buildroot/package/libnfc/libnfc-build-systems-make-example-build-optional.patch

From 40a4871b171293d98acb40cf54be9ee9b78a3244 Mon Sep 17 00:00:00 2001
From: Samuel Martin <s.martin49@gmail.com>
Date: Wed, 6 Jun 2012 00:49:25 +0200
Subject: [PATCH 1/1] build systems: make example build optional

This patch makes example build optional for both cmake and autotools build
systems.

In order to keep the former behavior, example build is enabled by default.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dd7904d..0e35229 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,6 +27,7 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/incl
 SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")
 
 # Options
+SET(BUILD_EXAMPLES ON CACHE BOOL "Build examples")
 SET(LIBNFC_DEBUG_OUTPUT OFF CACHE BOOL "Debug output of communication with the NFC chip")
 IF(LIBNFC_DEBUG_OUTPUT)
   ADD_DEFINITIONS(-DDEBUG -g3)
@@ -84,7 +85,7 @@ IF(NOT WIN32)
   ENDIF(LIBNFC_DRIVER_ACR122)
   # CMake lists are separated by a semi colon, replace with colon
   STRING(REPLACE ";" "," PKG_CONFIG_REQUIRES "${PKG_REQ}")
-  CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/libnfc.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libnfc.pc @ONLY) 
+  CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/libnfc.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libnfc.pc @ONLY)
   INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/libnfc.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 ENDIF(NOT WIN32)
 
@@ -101,7 +102,10 @@ ENDIF(LIBUSB_INCLUDE_DIRS)
 ADD_SUBDIRECTORY(libnfc)
 ADD_SUBDIRECTORY(include)
 ADD_SUBDIRECTORY(utils)
-ADD_SUBDIRECTORY(examples)
+
+IF(BUILD_EXAMPLES)
+  ADD_SUBDIRECTORY(examples)
+ENDIF(BUILD_EXAMPLES)
 
 # Binary Package
 IF(WIN32)
diff --git a/Makefile.am b/Makefile.am
index 3671cb6..59fd75a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,13 @@ ACLOCAL_AMFLAGS = -I m4
 
 AM_CFLAGS = $(LIBNFC_CFLAGS)
 
-SUBDIRS = libnfc utils examples include contrib cmake test
+SUBDIRS = libnfc utils
+
+if EXAMPLE_ENABLED
+SUBDIRS += examples
+endif
+
+SUBDIRS += include contrib cmake test
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libnfc.pc
diff --git a/configure.ac b/configure.ac
index 0a222a8..6988164 100644
--- a/configure.ac
+++ b/configure.ac
@@ -111,6 +111,14 @@ then
 fi
 AM_CONDITIONAL(DOC_ENABLED, [test x"$enable_doc" = xyes])
 
+# Example build (default: yes)
+AC_ARG_ENABLE([example],AS_HELP_STRING([--enable-example],[Enable example build.]),[enable_example=$enableval],[enable_example="yes"])
+
+AC_MSG_CHECKING(for example build)
+AC_MSG_RESULT($enable_example)
+
+AM_CONDITIONAL(EXAMPLE_ENABLED, [test x"$enable_example" = xyes])
+
 # Dependencies
 PKG_CONFIG_REQUIRES=""
 
@@ -129,7 +137,11 @@ if test x$ac_cv_with_cutter = xyes -a x$ac_cv_use_cutter = xno; then
 fi
 AM_CONDITIONAL([WITH_CUTTER], [test "$ac_cv_use_cutter" != "no"])
 
+
+if test x"$enable_example" = "xyes"
+then
 AC_CHECK_READLINE
+fi
 
 # Help us to write great code ;-)
 CFLAGS="$CFLAGS -Wall -pedantic -Wextra"
-- 
1.7.10.3