package/libv4l: allow build of v4l2 utilities on noMMU platforms

This commit removes the dependencies on MMU and dynamic libraries.

In order to build v4l2 utilities such as compliancy tools like
v4l2-compliance or cec-compliance, v4-utils can now be built without
dynamic libraries support.

In that case the v4l-utils parts which depends on dynamic library
support are not built:
 - libv4l & libv4lconvert libraries
 - libv4l plugins
 - rds-ctl utility
 - contrib test utilities

The rest of the utilities are built.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

1 files changed, 155 insertions, 0 deletions

diff --git a/package/libv4l/0007-configure.ac-add-disable-libv4l-option.patch b/package/libv4l/0007-configure.ac-add-disable-libv4l-option.patch
new file mode 100644
index 0000000000..fed2837f01
--- /dev/null
+++ b/package/libv4l/0007-configure.ac-add-disable-libv4l-option.patch
@@ -0,0 +1,155 @@
+From 702722a43ee6472993fabdd810272d3599064866 Mon Sep 17 00:00:00 2001
+From: Hugues Fruchet <hugues.fruchet@st.com>
+Date: Wed, 17 May 2017 10:03:11 +0200
+Subject: [PATCH] configure.ac: add --disable-libv4l option
+
+Add an option to disable libv4l libraries and plugins compilation.
+If system is not supporting dynamic shared libraries, this option
+is automatically set.
+dlopen() is no more a mandatory dependency (warning is kept).
+lib/ and contrib/ folders are no more built with this option set
+because of libv4l dependency.
+utils/ folder is still built with this options set but without
+rds-ctl because of its libv4l dependency.
+v4l2-compliance and v4l2-ctl are also built but without any links
+on libv4l and libv4lconvert libraries.
+
+Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
+Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
+---
+ Makefile.am                       | 11 +++++++++--
+ configure.ac                      | 12 +++++++++++-
+ utils/Makefile.am                 |  6 +++++-
+ utils/v4l2-compliance/Makefile.am |  4 ++++
+ utils/v4l2-ctl/Makefile.am        |  4 ++++
+ 5 files changed, 33 insertions(+), 4 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index e603472..07c3ef8 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -1,10 +1,17 @@
+ AUTOMAKE_OPTIONS = foreign
+ ACLOCAL_AMFLAGS = -I m4
+ 
+-SUBDIRS = v4l-utils-po libdvbv5-po lib
++SUBDIRS = v4l-utils-po libdvbv5-po
++
++if WITH_LIBV4L
++SUBDIRS += lib
++endif
+ 
+ if WITH_V4LUTILS
+-SUBDIRS += utils contrib
++SUBDIRS += utils
++if WITH_LIBV4L
++SUBDIRS += contrib
++endif
+ endif
+ 
+ EXTRA_DIST = android-config.h bootstrap.sh doxygen_libdvbv5.cfg include COPYING.libv4l \
+diff --git a/configure.ac b/configure.ac
+index 8e536cc..b9fc59a 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -285,7 +285,7 @@ dl_saved_libs=$LIBS
+   AC_SEARCH_LIBS([dlopen],
+                  [dl],
+                  [test "$ac_cv_search_dlopen" = "none required" || DLOPEN_LIBS=$ac_cv_search_dlopen],
+-                 [AC_MSG_ERROR([unable to find the dlopen() function])])
++                 [AC_MSG_WARN([unable to find the dlopen() function])])
+   AC_SUBST([DLOPEN_LIBS])
+ LIBS=$dl_saved_libs
+ 
+@@ -371,6 +371,14 @@ AC_ARG_ENABLE(libdvbv5,
+    esac]
+ )
+ 
++AC_ARG_ENABLE(libv4l,
++  AS_HELP_STRING([--disable-libv4l], [disable libv4l compilation]),
