ispc: on ARM, build with ARM targets enabled, and updates (#38080)

* llvm: fix build with libcxx=none

* ispc: checksum 1.20.0

* ispc: ensure that it does not crash immediately

this would happen if linked to the wrong libc++

* ispc: fix build on macos

find ncurses instead of curses and link against tinfo in order to avoid
unresolved references to _del_curterm, _set_curterm, _setupterm, and
_tigetnum

* ispc: enable arm targets, if building on arm

* ispc: remove double cmake argument

I forgot to remove the constant -DARM_ENABLED=FALSE when adding
-DARM_ENABLED with a value depending on target architecture

* ispc: fix linux build

since 1.20, linux build uses TBB as default tasking system and thus
needs to depend on it

* ispc: try to fix link error on linux

link against both curses (as before) and tinfo (added because of macos)

* ispc: update for recent llvm changes

libcxx=none instead of ~libcxx

1 files changed, 4 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/llvm/package.py b/var/spack/repos/builtin/packages/llvm/package.py
index 9b537df57a..120ce06808 100644
--- a/var/spack/repos/builtin/packages/llvm/package.py
+++ b/var/spack/repos/builtin/packages/llvm/package.py
@@ -885,6 +885,10 @@ class Llvm(CMakePackage, CudaPackage):
         if self.spec.satisfies("~code_signing platform=darwin"):
             cmake_args.append(define("LLDB_USE_SYSTEM_DEBUGSERVER", True))
 
+        # LLDB test suite requires libc++
+        if "libcxx=none" in spec:
+            cmake_args.append(define("LLDB_INCLUDE_TESTS", False))
+
         # Enable building with CLT [and not require full Xcode]
         # https://github.com/llvm/llvm-project/issues/57037
         if self.spec.satisfies("@15.0.0: platform=darwin"):