devel/libqsbr: fix build on 32 bit platforms

The fix is to make qsbr_epoch_t a 64 bit integer in any case.  The fix
is carefully designed not to change the API on platforms where it is so
already.  Unfortunately this fix requires FreeBSD 13 or newer due to the
old LLVM version included in FreeBSD 12.

While we are at it, hook up test target.

See also:	rmind/libqsbr#12
Approved by:	portmgr (build fix blanket)
MFH:		2023Q4

devel/libqsbr/Makefile

@@ -9,8 +9,12 @@ WWW=		https://github.com/rmind/libqsbr
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/../LICENSE
 
-BROKEN_i386=	static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
-BROKEN_powerpc=	static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
+# the fix uses __LONG_WIDTH__ which is only available from FreeBSD 13
+BROKEN_FreeBSD_12_i386=		static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
+BROKEN_FreeBSD_12_armv6=	static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
+BROKEN_FreeBSD_12_armv7=	static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
+BROKEN_FreeBSD_12_powerpc=	static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
+BROKEN_FreeBSD_12_mips=		static_assert(sizeof(qsbr_epoch_t) == 8, "expected 64-bit counter")
 
 USES=		compiler:c11 gmake libtool:build
 USE_GITHUB=	yes
@@ -22,5 +26,6 @@ MAKE_ENV=	DESTDIR=${STAGEDIR}${PREFIX} \
 		INCDIR=${LOCALBASE}/include \
 		LIBDIR=${LOCALBASE}/lib \
 		MANDIR=${LOCALBASE}/man
+TEST_TARGET=	tests
 
 .include <bsd.port.mk>

devel/libqsbr/files/patch-qsbr.h

@@ -0,0 +1,14 @@
+--- qsbr.h.orig	2023-10-25 22:40:12 UTC
++++ qsbr.h
+@@ -13,7 +13,11 @@
+
+ struct qsbr;
+ typedef struct qsbr qsbr_t;
++#if defined(__LONG_WIDTH__) && __LONG_WIDTH < 64
++typedef unsigned long long qsbr_epoch_t;
++#else
+ typedef unsigned long qsbr_epoch_t;
++#endif
+
+ __BEGIN_DECLS
+