crossdev: Use libunwind and libc++ in LLVM environments

Avoid build issues on cross environments using musl and LLVM by using
libunwind and libc++ explicitly in the clang configuration. Otherwise,
clang expects GCC libunwind and libstdc++.

These flags were not set explicitly in the clang configuration, because
LLVM profiles were setting them, but that's not the case anymore[0].

[0] https://github.com/gentoo/gentoo/commit/5e5c9d5c524871f5af260557dbd2962b8eec5087

Bug: https://bugs.gentoo.org/941140
Signed-off-by: Michal Rostecki <vadorovsky@protonmail.com>
Closes: https://github.com/gentoo/crossdev/pull/23
Signed-off-by: Sam James <sam@gentoo.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/crossdev b/crossdev
index 1b53fd2..176bb71 100755
--- a/crossdev
+++ b/crossdev
@@ -1736,7 +1736,8 @@ if [[ "${LLVM}" == "yes" ]]; then
 	--rtlib=compiler-rt
 	--sysroot=/usr/${CTARGET}
 	--target=${CTARGET}
-	--unwindlib=none
+	--unwindlib=libunwind
+	--stdlib=libc++
 	-fuse-ld=lld
 	EOF
 	# Workaround until LLVM libc supports dynamic linking and SSP