v4l-utils: Fix build with musl

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
(cherry picked from commit 0f55207ad2)
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-multimedia/v4l2apps/v4l-utils/0001-ir-ctl-Define-TEMP_FAILURE_RETRY-if-undefined.patch

@@ -0,0 +1,55 @@
+From e60aea50e41ae8a17672beb5859beecb66e7a305 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 14 Jul 2017 13:11:25 -0700
+Subject: [PATCH 1/3] ir-ctl: Define TEMP_FAILURE_RETRY if undefined
+
+use strndup() instead of strndupa() which is not
+universally available in C libraries
+
+Taken from AlpineLinux
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ utils/ir-ctl/ir-ctl.c | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/utils/ir-ctl/ir-ctl.c b/utils/ir-ctl/ir-ctl.c
+index bc58cee..1a44011 100644
+--- a/utils/ir-ctl/ir-ctl.c
++++ b/utils/ir-ctl/ir-ctl.c
+@@ -42,6 +42,16 @@
+ # define _(string) string
+ #endif
+ 
++/* taken from glibc unistd.h */
++#ifndef TEMP_FAILURE_RETRY
++#define TEMP_FAILURE_RETRY(expression) \
++  (__extension__                                                              \
++    ({ long int __result;                                                     \
++       do __result = (long int) (expression);                                 \
++       while (__result == -1L && errno == EINTR);                             \
++       __result; }))
++#endif
++
+ # define N_(string) string
+ 
+ 
+@@ -344,12 +354,14 @@ static struct file *read_scancode(const char *name)
+ 		return NULL;
+ 	}
+ 
+-	pstr = strndupa(name, p - name);
++	pstr = strndup(name, p - name);
+ 
+ 	if (!protocol_match(pstr, &proto)) {
+ 		fprintf(stderr, _("error: protocol '%s' not found\n"), pstr);
++		free(pstr);
+ 		return NULL;
+ 	}
++	free(pstr);
+ 
+ 	if (!strtoscancode(p + 1, &scancode)) {
+ 		fprintf(stderr, _("error: invalid scancode '%s'\n"), p + 1);
+-- 
+2.13.3
+

meta-oe/recipes-multimedia/v4l2apps/v4l-utils/0002-contrib-test-Link-mc_nextgen_test-with-libargp-if-ne.patch

@@ -0,0 +1,28 @@
+From b3acc4c6407f9553f32582a9aee6a11b5fcd1d8a Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 14 Jul 2017 13:17:19 -0700
+Subject: [PATCH 2/3] contrib/test: Link mc_nextgen_test with libargp if needed
+
+musl depends on external argp implementation e.g.
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ contrib/test/Makefile.am | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/contrib/test/Makefile.am b/contrib/test/Makefile.am
+index 4641e21..e47b948 100644
+--- a/contrib/test/Makefile.am
++++ b/contrib/test/Makefile.am
+@@ -32,7 +32,7 @@ v4l2gl_LDFLAGS = $(X11_LIBS) $(GL_LIBS) $(GLU_LIBS) $(ARGP_LIBS)
+ v4l2gl_LDADD = ../../lib/libv4l2/libv4l2.la ../../lib/libv4lconvert/libv4lconvert.la
+ 
+ mc_nextgen_test_CFLAGS = $(LIBUDEV_CFLAGS)
+-mc_nextgen_test_LDFLAGS = $(LIBUDEV_LIBS)
++mc_nextgen_test_LDFLAGS = $(ARGP_LIBS) $(LIBUDEV_LIBS)
+ 
+ 
+ ioctl_test_SOURCES = ioctl-test.c ioctl-test.h ioctl_32.h ioctl_64.h
+-- 
+2.13.3
+

meta-oe/recipes-multimedia/v4l2apps/v4l-utils/0003-v4l2-ctl-Do-not-use-getsubopt.patch

@@ -0,0 +1,49 @@
+From d04aa6866cbea57c4a81b033cd60586a9436ac6b Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 14 Jul 2017 13:20:05 -0700
+Subject: [PATCH 3/3] v4l2-ctl: Do not use getsubopt
+
+POSIX says that behavior when subopts list is empty is undefined.
+musl libs will set value to NULL which leads to crash.
+
+Taken from AlpineLinux
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ utils/v4l2-ctl/v4l2-ctl-common.cpp | 19 ++++++++++---------
+ 1 file changed, 10 insertions(+), 9 deletions(-)
+
+diff --git a/utils/v4l2-ctl/v4l2-ctl-common.cpp b/utils/v4l2-ctl/v4l2-ctl-common.cpp
+index 3ea6cd3..291fb3e 100644
+--- a/utils/v4l2-ctl/v4l2-ctl-common.cpp
++++ b/utils/v4l2-ctl/v4l2-ctl-common.cpp
+@@ -692,16 +692,17 @@ static bool parse_subset(char *optarg)
+ 
+ static bool parse_next_subopt(char **subs, char **value)
+ {
+-	static char *const subopts[] = {
+-	    NULL
+-	};
+-	int opt = getsubopt(subs, subopts, value);
++	char *p = *subs;
++	*value = *subs;
+ 
+-	if (opt < 0 || *value)
+-		return false;
+-	fprintf(stderr, "No value given to suboption <%s>\n",
+-			subopts[opt]);
+-	return true;
++	while (*p && *p != ',')
++		p++;
++
++	if (*p)
++		*p++ = '\0';
++
++	*subs = p;
++	return false;
+ }
+ 
+ void common_cmd(int ch, char *optarg)
+-- 
+2.13.3
+

meta-oe/recipes-multimedia/v4l2apps/v4l-utils_1.12.3.bb

@@ -18,7 +18,10 @@ SRC_URI = "http://linuxtv.org/downloads/v4l-utils/v4l-utils-${PV}.tar.bz2 \
            file://0001-buildsystem-do-not-assume-building-in-source-tree.patch \
            file://mediactl-pkgconfig.patch \
            file://export-mediactl-headers.patch \
-          "
+           file://0001-ir-ctl-Define-TEMP_FAILURE_RETRY-if-undefined.patch \
+           file://0002-contrib-test-Link-mc_nextgen_test-with-libargp-if-ne.patch \
+           file://0003-v4l2-ctl-Do-not-use-getsubopt.patch \
+           "
 SRC_URI[md5sum] = "89e1ed6c69c94e0489dc0a638c7841aa"
 SRC_URI[sha256sum] = "5a47dd6f0e7dfe902d94605c01d385a4a4e87583ff5856d6f181900ea81cf46e"