Add conflicts/updates for HEP tools on Summit (#29556)

* Fix bad `-mfma` flag on summit

* ROOT: new version and ppc conflict

See https://github.com/root-project/root/issues/9297

var/spack/repos/builtin/packages/root/package.py

@@ -31,6 +31,7 @@ class Root(CMakePackage):
     # Development version (when more recent than production).
 
     # Production version
+    version('6.26.00', sha256='5fb9be71fdf0c0b5e5951f89c2f03fcb5e74291d043f6240fb86f5ca977d4b31')
     version('6.24.06', sha256='907f69f4baca1e4f30eeb4979598ca7599b6aa803ca046e80e25b6bbaa0ef522')
     version('6.24.02', sha256='0507e1095e279ccc7240f651d25966024325179fa85a1259b694b56723ad7c1c')
     version('6.24.00', sha256='9da30548a289211c3122d47dacb07e85d35e61067fac2be6c5a5ff7bda979989')
@@ -294,6 +295,9 @@ class Root(CMakePackage):
     # ROOT <6.14 was incompatible with Python 3.7+
     conflicts('^python@3.7:', when='@:6.13 +python')
 
+    # See https://github.com/root-project/root/issues/9297
+    conflicts('target=ppc64le:', when='@:6.24')
+
     # Incompatible variants
     conflicts('+opengl', when='~x', msg='OpenGL requires X')
     conflicts('+tmva', when='~gsl', msg='TVMA requires GSL')

var/spack/repos/builtin/packages/vdt/CMakeLists.txt.patch

@@ -1,11 +0,0 @@
---- spack-src/CMakeLists.txt.bak	2019-02-05 19:20:28.000000000 +0900
-+++ spack-src/CMakeLists.txt	2020-08-17 16:54:33.476417139 +0900
-@@ -51,7 +51,7 @@
- # SIMD and FMA instructions set-------------------------------------------------
- if (NEON)
-   message(STATUS "Using NEON instructions!")
--  set(PACKED_INSTR "-mfpu=neon ")
-+  set(PACKED_INSTR " ")
- else()
-   if (SSE AND (NOT (AVX OR AVX2) ))
-     message(STATUS "Using SSE instructions!")

var/spack/repos/builtin/packages/vdt/package.py

@@ -18,8 +18,6 @@ class Vdt(CMakePackage):
     version('0.3.7', sha256='713a7e6d76d98f3b2b56b5216e7d5906e30f17865a5c7c889968e9a0b0664949')
     version('0.3.6', sha256='fb8f6386f2cd1eeb03db43f2b5c83a172107949bb5e5e8d4dfa603660a9757b0')
 
-    patch('CMakeLists.txt.patch', when='target=aarch64:')
-
     @property
     def build_directory(self):
         d = join_path(self.stage.path, 'spack-build')
@@ -28,10 +26,18 @@ def build_directory(self):
         return d
 
     def cmake_args(self):
+        spec = self.spec
+
+        disable_features = set()
+        if spec.satisfies('target=aarch64:'):
+            disable_features.add('neon')
+        elif spec.satisfies('target=ppc64le:'):
+            disable_features.add('fma')
+
         options = []
-        for simd_feature in ('sse', 'avx', 'avx2', 'fma', 'neon'):
-            options.append("-D{0}={1}".format(
-                simd_feature.upper(),
-                "ON" if simd_feature in self.spec.target else "OFF"
+        for f in ['sse', 'avx', 'avx2', 'fma', 'neon']:
+            options.append(self.define(
+                f.upper(),
+                f not in disable_features and f in self.spec.target
             ))
         return options