slackware-current/source/d/rust/link_libffi.diff

--- ./compiler/rustc_llvm/build.rs.orig	2020-11-16 08:01:53.000000000 -0600
+++ ./compiler/rustc_llvm/build.rs	2020-11-19 13:46:21.222785372 -0600
@@ -234,6 +234,8 @@
         println!("cargo:rustc-link-lib={}={}", kind, name);
     }
 
+    println!("cargo:rustc-link-lib=dylib=ffi");
+
     // LLVM ldflags
     //
     // If we're a cross-compile of LLVM then unfortunately we can't trust these
Fri Nov 20 02:37:23 UTC 2020 a/kernel-firmware-20201119_54c797a-noarch-1.txz: Upgraded. a/tcsh-6.22.03-x86_64-1.txz: Upgraded. d/automake-1.16.3-noarch-1.txz: Upgraded. d/rust-1.48.0-x86_64-1.txz: Upgraded. l/libcap-ng-0.8.1-x86_64-1.txz: Upgraded. n/libksba-1.5.0-x86_64-1.txz: Upgraded. 2020-11-20 02:37:23 +00:00			`--- ./compiler/rustc_llvm/build.rs.orig 2020-11-16 08:01:53.000000000 -0600`
			`+++ ./compiler/rustc_llvm/build.rs 2020-11-19 13:46:21.222785372 -0600`
			`@@ -234,6 +234,8 @@`
Mon May 28 19:12:29 UTC 2018 a/pkgtools-15.0-noarch-13.txz: Rebuilt. installpkg: default line length for --terselength is the number of columns. removepkg: added --terse mode. upgradepkg: default line length for --terselength is the number of columns. upgradepkg: accept -option in addition to --option. ap/vim-8.1.0026-x86_64-1.txz: Upgraded. d/bison-3.0.5-x86_64-1.txz: Upgraded. e/emacs-26.1-x86_64-1.txz: Upgraded. kde/kopete-4.14.3-x86_64-8.txz: Rebuilt. Recompiled against libidn-1.35. n/conntrack-tools-1.4.5-x86_64-1.txz: Upgraded. n/libnetfilter_conntrack-1.0.7-x86_64-1.txz: Upgraded. n/libnftnl-1.1.0-x86_64-1.txz: Upgraded. n/links-2.16-x86_64-2.txz: Rebuilt. Rebuilt to enable X driver for -g mode. n/lynx-2.8.9dev.19-x86_64-1.txz: Upgraded. n/nftables-0.8.5-x86_64-1.txz: Upgraded. n/p11-kit-0.23.11-x86_64-1.txz: Upgraded. n/ulogd-2.0.7-x86_64-1.txz: Upgraded. n/whois-5.3.1-x86_64-1.txz: Upgraded. xap/network-manager-applet-1.8.12-x86_64-1.txz: Upgraded. xap/vim-gvim-8.1.0026-x86_64-1.txz: Upgraded. 2018-05-28 19:12:29 +00:00			`println!("cargo:rustc-link-lib={}={}", kind, name);`
			`}`

			`+ println!("cargo:rustc-link-lib=dylib=ffi");`
			`+`
			`// LLVM ldflags`
			`//`
			`// If we're a cross-compile of LLVM then unfortunately we can't trust these`