libexecinfo: Integrate NetBSD test into FreeBSD

etc/mtree/BSD.tests.dist

@@ -384,6 +384,8 @@
         ..
         libdevdctl
         ..
+        libexecinfo
+        ..
         libkvm
         ..
         libmp

lib/libexecinfo/Makefile

@@ -1,12 +1,13 @@
 # $FreeBSD$
 
 PACKAGE=lib${LIB}
-LIBEXECINFO=	${SRCTOP}/contrib/libexecinfo
+
+.include <src.opts.mk>
 
 LIB=		execinfo
 SHLIB_MAJOR=	1
 
-.PATH:		${LIBEXECINFO}
+.PATH:		${SRCTOP}/contrib/libexecinfo
 
 INCS=		execinfo.h
 SRCS=		backtrace.c symtab.c unwind.c
@@ -21,4 +22,7 @@ MLINKS+=	backtrace.3 backtrace_symbols_fmt.3
 MLINKS+=	backtrace.3 backtrace_symbols_fd.3
 MLINKS+=	backtrace.3 backtrace_symbols_fd_fmt.3
 
+HAS_TESTS=
+SUBDIR.${MK_TESTS}+= tests
+
 .include <bsd.lib.mk>

lib/libexecinfo/tests/Makefile

@@ -0,0 +1,15 @@
+# $FreeBSD$
+
+PACKAGE=	tests
+
+TESTSRC=	${SRCTOP}/contrib/netbsd-tests/lib/libexecinfo
+
+.include <bsd.own.mk>
+
+NETBSD_ATF_TESTS_C+=	backtrace_test
+
+LIBADD.backtrace_test+=	execinfo
+
+.include <netbsd-tests.test.mk>
+
+.include <bsd.test.mk>