gnu: mrustc: Update to 0.10.0-2.597593a.

* gnu/packages/rust.scm (mrustc): Update to 0.10.0-2.597593a.
[source]: Remove patch.
(rust-bootstrap)[arguments]: Adjust custom 'patch-makefiles phase for
changes in source.
* gnu/packages/patches/mrustc-riscv64-support.patch: Remove file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -1544,7 +1544,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/monero-use-system-miniupnpc.patch			\
   %D%/packages/patches/mosaicatcher-unbundle-htslib.patch	\
   %D%/packages/patches/mrrescue-support-love-11.patch		\
-  %D%/packages/patches/mrustc-riscv64-support.patch		\
   %D%/packages/patches/mtools-mformat-uninitialized.patch	\
   %D%/packages/patches/mupen64plus-ui-console-notice.patch	\
   %D%/packages/patches/mupen64plus-video-z64-glew-correct-path.patch    \

gnu/packages/patches/mrustc-riscv64-support.patch

@@ -1,48 +0,0 @@
-Patch sent upstream for review:
-https://github.com/thepowersgang/mrustc/pull/276
-
-diff --git a/src/trans/target.cpp b/src/trans/target.cpp
-index 420a2870..4d5eefb3 100644
---- a/src/trans/target.cpp
-+++ b/src/trans/target.cpp
-@@ -65,6 +65,13 @@ const TargetArch ARCH_POWERPC64LE = {
-     { /*atomic(u8)=*/true, true, true, true,  true },
-     TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
- };
-+// This is a guess
-+const TargetArch ARCH_RISCV64 = {
-+    "riscv64",
-+    64, false,
-+    { /*atomic(u8)=*/true, true, true, true,  true },
-+    TargetArch::Alignments(2, 4, 8, 16, 4, 8, 8)
-+};
- TargetSpec  g_target;
- 
- 
-@@ -455,6 +462,13 @@ namespace
-                 ARCH_POWERPC64LE
-                 };
-         }
-+        else if(target_name == "riscv64-unknown-linux-gnu")
-+        {
-+            return TargetSpec {
-+                "unix", "linux", "gnu", {CodegenMode::Gnu11, false, "riscv64-unknown-linux-gnu", BACKEND_C_OPTS_GNU},
-+                ARCH_RISCV64
-+                };
-+        }
-         else if(target_name == "i586-pc-windows-gnu")
-         {
-             return TargetSpec {
-diff --git a/tools/common/target_detect.h b/tools/common/target_detect.h
-index a052da6b..42fea91a 100644
---- a/tools/common/target_detect.h
-+++ b/tools/common/target_detect.h
-@@ -34,6 +34,8 @@
- #  define DEFAULT_TARGET_NAME "powerpc64-unknown-linux-gnu"
- # elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)
- #  define DEFAULT_TARGET_NAME "powerpc64le-unknown-linux-gnu"
-+# elif defined(__riscv) && __riscv_xlen == 64
-+#  define DEFAULT_TARGET_NAME "riscv64-unknown-linux-gnu"
- # else
- #  warning "Unable to detect a suitable default target (linux-gnu)"
- # endif

gnu/packages/rust.scm

@@ -124,11 +124,11 @@ (define* (rust-bootstrapped-package base-rust version checksum)
 
 ;;; Note: mrustc's only purpose is to be able to bootstap Rust; it's designed
 ;;; to be used in source form.
-(define %mrustc-commit "b364724f15fd6fce8234ad8add68107c23a22151")
+(define %mrustc-commit "597593aba86fa2edbea80c6e09f0b1b2a480722d")
 (define %mrustc-source
   (let* ((version "0.10")
          (commit %mrustc-commit)
-         (revision "1")
+         (revision "2")
          (name "mrustc"))
     (origin
       (method git-fetch)
@@ -138,8 +138,7 @@ (define %mrustc-source
       (file-name (git-file-name name (git-version version revision commit)))
       (sha256
        (base32
-        "0f7kh4n2663sn0z3xib8gzw0s97qpvwag40g2vs3bfjlrbpgi9z0"))
-      (patches (search-patches "mrustc-riscv64-support.patch")))))
+        "09rvm3zgx1d86gippl8qzh13m641ynbw9q0zsc90g0h1khd3z3b6")))))
 
 ;;; Rust 1.54 is special in that it is built with mrustc, which shortens the
 ;;; bootstrap path.
@@ -229,7 +228,7 @@ (define rust-bootstrap
                  (substitute* '("minicargo.mk"
                                 "run_rustc/Makefile")
                    ;; Use the system-provided LLVM.
-                   (("LLVM_CONFIG := .*")
+                   (("LLVM_CONFIG [:|?]= .*")
                     (string-append "LLVM_CONFIG := " llvm "/bin/llvm-config\n")))
                  (substitute* "minicargo.mk"
                    ;; Do not try to fetch sources from the Internet.