Add support for riscv64

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

0001-Bring-back-riscv64-redhat-linux-triplet.patch

@@ -0,0 +1,27 @@
+From 2dcf8703706e0a5b7b45991e5cd10dd38f1d8c4b Mon Sep 17 00:00:00 2001
+From: David Abdurachmanov <davidlt@rivosinc.com>
+Date: Thu, 24 Nov 2022 06:26:46 +0200
+Subject: [PATCH] Bring back riscv64-redhat-linux triplet
+
+Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>
+---
+ clang/lib/Driver/ToolChains/Gnu.cpp | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
+index e955835b..e5c17544 100644
+--- a/clang/lib/Driver/ToolChains/Gnu.cpp
++++ b/clang/lib/Driver/ToolChains/Gnu.cpp
+@@ -2302,7 +2302,8 @@ void Generic_GCC::GCCInstallationDetector::AddDefaultGCCPrefixes(
+   static const char *const RISCV64LibDirs[] = {"/lib64", "/lib"};
+   static const char *const RISCV64Triples[] = {"riscv64-unknown-linux-gnu",
+                                                "riscv64-linux-gnu",
+-                                               "riscv64-unknown-elf"};
++                                               "riscv64-unknown-elf",
++                                               "riscv64-redhat-linux"};
+ 
+   static const char *const SPARCv8LibDirs[] = {"/lib32", "/lib"};
+   static const char *const SPARCv8Triples[] = {"sparc-linux-gnu",
+-- 
+2.37.1
+

clang15.spec

@@ -41,7 +41,7 @@
 
 Name:		%pkg_name
 Version:	%{clang_version}%{?rc_ver:~rc%{rc_ver}}
-Release:	3%{?dist}
+Release:	4.0.riscv64%{?dist}
 Summary:	A C language family front-end for LLVM
 
 License:	Apache-2.0 WITH LLVM-exception OR NCSA
@@ -75,6 +75,8 @@ Patch8:     0001-clang-Fix-interaction-between-asm-labels-and-inline-.patch
 Patch9:     0001-clang-MinGW-Improve-extend-the-gcc-sysroot-detection.patch
 Patch10:    0002-clang-MinGW-Improve-detection-of-libstdc-headers-on-.patch
 
+Patch20:    0001-Bring-back-riscv64-redhat-linux-triplet.patch
+
 %if %{with compat_build}
 # Ensure that clang looks for LLVMgold.so in the directory the compat build
 # uses.
@@ -303,7 +305,7 @@ rm test/CodeGen/profile-filter.c
 # Use ThinLTO to limit build time.
 %define _lto_cflags -flto=thin
 # And disable LTO on AArch64 entirely.
-%ifarch aarch64
+%ifarch aarch64 riscv64
 %define _lto_cflags %{nil}
 %endif
 
@@ -313,7 +315,7 @@ sed -i 's/\@FEDORA_LLVM_LIB_SUFFIX\@/64/g' test/lit.cfg.py
 sed -i 's/\@FEDORA_LLVM_LIB_SUFFIX\@//g' test/lit.cfg.py
 %endif
 
-%ifarch s390 s390x %{arm} aarch64 %ix86 ppc64le
+%ifarch s390 s390x %{arm} aarch64 %ix86 ppc64le riscv64
 # Decrease debuginfo verbosity to reduce memory consumption during final library linking
 %global optflags %(echo %{optflags} | sed 's/-g /-g1 /')
 %endif
@@ -335,7 +337,7 @@ sed -i 's/\@FEDORA_LLVM_LIB_SUFFIX\@//g' test/lit.cfg.py
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 	-DPYTHON_EXECUTABLE=%{__python3} \
 	-DCMAKE_SKIP_RPATH:BOOL=ON \
-%ifarch s390 s390x %{arm} %ix86 ppc64le
+%ifarch s390 s390x %{arm} %ix86 ppc64le riscv64
 	-DCMAKE_C_FLAGS_RELWITHDEBINFO="%{optflags} -DNDEBUG" \
 	-DCMAKE_CXX_FLAGS_RELWITHDEBINFO="%{optflags} -DNDEBUG" \
 %endif
@@ -483,9 +485,9 @@ ln -s %{_datadir}/clang/clang-format-diff.py %{buildroot}%{_bindir}/clang-format
 %cmake_build --target clang-test-depends \
     ExtraToolsUnitTests ClangdUnitTests ClangIncludeCleanerUnitTests ClangPseudoUnitTests
 # requires lit.py from LLVM utilities
-# FIXME: Fix failing ARM tests
+# FIXME: Fix failing ARM & RISCV tests
 LD_LIBRARY_PATH=%{buildroot}/%{_libdir} %{__ninja} check-all -C %{__cmake_builddir} || \
-%ifarch %{arm}
+%ifarch %{arm} riscv64
 :
 %else
 false
@@ -618,6 +620,14 @@ false
 
 %endif
 %changelog
+* Sat Apr 23 2023 David Abdurachmanov <davidlt@rivosinc.com> - 15.0.7-4.0.riscv64
+- Ignore test suite failures on riscv64 for now
+- Prepare for riscv64
+- Add riscv64-redhat-linux triplet
+
+* Mon Mar 27 2023 Tulio Magno Quites Machado Filho <tuliom@redhat.com> - 15.0.7-4
+- Rebuild for LLVM 16.0.0 update
+
 * Thu Jan 19 2023 Tulio Magno Quites Machado Filho <tuliom@redhat.com> - 15.0.7-3
 - Update license to SPDX identifiers.
 - Include the Apache license adopted in 2019.