor\s_fullpath()\sfor\sJimTCL\s(needed\sfor\ssome\sof\sthe\scode\sgenerator\sscripts\sto\swork).
-D 2024-09-27T02:35:41.157
+C General\sauto.def\scleanups,\smostly\saround\sJimTCL.\sSwap\sout\simpl\sfor\sthe\ssqlite_cfg.h\sgenerator\s-\sthis\sapproach\sis\slower-maintenance\s(requires\sno\shand-maintained\stemplate)\sbut\smay\snot\sbe\scompatible\swith\sexpectations.
+D 2024-09-27T03:04:16.754
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -14,7 +14,7 @@ F art/icon-80x90.gif 65509ce3e5f86a9cd64fe7fca2d23954199f31fe44c1e09e208c80fb83d
 F art/sqlite370.eps aa97a671332b432a54e1d74ff5e8775be34200c2
 F art/sqlite370.ico af56c1d00fee7cd4753e8631ed60703ed0fc6e90
 F art/sqlite370.jpg d512473dae7e378a67e28ff96a34da7cb331def2
-F auto.def 73d6e09e94dbe2a11c26524d2448c81a7bc5fdb52c2378396138d57ddbf058bb
+F auto.def 16cabd934d00c8c69fa28f628b5236686c5bfb9f925ce3a8a50fd1caa8c4eedd
 F autoconf/INSTALL 83e4a25da9fd053c7b3665eaaaf7919707915903
 F autoconf/Makefile.am adedc1324b6a87fdd1265ddd336d2fb7d4f36a0e77b86ea553ae7cc4ea239347
 F autoconf/Makefile.fallback 22fe523eb36dfce31e0f6349f782eb084e86a5620b2b0b4f84a2d6133f53f5ac
@@ -2233,8 +2233,8 @@ F vsixtest/vsixtest.tcl 6195aba1f12a5e10efc2b8c0009532167be5e301abe5b31385638080
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 3193b86a91d8096be68cb83133c7665129694521d7da81bf725e285c229271f7
-R c9ebfe69a4af214d35d57aa4421c3f6e
+P b31dbb9945d0ac5e22d146565443bcdc0dd1a1c83034cfb5867b2303ada2bdea
+R 559826a6b99ae3d6f2212d863a4322c6
 U stephan
-Z 2d082ca6d901dc26c8447cb73e030ab8
+Z 5d3d66ed442efd8056a05e7c3e59ac1d
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 67187e8b40..006e487e4a 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-b31dbb9945d0ac5e22d146565443bcdc0dd1a1c83034cfb5867b2303ada2bdea
+da197946dbaacedb6e74827db9b5dd195d4aaf78ad9411a14aca732ab77917c6