lang/rust: Update to 1.39.0

- Force rebuild all consumers to catch regressions early
- Partially apply D20792 in preparation for PPC_ABI support
- Add LibreSSL 3.0.x support [1]

Thanks to Mikaël Urankar for providing updated bootstraps for
aarch64, armv6, armv7, powerpc64.

Changes:	https://blog.rust-lang.org/2019/11/07/Rust-1.39.0.html
PR:		241411 [1]
Tested by:	mikael.urankar@gmail.com, tobik
With hat:	rust
Differential Revision:	https://reviews.freebsd.org/D22240

1 files changed, 14 insertions, 0 deletions

diff --git a/lang/rust/files/powerpc64-elfv1/patch-src_librustc__llvm_build.rs b/lang/rust/files/powerpc64-elfv1/patch-src_librustc__llvm_build.rs
new file mode 100644
index 000000000000..db32de43d8c5
--- /dev/null
+++ b/lang/rust/files/powerpc64-elfv1/patch-src_librustc__llvm_build.rs
@@ -0,0 +1,14 @@
+--- src/librustc_llvm/build.rs.orig	2019-11-04 15:45:21 UTC
++++ src/librustc_llvm/build.rs
+@@ -273,7 +273,10 @@ fn main() {
+     };
+ 
+     // C++ runtime library
+-    if !target.contains("msvc") {
++    if target == "powerpc64-unknown-freebsd" {
++        println!("cargo:rustc-link-search=native=/usr/local/lib/%CC%");
++        println!("cargo:rustc-link-lib=static=stdc++");
++    } else if !target.contains("msvc") {
+         if let Some(s) = llvm_static_stdcpp {
+             assert!(!cxxflags.contains("stdlib=libc++"));
+             let path = PathBuf::from(s);