Add --enable-src configure option

When --enable-src is given, the programs in src directory will be
built. If --disable-src is given, those programs will not be built. If
none of them are given, --enable-src is assumed.

configure.ac

@@ -45,6 +45,11 @@ AC_ARG_ENABLE([maintainer-mode],
                     [Turn on compile time warnings])],
     [maintainer_mode=$withval], [maintainer_mode=no])
 
+AC_ARG_ENABLE([src],
+    [AS_HELP_STRING([--enable-src],
+                    [Build installable SPDY client/server programs in src])],
+    [request_src=$withval], [request_src=yes])
+
 AC_ARG_ENABLE([examples],
     [AS_HELP_STRING([--enable-examples],
                     [Build example programs])],
@@ -128,6 +133,15 @@ if test "x${have_libxml2}" = "xyes"; then
 fi
 AM_CONDITIONAL([HAVE_LIBXML2], [ test "x${have_libxml2}" = "xyes" ])
 
+# The src programs depend on OpenSSL
+enable_src=no
+if test "x${request_src}" = "xyes" &&
+   test "x${have_openssl}" = "xyes"; then
+    enable_src=yes
+fi
+
+AM_CONDITIONAL([ENABLE_SRC], [ test "x${enable_src}" = "xyes" ])
+
 # The example programs depend on OpenSSL
 enable_examples=no
 if test "x${request_examples}" = "xyes" &&
@@ -255,5 +269,6 @@ AC_MSG_NOTICE([summary of build options:
     OpenSSL:        ${have_openssl}
     Libxml2:        ${have_libxml2}
     Libevent(SSL):  ${have_libevent_openssl}
+    Src:            ${enable_src}
     Examples:       ${enable_examples}
 ])

src/Makefile.am

@@ -21,7 +21,7 @@
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-if ENABLE_EXAMPLES
+if ENABLE_SRC
 
 AM_CFLAGS = -Wall
 AM_CPPFLAGS = -Wall -I$(srcdir)/../lib/includes -I$(builddir)/../lib/includes \
@@ -92,4 +92,4 @@ shrpx_SOURCES = ${HELPER_OBJECTS} ${HELPER_HFILES} \
 	http-parser/http_parser.c http-parser/http_parser.h
 endif # HAVE_LIBEVENT_OPENSSL
 
-endif # ENABLE_EXAMPLES
+endif # ENABLE_SRC

tests/Makefile.am

@@ -54,11 +54,11 @@ AM_CFLAGS = -Wall -I${top_srcdir}/lib -I${top_srcdir}/lib/includes -I${top_build
 
 TESTS = main failmalloc
 
-if ENABLE_EXAMPLES
+if ENABLE_SRC
 
 EXTRA_DIST = end_to_end.py
 TESTS += end_to_end.py
 
-endif # ENABLE_EXAMPLES
+endif # ENABLE_SRC
 
 endif # HAVE_CUNIT