Add variant to allow unsupported compiler & CUDA combinations (#19736)

Sometimes users need to be able to override the conflicts in `CudaPacakge`.  This introduces a variant to enable/disable them.

1 files changed, 82 insertions, 84 deletions

diff --git a/lib/spack/spack/build_systems/cuda.py b/lib/spack/spack/build_systems/cuda.py
index b2b7783500..79d63fab10 100644
--- a/lib/spack/spack/build_systems/cuda.py
+++ b/lib/spack/spack/build_systems/cuda.py
@@ -5,6 +5,7 @@
 
 import spack.variant
 from spack.directives import conflicts, depends_on, variant
+from spack.multimethod import when
 from spack.package import PackageBase
 
 
@@ -87,90 +88,87 @@ class CudaPackage(PackageBase):
 
     # Linux x86_64 compiler conflicts from here:
     # https://gist.github.com/ax3l/9489132
-    conflicts('%gcc@5:', when='+cuda ^cuda@:7.5 target=x86_64:')
-    conflicts('%gcc@6:', when='+cuda ^cuda@:8 target=x86_64:')
-    conflicts('%gcc@7:', when='+cuda ^cuda@:9.1 target=x86_64:')
-    conflicts('%gcc@8:', when='+cuda ^cuda@:10.0.130 target=x86_64:')
-    conflicts('%gcc@9:', when='+cuda ^cuda@:10.2.89 target=x86_64:')
-    conflicts('%gcc@:4', when='+cuda ^cuda@11.0.2: target=x86_64:')
-    conflicts('%gcc@10:', when='+cuda ^cuda@:11.0.3 target=x86_64:')
-    conflicts('%gcc@11:', when='+cuda ^cuda@:11.1.0 target=x86_64:')
-    conflicts('%pgi@:14.8', when='+cuda ^cuda@:7.0.27 target=x86_64:')
-    conflicts('%pgi@:15.3,15.5:', when='+cuda ^cuda@7.5 target=x86_64:')
-    conflicts('%pgi@:16.2,16.0:16.3', when='+cuda ^cuda@8 target=x86_64:')
-    conflicts('%pgi@:15,18:', when='+cuda ^cuda@9.0:9.1 target=x86_64:')
-    conflicts('%pgi@:16,19:', when='+cuda ^cuda@9.2.88:10 target=x86_64:')
-    conflicts('%pgi@:17,20:',
-              when='+cuda ^cuda@10.1.105:10.2.89 target=x86_64:')
-    conflicts('%pgi@:17,21:',
-              when='+cuda ^cuda@11.0.2:11.1.0 target=x86_64:')
-    conflicts('%clang@:3.4', when='+cuda ^cuda@:7.5 target=x86_64:')
-    conflicts('%clang@:3.7,4:',
-              when='+cuda ^cuda@8.0:9.0 target=x86_64:')
-    conflicts('%clang@:3.7,4.1:',
-              when='+cuda ^cuda@9.1 target=x86_64:')
-    conflicts('%clang@:3.7,5.1:', when='+cuda ^cuda@9.2 target=x86_64:')
-    conflicts('%clang@:3.7,6.1:', when='+cuda ^cuda@10.0.130 target=x86_64:')
-    conflicts('%clang@:3.7,7.1:', when='+cuda ^cuda@10.1.105 target=x86_64:')
-    conflicts('%clang@:3.7,8.1:',
-              when='+cuda ^cuda@10.1.105:10.1.243 target=x86_64:')
-    conflicts('%clang@:3.2,9:', when='+cuda ^cuda@10.2.89 target=x86_64:')
-    conflicts('%clang@:5', when='+cuda ^cuda@11.0.2: target=x86_64:')
-    conflicts('%clang@10:', when='+cuda ^cuda@:11.0.3 target=x86_64:')
-    conflicts('%clang@11:', when='+cuda ^cuda@:11.1.0 target=x86_64:')
-
-    # x86_64 vs. ppc64le differ according to NVidia docs
