tcp-wrappers: Fix build with musl

(From OE-Core rev: 27459f5e4a9b86b0cd751f6ec3b92071e4316cc0)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/musl-decls.patch

@@ -0,0 +1,31 @@
+__BEGIN_DECLS/__END_DECLS are BSD specific and not defined in musl
+glibc and uclibc had sys/cdefs.h doing it.
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Index: tcp_wrappers_7.6/tcpd.h
+===================================================================
+--- tcp_wrappers_7.6.orig/tcpd.h
++++ tcp_wrappers_7.6/tcpd.h
+@@ -11,7 +11,9 @@
+ #include <netinet/in.h>
+ #include <stdio.h>
+ 
+-__BEGIN_DECLS
++#ifdef __cplusplus
++extern "C" {
++#endif
+ 
+ /* Structure to describe one communications endpoint. */
+ 
+@@ -252,6 +254,8 @@ extern char *fix_strtok();
+ extern char *my_strtok();
+ #endif
+ 
+-__END_DECLS
++#ifdef __cplusplus
++}
++#endif
+ 
+ #endif

meta/recipes-extended/tcp-wrappers/tcp-wrappers_7.6.bb

@@ -43,6 +43,7 @@ SRC_URI = "ftp://ftp.porcupine.org/pub/security/tcp_wrappers_${PV}.tar.gz \
            file://try-from.8 \
            file://safe_finger.8 \
            file://makefile-fix-parallel.patch \
+           file://musl-decls.patch \
            "
 
 SRC_URI[md5sum] = "e6fa25f71226d090f34de3f6b122fb5a"
@@ -73,6 +74,9 @@ EXTRA_OEMAKE = "'CC=${CC}' \
 
 EXTRA_OEMAKE_NETGROUP = "-DNETGROUP -DUSE_GETDOMAIN"
 EXTRA_OEMAKE_NETGROUP_libc-uclibc = "-DUSE_GETDOMAIN"
+EXTRA_OEMAKE_NETGROUP_libc-musl = "-DUSE_GETDOMAIN"
+
+EXTRA_OEMAKE_append_libc-musl = " 'LIBS='"
 
 do_compile () {
 	oe_runmake 'TABLES=-DHOSTS_DENY=\"${sysconfdir}/hosts.deny\" -DHOSTS_ALLOW=\"${sysconfdir}/hosts.allow\"' \