The libnl+musl combination has two issues at the moment:
a) a public header file #include's an incorrect file
(sys/poll.h instead of poll.h), which causes warnings and
potentially errors (-Werror) in a musl based system
b) musl only ever provides the XSI version of strerror_r()
a) can be fixed using a generic patch
b) has to be applied on demand for musl-based systems, only
Signed-off-by: André Draszik <g...@andred.net>
---
...nclude-standard-poll.h-instead-of-sys-pol.patch | 40 +++++++
.../libnl/0002-musl-fix-strerror_r-usage.patch | 124 +++++++++++++++++++++
meta/recipes-support/libnl/libnl_3.2.25.bb | 2 +
3 files changed, 166 insertions(+)
create mode 100644
meta/recipes-support/libnl/libnl/0001-netlink.h-include-standard-poll.h-instead-of-sys-pol.patch
create mode 100644
meta/recipes-support/libnl/libnl/0002-musl-fix-strerror_r-usage.patch
diff --git
a/meta/recipes-support/libnl/libnl/0001-netlink.h-include-standard-poll.h-instead-of-sys-pol.patch
b/meta/recipes-support/libnl/libnl/0001-netlink.h-include-standard-poll.h-instead-of-sys-pol.patch
new file mode 100644
index 0000000..c9096ce
--- /dev/null
+++
b/meta/recipes-support/libnl/libnl/0001-netlink.h-include-standard-poll.h-instead-of-sys-pol.patch
@@ -0,0 +1,40 @@
+From 7f73d736db539eb4c6e7d59ed9332615d10ea785 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <g...@andred.net>
+Date: Thu, 11 Aug 2016 11:53:44 +0100
+Subject: [PATCH 1/2] netlink.h: #include standard poll.h instead of sys/poll.h
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+musl issues a #warning if a non-standard file like is included
+instead of the posix version (sys/poll.h vs poll.h in this
+case).
+Given netlink.h is installed and intended to be used by other
+projects, those other projects fail to compile if they enable
+-Werror (e.g. crda).
+
+Just do the correct thing and #include <poll.h> (the file
+specified by posix).
+
+Signed-off-by: André Draszik <g...@andred.net>
+---
+Upstream-Status: Pending
+ include/netlink/netlink.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/netlink/netlink.h b/include/netlink/netlink.h
+index 28dba06..61656b3 100644
+--- a/include/netlink/netlink.h
++++ b/include/netlink/netlink.h
+@@ -16,7 +16,7 @@
+ #include <stdint.h>
+ #include <string.h>
+ #include <stdlib.h>
+-#include <sys/poll.h>
++#include <poll.h>
+ #include <sys/socket.h>
+ #include <sys/types.h>
+ #include <sys/time.h>
+--
+2.8.1
+
diff --git
a/meta/recipes-support/libnl/libnl/0002-musl-fix-strerror_r-usage.patch
b/meta/recipes-support/libnl/libnl/0002-musl-fix-strerror_r-usage.patch
new file mode 100644
index 0000000..3ded5b1
--- /dev/null
+++ b/meta/recipes-support/libnl/libnl/0002-musl-fix-strerror_r-usage.patch
@@ -0,0 +1,124 @@
+From 4a88a12742ffc0a3ba3b4d4bd1398fa278ab1738 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andr=C3=A9=20Draszik?= <g...@andred.net>
+Date: Thu, 11 Aug 2016 13:15:23 +0100
+Subject: [PATCH 2/2] musl: fix strerror_r() usage
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+glibc provides two versions of strerror_r(), which
+can be chosen between using feature test macros
+_GNU_SOURCE and _POSIX_C_SOURCE.
+musl on the other hand only ever provides the posix
+version of strerror_r().
+
+While this patch is not switching to the XSI version
+of strerror_r() in general, all implementations of
+the XSI version I have checked (bionic, uclibc,
+musl, glibc), fill buf with as many bytes as possible
+and NUL-terminate buf correctly.
+
+Switch to using XSI semantics. (This patch is only
+intended to be applied when compiling against
+musl - unfortunately musl doesn't provide any
+preprocessor directives to detect use of musl.)