-    # Linux ppc64le compiler conflicts from Table from the docs below:
-    # https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html
-    # https://docs.nvidia.com/cuda/archive/9.2/cuda-installation-guide-linux/index.html
-    # https://docs.nvidia.com/cuda/archive/9.1/cuda-installation-guide-linux/index.html
-    # https://docs.nvidia.com/cuda/archive/9.0/cuda-installation-guide-linux/index.html
-    # https://docs.nvidia.com/cuda/archive/8.0/cuda-installation-guide-linux/index.html
-
-    # information prior to CUDA 9 difficult to find
-    conflicts('%gcc@6:', when='+cuda ^cuda@:9 target=ppc64le:')
-    conflicts('%gcc@8:', when='+cuda ^cuda@:10.0.130 target=ppc64le:')
-    conflicts('%gcc@9:', when='+cuda ^cuda@:10.1.243 target=ppc64le:')
-    # officially, CUDA 11.0.2 only supports the system GCC 8.3 on ppc64le
-    conflicts('%gcc@:4', when='+cuda ^cuda@11.0.2: target=ppc64le:')
-    conflicts('%gcc@10:', when='+cuda ^cuda@:11.0.3 target=ppc64le:')
-    conflicts('%gcc@11:', when='+cuda ^cuda@:11.1.0 target=ppc64le:')
-    conflicts('%pgi', when='+cuda ^cuda@:8 target=ppc64le:')
-    conflicts('%pgi@:16', when='+cuda ^cuda@:9.1.185 target=ppc64le:')
-    conflicts('%pgi@:17', when='+cuda ^cuda@:10 target=ppc64le:')
-    conflicts('%clang@4:', when='+cuda ^cuda@:9.0.176 target=ppc64le:')
-    conflicts('%clang@5:', when='+cuda ^cuda@:9.1 target=ppc64le:')
-    conflicts('%clang@6:', when='+cuda ^cuda@:9.2 target=ppc64le:')
-    conflicts('%clang@7:', when='+cuda ^cuda@10.0.130 target=ppc64le:')
-    conflicts('%clang@7.1:', when='+cuda ^cuda@:10.1.105 target=ppc64le:')
-    conflicts('%clang@8.1:', when='+cuda ^cuda@:10.2.89 target=ppc64le:')
-    conflicts('%clang@:5', when='+cuda ^cuda@11.0.2: target=ppc64le:')
-    conflicts('%clang@10:', when='+cuda ^cuda@:11.0.3 target=ppc64le:')
-    conflicts('%clang@11:', when='+cuda ^cuda@:11.1.0 target=ppc64le:')
-
-    # Intel is mostly relevant for x86_64 Linux, even though it also
-    # exists for Mac OS X. No information prior to CUDA 3.2 or Intel 11.1
-    conflicts('%intel@:11.0', when='+cuda ^cuda@:3.1')
-    conflicts('%intel@:12.0', when='+cuda ^cuda@5.5:')
-    conflicts('%intel@:13.0', when='+cuda ^cuda@6.0:')
-    conflicts('%intel@:13.2', when='+cuda ^cuda@6.5:')
-    conflicts('%intel@:14.9', when='+cuda ^cuda@7:')
-    # Intel 15.x is compatible with CUDA 7 thru current CUDA
-    conflicts('%intel@16.0:', when='+cuda ^cuda@:8.0.43')
-    conflicts('%intel@17.0:', when='+cuda ^cuda@:8.0.60')
-    conflicts('%intel@18.0:', when='+cuda ^cuda@:9.9')
-    conflicts('%intel@19.0:', when='+cuda ^cuda@:10.0')
-    conflicts('%intel@19.1:', when='+cuda ^cuda@:10.1')
-    conflicts('%intel@19.2:', when='+cuda ^cuda@:11.1.0')
-
-    # XL is mostly relevant for ppc64le Linux
-    conflicts('%xl@:12,14:', when='+cuda ^cuda@:9.1')
-    conflicts('%xl@:12,14:15,17:', when='+cuda ^cuda@9.2')
