Add support for RISC-V (riscv64)

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>

ghc-8.2.20-riscv.patch

@@ -0,0 +1,26 @@
+diff --git a/aclocal.m4 b/aclocal.m4
+index d5078de..cf0a0fe 100644
+--- a/aclocal.m4
++++ b/aclocal.m4
+@@ -216,7 +216,7 @@ AC_DEFUN([FPTOOLS_SET_HASKELL_PLATFORM_VARS],
+         mipsel)
+             test -z "[$]2" || eval "[$]2=ArchMipsel"
+             ;;
+-        hppa|hppa1_1|ia64|m68k|rs6000|s390|s390x|sh4|vax)
++        hppa|hppa1_1|ia64|m68k|riscv32|riscv64|rs6000|s390|s390x|sh4|vax)
+             test -z "[$]2" || eval "[$]2=ArchUnknown"
+             ;;
+         *)
+@@ -1895,6 +1895,12 @@ case "$1" in
+   powerpc*)
+     $2="powerpc"
+     ;;
++  riscv64*)
++    $2="riscv64"
++    ;;
++  riscv|riscv32*)
++    $2="riscv32"
++    ;;
+   rs6000)
+     $2="rs6000"
+     ;;

ghc.spec

@@ -30,7 +30,7 @@
 %global llvm_major 5.0
 %global ghc_llvm_archs armv7hl aarch64
 
-%global ghc_unregisterized_arches s390 s390x %{mips}
+%global ghc_unregisterized_arches s390 s390x %{mips} riscv64
 
 Name: ghc
 # ghc must be rebuilt after a version bump to avoid ABI change problems
@@ -39,7 +39,7 @@ Version: 8.4.4
 # - release can only be reset if *all* library versions get bumped simultaneously
 #   (sometimes after a major release)
 # - minor release numbers for a branch should be incremented monotonically
-Release: 73%{?dist}
+Release: 73.0.riscv64%{?dist}
 Summary: Glasgow Haskell Compiler
 
 License: BSD and HaskellReport
@@ -78,6 +78,9 @@ Patch26: no-missing-haddock-file-warning.patch
 Patch28: x32-use-native-x86_64-insn.patch
 Patch30: fix-build-using-unregisterized-v8.2.patch
 
+# RISC-V
+Patch40: ghc-8.2.20-riscv.patch
+
 # fedora ghc has been bootstrapped on
 # %%{ix86} x86_64 ppc ppc64 armv7hl s390 s390x ppc64le aarch64
 # and retired arches: alpha sparcv9 armv5tel
@@ -304,6 +307,10 @@ rm -r libffi-tarballs
 %patch30 -p1 -b .orig
 %endif
 
+%ifarch riscv64
+%patch40 -p1 -b .orig
+%endif
+
 %global gen_contents_index gen_contents_index.orig
 %if %{with docs}
 if [ ! -f "libraries/%{gen_contents_index}" ]; then
@@ -346,7 +353,7 @@ EOF
 
 %build
 # for patch12
-%ifarch armv7hl
+%ifarch armv7hl riscv64
 autoreconf
 %else
 # for patch5
@@ -655,6 +662,9 @@ fi
 
 
 %changelog
+* Tue Feb 19 2019 David Abdurachmanov <david.abdurachmanov@gmail.com> - 8.4.4-73.0.riscv64
+- Enable RISC-V (riscv64)
+
 * Sat Feb 16 2019 Jens Petersen <petersen@redhat.com> - 8.4.4-73
 - update to GHC 8.4
 - https://ghc.haskell.org/trac/ghc/blog/ghc-8.4.1-released