v4l-utils: Fix build with musl

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/meta-oe/recipes-multimedia/v4l2apps/v4l-utils/0003-v4l2-ctl-Do-not-use-getsubopt.patch b/meta-oe/recipes-multimedia/v4l2apps/v4l-utils/0003-v4l2-ctl-Do-not-use-getsubopt.patch
new file mode 100644
index 000000000..0a986ae5d
--- /dev/null
+++ b/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
+