-    conflicts('%xl@:12,17:', when='+cuda ^cuda@:11.1.0')
-
-    # Darwin.
-    # TODO: add missing conflicts for %apple-clang cuda@:10
-    conflicts('platform=darwin', when='+cuda ^cuda@11.0.2:')
+    with when('~allow-unsupported-compilers'):
+        conflicts('%gcc@5:', when='+cuda ^cuda@:7.5 target=x86_64:')
+        conflicts('%gcc@6:', when='+cuda ^cuda@:8 target=x86_64:')
+        conflicts('%gcc@7:', when='+cuda ^cuda@:9.1 target=x86_64:')
+        conflicts('%gcc@8:', when='+cuda ^cuda@:10.0.130 target=x86_64:')
+        conflicts('%gcc@9:', when='+cuda ^cuda@:10.2.89 target=x86_64:')
+        conflicts('%gcc@:4', when='+cuda ^cuda@11.0.2: target=x86_64:')
+        conflicts('%gcc@10:', when='+cuda ^cuda@:11.0.3 target=x86_64:')
+        conflicts('%gcc@11:', when='+cuda ^cuda@:11.1.0 target=x86_64:')
+        conflicts('%pgi@:14.8', when='+cuda ^cuda@:7.0.27 target=x86_64:')
+        conflicts('%pgi@:15.3,15.5:', when='+cuda ^cuda@7.5 target=x86_64:')
+        conflicts('%pgi@:16.2,16.0:16.3', when='+cuda ^cuda@8 target=x86_64:')
+        conflicts('%pgi@:15,18:', when='+cuda ^cuda@9.0:9.1 target=x86_64:')
+        conflicts('%pgi@:16,19:', when='+cuda ^cuda@9.2.88:10 target=x86_64:')
+        conflicts('%pgi@:17,20:', when='+cuda ^cuda@10.1.105:10.2.89 target=x86_64:')
+        conflicts('%pgi@:17,21:', when='+cuda ^cuda@11.0.2:11.1.0 target=x86_64:')
+        conflicts('%clang@:3.4', when='+cuda ^cuda@:7.5 target=x86_64:')
+        conflicts('%clang@:3.7,4:', when='+cuda ^cuda@8.0:9.0 target=x86_64:')
+        conflicts('%clang@:3.7,4.1:', when='+cuda ^cuda@9.1 target=x86_64:')
+        conflicts('%clang@:3.7,5.1:', when='+cuda ^cuda@9.2 target=x86_64:')
+        conflicts('%clang@:3.7,6.1:', when='+cuda ^cuda@10.0.130 target=x86_64:')
+        conflicts('%clang@:3.7,7.1:', when='+cuda ^cuda@10.1.105 target=x86_64:')
+        conflicts('%clang@:3.7,8.1:',
+                  when='+cuda ^cuda@10.1.105:10.1.243 target=x86_64:')
+        conflicts('%clang@:3.2,9:', when='+cuda ^cuda@10.2.89 target=x86_64:')
+        conflicts('%clang@:5', when='+cuda ^cuda@11.0.2: target=x86_64:')
+        conflicts('%clang@10:', when='+cuda ^cuda@:11.0.3 target=x86_64:')
+        conflicts('%clang@11:', when='+cuda ^cuda@:11.1.0 target=x86_64:')
+
+        # x86_64 vs. ppc64le differ according to NVidia docs
+        # Linux ppc64le compiler conflicts from Table from the docs below:
+        # https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html
+        # https://docs.nvidia.com/cuda/archive/9.2/cuda-installation-guide-linux/index.html
+        # https://docs.nvidia.com/cuda/archive/9.1/cuda-installation-guide-linux/index.html
+        # https://docs.nvidia.com/cuda/archive/9.0/cuda-installation-guide-linux/index.html
+        # https://docs.nvidia.com/cuda/archive/8.0/cuda-installation-guide-linux/index.html