++  [case "${enableval}" in
++     yes | no ) ;;
++     *) AC_MSG_ERROR(bad value ${enableval} for --disable-libv4l) ;;
++   esac]
++)
++
+ AC_ARG_ENABLE(dyn-libv4l,
+   AS_HELP_STRING([--disable-dyn-libv4l], [disable dynamic libv4l support]),
+   [case "${enableval}" in
+@@ -428,6 +436,7 @@ AM_CONDITIONAL([WITH_LIBDVBV5],     [test x$enable_libdvbv5  != xno -a x$have_li
+ AM_CONDITIONAL([WITH_DVBV5_REMOTE], [test x$enable_libdvbv5  != xno -a x$have_libudev = xyes -a x$have_pthread = xyes])
+ 
+ AM_CONDITIONAL([WITH_DYN_LIBV4L],   [test x$enable_dyn_libv4l != xno])
++AM_CONDITIONAL([WITH_LIBV4L],       [test x$enable_libv4l    != xno -a x$enable_shared != xno])
+ AM_CONDITIONAL([WITH_V4LUTILS],	    [test x$enable_v4l_utils != xno -a x$linux_os = xyes])
+ AM_CONDITIONAL([WITH_QV4L2],	    [test x${qt_pkgconfig} = xtrue -a x$enable_qv4l2 != xno])
+ AM_CONDITIONAL([WITH_V4L_PLUGINS],  [test x$enable_dyn_libv4l != xno -a x$enable_shared != xno])
+@@ -455,6 +464,7 @@ AM_COND_IF([WITH_LIBDVBV5], [USE_LIBDVBV5="yes"], [USE_LIBDVBV5="no"])
+ AM_COND_IF([WITH_DVBV5_REMOTE], [USE_DVBV5_REMOTE="yes"
+ 				 AC_DEFINE([HAVE_DVBV5_REMOTE], [1], [Usage of DVBv5 remote enabled])],
+ 			        [USE_DVBV5_REMOTE="no"])
++AM_COND_IF([WITH_LIBV4L], [USE_LIBV4L="yes"], [USE_LIBV4L="no"])
+ AM_COND_IF([WITH_DYN_LIBV4L], [USE_DYN_LIBV4L="yes"], [USE_DYN_LIBV4L="no"])
+ AM_COND_IF([WITH_V4LUTILS], [USE_V4LUTILS="yes"], [USE_V4LUTILS="no"])
+ AM_COND_IF([WITH_QV4L2], [USE_QV4L2="yes"], [USE_QV4L2="no"])
+diff --git a/utils/Makefile.am b/utils/Makefile.am
+index d7708cc..ce710c2 100644
+--- a/utils/Makefile.am
++++ b/utils/Makefile.am
+@@ -13,8 +13,12 @@ SUBDIRS = \
+ 	v4l2-sysfs-path \
+ 	cec-ctl \
+ 	cec-compliance \
+-	cec-follower \
++	cec-follower
++
++if WITH_LIBV4L
++SUBDIRS += \
+ 	rds-ctl
++endif
+ 
+ if WITH_LIBDVBV5
+ SUBDIRS += \
+diff --git a/utils/v4l2-compliance/Makefile.am b/utils/v4l2-compliance/Makefile.am
+index c2b5919..0240a50 100644
+--- a/utils/v4l2-compliance/Makefile.am
++++ b/utils/v4l2-compliance/Makefile.am
+@@ -7,12 +7,16 @@ v4l2_compliance_SOURCES = v4l2-compliance.cpp v4l2-test-debug.cpp v4l2-test-inpu
+ 	v4l2-test-codecs.cpp v4l2-test-colors.cpp v4l2-compliance.h
+ v4l2_compliance_CPPFLAGS = -I../common
+ 
++if WITH_LIBV4L
+ if WITH_V4L2_COMPLIANCE_LIBV4L
+ v4l2_compliance_LDADD = ../../lib/libv4l2/libv4l2.la ../../lib/libv4lconvert/libv4lconvert.la -lrt -lpthread
+ else
+ v4l2_compliance_LDADD = -lrt -lpthread
+ DEFS += -DNO_LIBV4L2
+ endif
++else
++DEFS += -DNO_LIBV4L2
++endif
+ 
+ EXTRA_DIST = Android.mk fixme.txt v4l2-compliance.1
+ 
+diff --git a/utils/v4l2-ctl/Makefile.am b/utils/v4l2-ctl/Makefile.am
+index 955647d..4475aed 100644
+--- a/utils/v4l2-ctl/Makefile.am
++++ b/utils/v4l2-ctl/Makefile.am
+@@ -9,10 +9,14 @@ v4l2_ctl_SOURCES = v4l2-ctl.cpp v4l2-ctl.h v4l2-ctl-common.cpp v4l2-ctl-tuner.cp
+ 	v4l2-tpg-colors.c v4l2-tpg-core.c v4l-stream.c
+ v4l2_ctl_CPPFLAGS = -I../common
+ 
++if WITH_LIBV4L
+ if WITH_V4L2_CTL_LIBV4L
+ v4l2_ctl_LDADD = ../../lib/libv4l2/libv4l2.la ../../lib/libv4lconvert/libv4lconvert.la -lrt -lpthread
+ else
+ DEFS += -DNO_LIBV4L2
+ endif
++else
++DEFS += -DNO_LIBV4L2
++endif
+ 
+ EXTRA_DIST = Android.mk v4l2-ctl.1
+-- 
+1.9.1
+