+
+Signed-off-by: André Draszik <g...@andred.net>
+---
+Upstream-Status: Inappropriate [musl specific]
+ lib/fib_lookup/lookup.c | 5 ++++-
+ lib/handlers.c | 3 ++-
+ lib/msg.c | 3 ++-
+ lib/route/route_obj.c | 3 ++-
+ src/lib/utils.c | 6 ++++--
+ 5 files changed, 14 insertions(+), 6 deletions(-)
+
+diff --git a/lib/fib_lookup/lookup.c b/lib/fib_lookup/lookup.c
+index 3d07317..490f04e 100644
+--- a/lib/fib_lookup/lookup.c
++++ b/lib/fib_lookup/lookup.c
+@@ -125,6 +125,9 @@ static void result_dump_line(struct nl_object *obj, struct
nl_dump_params *p)
+ {
+ struct flnl_result *res = (struct flnl_result *) obj;
+ char buf[256];
++ char buf2[256];
++
++ strerror_r(-res->fr_error, buf2, sizeof(buf2));
+
+ nl_dump_line(p, "table %s prefixlen %u next-hop-selector %u\n",
+ rtnl_route_table2str(res->fr_table_id, buf, sizeof(buf)),
+@@ -133,7 +136,7 @@ static void result_dump_line(struct nl_object *obj, struct
nl_dump_params *p)
+ nl_rtntype2str(res->fr_type, buf, sizeof(buf)));
+ nl_dump(p, "scope %s error %s (%d)\n",
+ rtnl_scope2str(res->fr_scope, buf, sizeof(buf)),
+- strerror_r(-res->fr_error, buf, sizeof(buf)), res->fr_error);
++ buf2, res->fr_error);
+ }
+
+ static void result_dump_details(struct nl_object *obj, struct nl_dump_params
*p)
+diff --git a/lib/handlers.c b/lib/handlers.c
+index a6a97bb..1b9bb4f 100644
+--- a/lib/handlers.c
++++ b/lib/handlers.c
+@@ -81,8 +81,9 @@ static int nl_error_handler_verbose(struct sockaddr_nl *who,
+ FILE *ofd = arg ? arg : stderr;
+ char buf[256];
+
++ strerror_r(-e->error, buf, sizeof(buf));
+ fprintf(ofd, "-- Error received: %s\n-- Original message: ",
+- strerror_r(-e->error, buf, sizeof(buf)));
++ buf);
+ print_header_content(ofd, &e->msg);
+ fprintf(ofd, "\n");
+
+diff --git a/lib/msg.c b/lib/msg.c
+index bcf1aa8..eec2833 100644
+--- a/lib/msg.c
++++ b/lib/msg.c
+@@ -916,8 +916,9 @@ static void dump_error_msg(struct nl_msg *msg, FILE *ofd)
+ char buf[256];
+ struct nl_msg *errmsg;
+
++ strerror_r(-err->error, buf, sizeof(buf));
+ fprintf(ofd, " .error = %d \"%s\"\n", err->error,
+- strerror_r(-err->error, buf, sizeof(buf)));
++ buf);
+ fprintf(ofd, " [ORIGINAL MESSAGE] %zu octets\n", sizeof(*hdr));
+
+ errmsg = nlmsg_inherit(&err->msg);
+diff --git a/lib/route/route_obj.c b/lib/route/route_obj.c
+index dd4bf49..6fc4321 100644
+--- a/lib/route/route_obj.c
++++ b/lib/route/route_obj.c
+@@ -257,9 +257,10 @@ static void route_dump_details(struct nl_object *a,
struct nl_dump_params *p)
+ }
+
+ if ((r->ce_mask & ROUTE_ATTR_CACHEINFO) && r->rt_cacheinfo.rtci_error) {
++ strerror_r(-r->rt_cacheinfo.rtci_error, buf, sizeof(buf));
+ nl_dump_line(p, " cacheinfo error %d (%s)\n",
+ r->rt_cacheinfo.rtci_error,
+- strerror_r(-r->rt_cacheinfo.rtci_error, buf,
sizeof(buf)));
++ buf);
+ }
+
+ if (r->ce_mask & ROUTE_ATTR_METRICS) {
+diff --git a/src/lib/utils.c b/src/lib/utils.c
+index e5eacde..d9cc7a8 100644
+--- a/src/lib/utils.c
++++ b/src/lib/utils.c
+@@ -79,8 +79,10 @@ void nl_cli_fatal(int err, const char *fmt, ...)
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+- } else
+- fprintf(stderr, "%s\n", strerror_r(err, buf, sizeof(buf)));
++ } else {
++ strerror_r(err, buf, sizeof(buf));
++ fprintf(stderr, "%s\n", buf);
++ }
+
+ exit(abs(err));
+ }
+--
+2.8.1
+
diff --git a/meta/recipes-support/libnl/libnl_3.2.25.bb
b/meta/recipes-support/libnl/libnl_3.2.25.bb
index cabe841..540b019 100644
--- a/meta/recipes-support/libnl/libnl_3.2.25.bb
+++ b/meta/recipes-support/libnl/libnl_3.2.25.bb
@@ -13,7 +13,9 @@ DEPENDS = "flex-native bison-native"
SRC_URI = "http://www.infradead.org/~tgr/${BPN}/files/${BP}.tar.gz \
file://fix-pktloc_syntax_h-race.patch \
file://fix-pc-file.patch \
+
file://0001-netlink.h-include-standard-poll.h-instead-of-sys-pol.patch \
"
+SRC_URI_append_libc-musl = " file://0002-musl-fix-strerror_r-usage.patch"
SRC_URI[md5sum] = "03f74d0cd5037cadc8cdfa313bbd195c"
SRC_URI[sha256sum] =
"8beb7590674957b931de6b7f81c530b85dc7c1ad8fbda015398bc1e8d1ce8ec5"
--
2.8.1
--
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