Index: .fossil-settings/ignore-glob
==================================================================
--- .fossil-settings/ignore-glob
+++ .fossil-settings/ignore-glob
@@ -1,5 +1,6 @@
 tuapi.so
 libtuapi.a
 tuapi.o
 tuapi.tcl.h
 pkgIndex.tcl
+compile_commands.json

Index: build-dyn.sh
==================================================================
--- build-dyn.sh
+++ build-dyn.sh
@@ -1,6 +1,19 @@
-# /bin/bash
+#! /usr/bin/env bash
+
+bashArrayToJSON() (
+	args=("$@")
+
+	jq -M -r -n -c --args '$ARGS.positional' --args -- "${args[@]}"
+)
+
+bashStringToJSON() (
+	string="$1"
+
+	eval "tmpArray=($string)"
+	bashArrayToJSON "${tmpArray[@]}"
+)
 
 # Perform common build options
 . ./build-common.sh
 
 # Compile using the same options as Tcl
@@ -9,8 +22,34 @@
 fi
 
 . "${TCLCONFIGSH}"
 
 echo "${TCL_CC} -ggdb3 -fPIC -DPIC -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} -shared -rdynamic -o tuapi.so tuapi.c ${TCL_STUB_LIB_SPEC}"
-eval ${TCL_CC} -ggdb3 -fPIC -DPIC -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} -shared -rdynamic -o tuapi.so tuapi.c ${TCL_STUB_LIB_SPEC}
+
+cat << _EOF_ > compile_commands.json.new
+[
+	{
+		"directory": "$(pwd)",
+		"file": "tuapi.c",
+		"arguments": [
+			"$(echo "${TCL_CC}" | sed 's@ @", "@g')",
+			"-ggdb3",
+			"-fPIC",
+			"-DPIC",
+			"-Wall",
+			"-DUSE_TCL_STUBS=1",
+			$(bashStringToJSON "${TCL_DEFS}" | sed 's@^\[@@;s@\]$@@'),
+			$(bashStringToJSON "${TCL_INCLUDE_SPEC}" | sed 's@^\[@@;s@\]$@@'),
+			"-shared",
+			"-rdynamic",
+			"-o",
+			"tuapi.so",
+			"tuapi.c"
+		]
+	}
+]
+_EOF_
+
+eval ${TCL_CC} -ggdb3 -fPIC -DPIC -Wall -DUSE_TCL_STUBS=1 ${TCL_DEFS} ${TCL_INCLUDE_SPEC} -shared -rdynamic -o tuapi.so tuapi.c ${TCL_STUB_LIB_SPEC} || exit 1
+mv compile_commands.json.new compile_commands.json
 
 echo 'package ifneeded tuapi '"${tuapi_version}"' [list load [file join $dir tuapi.so]]' > pkgIndex.tcl