updated README.md and the rpm spec file

README.md

@@ -182,6 +182,44 @@ $ gcc -Wall -O2 -o hawk02 hawk02.c -lhawk
 
 The actual command may vary depending on the compiler used and the `configure` options used.
 
+## Embedding Signal Handling
+
+Signal handling is provided via a callback hook. The core library does not install OS-level signal handlers; the embedding application must do that and notify the runtime.
+
+- Register a runtime callback with `hawk_rtx_pushecb()` and fill `hawk_rtx_ecb_t.sigset` (type `hawk_rtx_ecb_sigset_t`).
+- Your callback is invoked when `sys::signal()` sets or clears a handler; use it to install or reset the OS signal handler.
+- When the OS handler runs, call `hawk_rtx_raisesig()` on the target runtime.
+
+Example:
+
+```c
+static hawk_rtx_t* g_rtx = HAWK_NULL;
+
+static void on_os_signal (int sig)
+{
+	if (g_rtx) hawk_rtx_raisesig(g_rtx, sig);
+}
+
+static void on_sigset (hawk_rtx_t* rtx, int sig, hawk_fun_t* fun)
+{
+	if (fun)
+	{
+		g_rtx = rtx;
+		signal(sig, on_os_signal);
+	}
+	else
+	{
+		if (g_rtx == rtx) g_rtx = HAWK_NULL;
+		signal(sig, SIG_DFL);
+	}
+}
+
+hawk_rtx_ecb_t ecb;
+memset(&ecb, 0, HAWK_SIZEOF(ecb));
+ecb.sigset = on_sigset;
+hawk_rtx_pushecb(rtx, &ecb);
+```
+
 # Embedding Hawk in C++ Applications
 
 Hawk can also be embedded in C++ applications. Here's an example:
@@ -1002,9 +1040,11 @@ The `sys` module provides various functions concerning the underlying operation
 - sys::opendir
 - sys::openfd
 - sys::pipe
+- sys::raise
 - sys::read
 - sys::readdir
 - sys::setttime
+- sys::signal
 - sys::sleep
 - sys::strftime
 - sys::system

pkgs/hawk.spec.in

@@ -5,11 +5,11 @@
 %define __brp_remove_la_files /bin/true
 %define source_date_epoch_from_changelog 0
 
-%define enable_mod_ffi 1
-%define enable_mod_memc 0
-%define enable_mod_mysql 1
-%define enable_mod_sqlite 1
-%define enable_mod_uci 0
+%{!?enable_mod_ffi:%define enable_mod_ffi 1}
+%{!?enable_mod_memc:%define enable_mod_memc 0}
+%{!?enable_mod_mysql:%define enable_mod_mysql 1}
+%{!?enable_mod_sqlite:%define enable_mod_sqlite 1}
+%{!?enable_mod_uci:%define enable_mod_uci 0}
 
 Summary: Hawk Interpreter
 Name: @PACKAGE_NAME@
@@ -26,20 +26,31 @@ Requires: %{name}-libs%{?_isa}
 ## prep_cif_var() available since 3.0.11
 BuildRequires: libffi-devel%{?_isa} >= 3.0.11
 %endif
+
 %if %{enable_mod_memc}
 BuildRequires: libmemcached-devel%{?_isa} >= 1.0.18
 %endif
+
 %if %{enable_mod_mysql}
-##BuildRequires: mariadb-connector-c-devel%{?_isa}
+
+%if 0%{?fedora} > 22
+BuildRequires: mariadb-connector-c-devel%{?_isa}
+%else
+
 %if 0%{?suse_version} > 0
 BuildRequires: libmariadb-devel%{?_isa}
 %else
 BuildRequires: mysql-devel%{?_isa}
 %endif
+
 %endif
+
+%endif
+
 %if %{enable_mod_sqlite}
 BuildRequires: sqlite-devel%{?_isa}
 %endif
+
 %if %{enable_mod_uci}
 BuildRequires: libuci-devel%{?_isa}
 %endif
@@ -83,8 +94,19 @@ This package contains the memc module file for Hawk.
 Summary: Hawk mysql module
 Group: System Environment/Libraries
 Requires: %{name}-libs%{?_isa} = %{version}
+
+%if 0%{?fedora} > 22
+Requires: mariadb-connector-c%{?_isa}
+%else
+
+%if 0%{?suse_version} > 0
+Requires: libmariadb%{?_isa}
+%else
 ## tricky to specify the right mysql/mariadb client library.
-##Requires: mariadb-connector-c%{?_isa}
+Requires:
+%endif
+
+%endif
 
 %description mysql
 This package contains the mysql module file for Hawk.