emulators/virtualbox-ose-legacy: build fails on FreeBSD 12.4, 13.1 an…

…d 13.2 (all supported releases)

llvm 13 and 14 included in FreeBSD fails to compile, force llvm 15 on
all versions of the FreeBSD except lastest 13 and 14 where the llvm 15
is included.
Keep possibility to define different llvm via VBOX_LLVM_VER in make.conf.

PR:			265539
Reported by:		freebsd@charles.lecklider.org
Tested by:		grahamperrin
Approved by:		tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D40408

emulators/virtualbox-ose-legacy/Makefile

@@ -206,22 +206,16 @@ KMK_FLAGS+=	-j${MAKE_JOBS_NUMBER}
 
 .include <bsd.port.pre.mk>
 
-.if ${OPSYS} == FreeBSD
-.if ${OSVERSION} >= 1400059
-BROKEN=		Fails to compile with libc++ 14.0.3
-.elif ${OSVERSION} >= 1301000 && ${OSVERSION} < 1400000
-BROKEN=		Fails to compile: error: ran out of registers during register allocation
-.endif
-.endif
-
-.if ${CHOSEN_COMPILER_TYPE} == clang && ${OPSYS} == FreeBSD && ${OSVERSION} > 1400022
-# clang > 11 included in FreeBSD 14 fails to compile this legacy version
-# of virtualbox-ose, force clang 11 on FreeBSD 14 where a newer clang is
-# included.
+.if ${CHOSEN_COMPILER_TYPE} == clang && ${OPSYS} == FreeBSD && \
+    (${OSVERSION} < 1302505 || (${OSVERSION} >= 1400000 && ${OSVERSION} < 1400079))
+# llvm 13 and 14 included in FreeBSD fails to compile this legacy version of
+# virtualbox-ose, force llvm 15 on all versions of the FreeBSD except lastest 13
+# and 14 where the llvm 15 is included: PR#265539.
+# Keep possibility to define different llvm via VBOX_LLVM_VER in make.conf.
 BUILD_DEPENDS+=	clang${VBOX_LLVM_VER}:devel/llvm${VBOX_LLVM_VER}
 CC=		clang${VBOX_LLVM_VER}
 CXX=		clang++${VBOX_LLVM_VER}
-VBOX_LLVM_VER?=	11
+VBOX_LLVM_VER?=	15
 .endif
 
 .if ${PYTHON_MAJOR_VER} >= 3