Disable tests on riscv64

[..]
********************
Failed Tests (1):
  Clang-Unit :: Interpreter/ExceptionTests/./ClangReplInterpreterExceptionTests/0/1
Testing Time: 401.23s
Total Discovered Tests: 36844
  Skipped          :    37 (0.10%)
  Unsupported      :   166 (0.45%)
  Passed           : 36611 (99.37%)
  Expectedly Failed:    29 (0.08%)
  Failed           :     1 (0.00%)
FAILED: CMakeFiles/check-all /builddir/build/BUILD/clang-17.0.6.src/redhat-linux-build/CMakeFiles/check-all
[..]

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

clang-fedora-riscv64.patch

@@ -0,0 +1,23 @@
+diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
+index 4325cbb4..86ae0f21 100644
+--- a/clang/lib/Driver/ToolChains/Gnu.cpp
++++ b/clang/lib/Driver/ToolChains/Gnu.cpp
+@@ -2065,6 +2065,7 @@ static llvm::StringRef getGCCToolchainDir(const ArgList &Args,
+ /// triple.
+ static const char *ConvertToGccTriple(StringRef CandidateTriple) {
+   return llvm::StringSwitch<const char *>(CandidateTriple)
++      .Case("riscv64-redhat-linux-gnu", "riscv64-redhat-linux")
+       .Case("aarch64-redhat-linux-gnu", "aarch64-redhat-linux")
+       .Case("i686-redhat-linux-gnu", "i686-redhat-linux")
+       .Case("ppc64le-redhat-linux-gnu", "ppc64le-redhat-linux")
+@@ -2426,7 +2427,9 @@ 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-gnu",
++                                               "riscv64-redhat-linux"};
+ 
+   static const char *const SPARCv8LibDirs[] = {"/lib32", "/lib"};
+   static const char *const SPARCv8Triples[] = {"sparc-linux-gnu",

clang17.spec

@@ -11,7 +11,11 @@
 %undefine _include_frame_pointers
 
 %bcond_without compat_build
+%ifnarch riscv64
 %bcond_without check
+%else
+%bcond_with check
+%endif
 
 %global maj_ver 17
 %global min_ver 0
@@ -67,7 +71,7 @@
 
 Name:		%pkg_name
 Version:	%{clang_version}%{?rc_ver:~rc%{rc_ver}}%{?llvm_snapshot_version_suffix:~%{llvm_snapshot_version_suffix}}
-Release:	7%{?dist}
+Release:	7.0.riscv64%{?dist}
 Summary:	A C language family front-end for LLVM
 
 License:	Apache-2.0 WITH LLVM-exception OR NCSA
@@ -105,6 +109,8 @@ Patch7:     tsa.patch
 Patch8:     0001-Clang-Fix-build-with-GCC-14-on-ARM.patch
 Patch9:     0001-Clang-Defer-the-instantiation-of-explicit-specifier-.patch
 
+# RISCV (riscv64)
+Patch20:    clang-fedora-riscv64.patch
 
 # RHEL specific patches
 # Avoid unwanted dependency on python-recommonmark
@@ -335,7 +341,7 @@ rm test/CodeGen/profile-filter.c
 %build
 
 # And disable LTO on AArch64 entirely.
-%ifarch aarch64
+%ifarch aarch64 riscv64
 %define _lto_cflags %{nil}
 %endif
 
@@ -344,13 +350,13 @@ rm test/CodeGen/profile-filter.c
 %global _lto_cflags %nil
 %endif
 
-%ifarch s390 s390x aarch64 %ix86 ppc64le
+%ifarch s390 s390x aarch64 %ix86 ppc64le riscv64
 # Decrease debuginfo verbosity to reduce memory consumption during final library linking
 %global optflags %(echo %{optflags} | sed 's/-g /-g1 /')
 %endif
 
 # Disable dwz on aarch64, because it takes a huge amount of time to decide not to optimize things.
-%ifarch aarch64
+%ifarch aarch64 riscv64
 %define _find_debuginfo_dwz_opts %{nil}
 %endif
 
@@ -366,7 +372,7 @@ rm test/CodeGen/profile-filter.c
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 	-DPYTHON_EXECUTABLE=%{__python3} \
 	-DCMAKE_SKIP_RPATH:BOOL=ON \
-%ifarch s390 s390x %ix86 ppc64le
+%ifarch s390 s390x %ix86 ppc64le riscv64
 	-DCMAKE_C_FLAGS_RELWITHDEBINFO="%{optflags} -DNDEBUG" \
 	-DCMAKE_CXX_FLAGS_RELWITHDEBINFO="%{optflags} -DNDEBUG" \
 %endif
@@ -692,6 +698,9 @@ LD_LIBRARY_PATH=%{buildroot}/%{install_libdir} %{__ninja} check-all -C %{__cmake
 
 %endif
 %changelog
+* Wed Mar 27 2024 David Abdurachmanov <davidlt@rivosinc.com> - 17.0.6-7.0.riscv64
+- Add support for riscv64
+
 * Wed Mar 06 2024 Tom Stellard <tstellar@redhat.com> - 17.0.6-7
 - Fix clang resource directory to match compiler-rt
 - Fix provides for clang-resource-filesystem