libnfc: make example build optional

	  Public platform independent Near Field Communication (NFC) library.

	  http://www.libnfc.org/

config BR2_PACKAGE_LIBNFC_EXAMPLES

	bool "build libnfc examples"

	depends on BR2_PACKAGE_LIBNFC

	select BR2_PACKAGE_READLINE

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

LIBNFC_VERSION = 1.5.1

LIBNFC_SITE = http://libnfc.googlecode.com/files/

LIBNFC_SOURCE = libnfc-$(LIBNFC_VERSION).tar.gz

LIBNFC_AUTORECONF = YES

LIBNFC_INSTALL_STAGING = YES

LIBNFC_DEPENDENCIES = host-pkg-config libusb libusb-compat

# N.B. The acr122 driver requires pcsc-lite.

LIBNFC_CONF_OPT = --with-drivers=arygon,pn53x_usb

ifeq ($(BR2_PACKAGE_LIBNFC_EXAMPLES),y)

LIBNFC_CONF_OPT += --enable-example

LIBNFC_DEPENDENCIES += readline

else

LIBNFC_CONF_OPT += --disable-example

endif

$(eval $(call AUTOTARGETS))