Add support to send C coverage. Don't cache. Move hex plugin to Action

configure.ac

@@ -0,0 +1,43 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ(2.53)
+AC_PACKAGE_VERSION(1.0.0)
+AC_INIT(sqlite3, 1.0.0, [], [])
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_MAKE_SET
+
+if test "x$GCC" = "xyes"; then
+    CFLAGS="$CFLAGS -Wall"
+fi
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+
+# Checks for library functions.
+AC_FUNC_MALLOC
+AC_HEADER_STDC
+
+# Checks Erlang runtime and compiler
+AC_ERLANG_NEED_ERL
+AC_ERLANG_NEED_ERLC
+
+# Checks and sets ERLANG_ROOT_DIR and ERLANG_LIB_DIR variable
+# AC_ERLANG_SUBST_ROOT_DIR
+# AC_ERLANG_SUBST_LIB_DIR
+
+AC_ARG_ENABLE(gcov,
+[AC_HELP_STRING([--enable-gcov], [compile with gcov enabled (default: no)])],
+[case "${enableval}" in
+  yes) gcov=true ;;
+  no)  gcov=false ;;
+  *) AC_MSG_ERROR(bad value ${enableval} for --enable-gcov) ;;
+esac],[gcov=false])
+
+AC_SUBST(gcov)
+
+AC_CONFIG_FILES([vars.config])
+
+AC_OUTPUT