From 8251fa1315dfe27090430cca36978990855907b0 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Thu, 29 Mar 2012 02:13:33 +0900
Subject: [PATCH] Made OpenSSL not mandatory. Don't build examples if OpenSSL
 is not found.

Spdylay library itself does not depend on OpenSSL. The example programs
in examples directory do. Spdylay library should be built without
OpenSSL.
---
 configure.ac         | 13 ++++++++++++-
 examples/Makefile.am |  4 ++++
 tests/Makefile.am    |  8 +++++++-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index abd64af7..bb47bfab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -88,7 +88,16 @@ fi
 AM_CONDITIONAL([HAVE_CUNIT], [ test "x${have_cunit}" = "xyes" ])
 
 # openssl (for examples)
-PKG_CHECK_MODULES([OPENSSL], [openssl >= 1.0.1])
+PKG_CHECK_MODULES([OPENSSL], [openssl >= 1.0.1],
+                  [have_openssl=yes], [have_openssl=no])
+if test "x${have_openssl}" = "xno"; then
+  AC_MSG_NOTICE($OPENSSL_PKG_ERRORS)
+  AC_MSG_NOTICE([The example programs will not be built.])
+fi
+
+# The example programs depend on OpenSSL
+enable_examples=$have_openssl
+AM_CONDITIONAL([ENABLE_EXAMPLES], [ test "x${enable_examples}" = "xyes" ])
 
 # Checks for header files.
 AC_CHECK_HEADERS([ \
@@ -152,4 +161,6 @@ AC_MSG_NOTICE([summary of build options:
     CFlags:         ${CFLAGS}
     Library types:  Shared=${enable_shared}, Static=${enable_static}
     CUnit:          ${have_cunit}
+    OpenSSL:        ${have_openssl}
+    Examples:       ${enable_examples}
 ])
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 8e2f5ec2..6b135c09 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -21,6 +21,8 @@
 # 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
+
 AM_CFLAGS = -Wall
 AM_CPPFLAGS = -Wall -I$(srcdir)/../lib/includes -I$(builddir)/../lib/includes \
 	@OPENSSL_CFLAGS@ @DEFS@
@@ -63,3 +65,5 @@ spdynative_SOURCES = ${HELPER_OBJECTS} ${HELPER_HFILES} \
 	${SPDY_SERVER_OBJECTS} ${SPDY_SERVER_HFILES} \
 	spdy.h spdynative.cc
 endif # HAVE_STDCXX_11
+
+endif # ENABLE_EXAMPLES
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6b88052e..03e19045 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -40,6 +40,12 @@ main_LDFLAGS = -static @CUNIT_LIBS@
 AM_CFLAGS = -Wall -g -O2 -I${top_srcdir}/lib -I${top_srcdir}/lib/includes -I${top_builddir}/lib/includes \
 	@CUNIT_CFLAGS@ @DEFS@
 
-TESTS = main end_to_end.py
+TESTS = main
+
+if ENABLE_EXAMPLES
+
+TESTS += end_to_end.py
+
+endif # ENABLE_EXAMPLES
 
 endif # HAVE_CUNIT