rust/options.mk: use internal LLVM on NetBSD < 9.

[Havard Eidnes <he%uninett.no@localhost>]

Module Name:	pkgsrc-wip
Committed By:	Havard Eidnes <he%uninett.no@localhost>
Pushed By:	he
Date:		Sat Aug 27 12:03:33 2022 +0200
Changeset:	7b7c97103c4df949ffa61852a0e8a3adf92a0d20

Modified Files:
	rust/options.mk

Log Message:
rust/options.mk: use internal LLVM on NetBSD < 9.

Issues have been observed on i386 and powerpc.

This problem is caused by the shenanigans files/gcc-wrap is up to,
bypassing the gcc wrappers.  On NetBSD < 9, this causes a mis-match
between ABI marking between pkgsrc LLVM and what rust expects; several
functions in LLVM will be marked abi:cxx11, causing a mismatch.

To see a diff of this commit:
https://wip.pkgsrc.org/cgi-bin/gitweb.cgi?p=pkgsrc-wip.git;a=commitdiff;h=7b7c97103c4df949ffa61852a0e8a3adf92a0d20

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

diffstat:
 rust/options.mk | 4 ++++
 1 file changed, 4 insertions(+)

diffs:
diff --git a/rust/options.mk b/rust/options.mk
index 1fd629a171..2fca6d9ab7 100644
--- a/rust/options.mk
+++ b/rust/options.mk
@@ -15,7 +15,11 @@ PKG_SUGGESTED_OPTIONS+=		rust-internal-llvm
 # As of 1.61, the pkgsrc LLVM causes build failure on i386 and powerpc
 .  if ${OPSYS} == "NetBSD"
 .    if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "powerpc"
+# In-tree g++ is too old on NetBSD 8.x and due to the shenanigans
+# files/gcc-wrap does, we need the internal LLVM
+.      if !empty(OS_VERSION:M8.*)
 PKG_SUGGESTED_OPTIONS+=		rust-internal-llvm
+.      endif
 .    endif
 .  endif
 .endif