+
+        # information prior to CUDA 9 difficult to find
+        conflicts('%gcc@6:', when='+cuda ^cuda@:9 target=ppc64le:')
+        conflicts('%gcc@8:', when='+cuda ^cuda@:10.0.130 target=ppc64le:')
+        conflicts('%gcc@9:', when='+cuda ^cuda@:10.1.243 target=ppc64le:')
+        # officially, CUDA 11.0.2 only supports the system GCC 8.3 on ppc64le
+        conflicts('%gcc@:4', when='+cuda ^cuda@11.0.2: target=ppc64le:')
+        conflicts('%gcc@10:', when='+cuda ^cuda@:11.0.2 target=ppc64le:')
+        conflicts('%gcc@11:', when='+cuda ^cuda@:11.1.0 target=ppc64le:')
+        conflicts('%pgi', when='+cuda ^cuda@:8 target=ppc64le:')
+        conflicts('%pgi@:16', when='+cuda ^cuda@:9.1.185 target=ppc64le:')
+        conflicts('%pgi@:17', when='+cuda ^cuda@:10 target=ppc64le:')
+        conflicts('%clang@4:', when='+cuda ^cuda@:9.0.176 target=ppc64le:')
+        conflicts('%clang@5:', when='+cuda ^cuda@:9.1 target=ppc64le:')
+        conflicts('%clang@6:', when='+cuda ^cuda@:9.2 target=ppc64le:')
+        conflicts('%clang@7:', when='+cuda ^cuda@10.0.130 target=ppc64le:')
+        conflicts('%clang@7.1:', when='+cuda ^cuda@:10.1.105 target=ppc64le:')
+        conflicts('%clang@8.1:', when='+cuda ^cuda@:10.2.89 target=ppc64le:')
+        conflicts('%clang@:5', when='+cuda ^cuda@11.0.2: target=ppc64le:')
+        conflicts('%clang@10:', when='+cuda ^cuda@:11.0.2 target=ppc64le:')
+        conflicts('%clang@11:', when='+cuda ^cuda@:11.1.0 target=ppc64le:')
+
+        # Intel is mostly relevant for x86_64 Linux, even though it also
+        # exists for Mac OS X. No information prior to CUDA 3.2 or Intel 11.1
+        conflicts('%intel@:11.0', when='+cuda ^cuda@:3.1')
+        conflicts('%intel@:12.0', when='+cuda ^cuda@5.5:')
+        conflicts('%intel@:13.0', when='+cuda ^cuda@6.0:')
+        conflicts('%intel@:13.2', when='+cuda ^cuda@6.5:')
+        conflicts('%intel@:14.9', when='+cuda ^cuda@7:')
+        # Intel 15.x is compatible with CUDA 7 thru current CUDA
+        conflicts('%intel@16.0:', when='+cuda ^cuda@:8.0.43')
+        conflicts('%intel@17.0:', when='+cuda ^cuda@:8.0.60')
+        conflicts('%intel@18.0:', when='+cuda ^cuda@:9.9')
+        conflicts('%intel@19.0:', when='+cuda ^cuda@:10.0')
+        conflicts('%intel@19.1:', when='+cuda ^cuda@:10.1')
+        conflicts('%intel@19.2:', when='+cuda ^cuda@:11.1.0')
+
+        # XL is mostly relevant for ppc64le Linux
+        conflicts('%xl@:12,14:', when='+cuda ^cuda@:9.1')
+        conflicts('%xl@:12,14:15,17:', when='+cuda ^cuda@9.2')
+        conflicts('%xl@:12,17:', when='+cuda ^cuda@:11.1.0')
+
+        # Darwin.
+        # TODO: add missing conflicts for %apple-clang cuda@:10
+        conflicts('platform=darwin', when='+cuda ^cuda@11.0.2: ')
 
     # Make sure cuda_arch can not be used without +cuda
     for value in cuda_arch_values: