Remove modules Jamfile: it doesn't work.

Add shell script for testing modules with clang.

test/module/config/clang.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+#
+# Arguments are:
+#
+# 1) A space spearated list of source files.
+# 2) A space separated list of module source files.
+# 3) The name of the executable to build.
+#
+# Environment variables used are:
+#
+# CXX - the name of the clang compiler, defaults to clang++.
+# CXXFLAGS - flags to pass to the build, defaults to "-std=c++20 -g".
+# LINKFLAGS - flags to pass to the link stage, defaults to "".
+# LIBRARIES - Additional libraries to add to the end of the link command line, defaults to "".
+#
+
+: ${CXX:="clang++"}
+: ${CXXFLAGS:="-std=c++20 -g"}
+
+module_usage=""
+
+for module_file in $2; do
+module_base="${module_file%.*}"
+$CXX $CXXFLAGS -x c++-module $module_file --precompile -o $module_base.pcm || exit 1
+
+# grab the name of the exported module from the source:
+cxx_module_name=$(grep -E "export[ ]+module[ ]+([^; ]+)" $module_file | sed -r "s/export[ ]+module[ ]+([^; ]+)[ ]*;/\1/")
+
+# Build the command line for module usage:
+module_usage="$module_usage -fmodule-file=$cxx_module_name=$module_base.pcm $module_base.pcm"
+
+done
+
+# Build the actual executable:
+$CXX $CXXFLAGS $1 $module_usage -o $3 || exit 1

test/module/test.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+#
+# Builds all of the tests in this folder using the supplied compiler-specific script in $1
+#
+
+for file in *.cpp; do
+
+CXXFLAGS="-std=c++20 -g -I ../../../.." $1 $file ../../module/regex.cxx "${file%.*}.exe" || exit 1
+
+done