Add configure options for debug and PIE support

bootstrap-configure

@@ -6,6 +6,7 @@ fi
 
 ./bootstrap && \
     ./configure --enable-maintainer-mode \
+		--enable-debug \
 		--prefix=/usr \
 		--mandir=/usr/share/man \
 		--sysconfdir=/etc

configure.ac

@@ -16,4 +16,21 @@ AC_PROG_CC
 AC_PROG_CC_PIE
 AC_PROG_INSTALL
 
+AC_ARG_ENABLE(debug, AC_HELP_STRING([--enable-debug],
+			[enable compiling with debugging information]), [
+	if (test "${enableval}" = "yes" &&
+				test "${ac_cv_prog_cc_g}" = "yes"); then
+		CFLAGS="$CFLAGS -g -O0"
+	fi
+])
+
+AC_ARG_ENABLE(pie, AC_HELP_STRING([--enable-pie],
+			[enable position independent executables flag]), [
+	if (test "${enableval}" = "yes" &&
+				test "${ac_cv_prog_cc_pie}" = "yes"); then
+		CFLAGS="$CFLAGS -fPIE"
+		LDFLAGS="$LDFLAGS -pie"
+	fi
+])
+
 AC_OUTPUT(Makefile)