Require at least gcc7

Fixes: NVIDIA#3267
bernhardmgruber · Jan 8, 2025 · 952683b · 952683b
1 parent 3d53514
commit 952683b
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Showing 4 changed files with 10 additions and 9 deletions.
diff --git a/README.md b/README.md
@@ -260,6 +260,8 @@ Unless otherwise specified, CCCL supports the same host compilers as the latest
 - [Linux](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#host-compiler-support-policy)
 - [Windows](https://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/index.html#system-requirements)
 
+For GCC on Linux, at least 7.x is required.
+
 When using older CUDA Toolkits, we also only support the host compilers of the latest CUDA Toolkit,
 but at least the most recent host compiler of any supported older CUDA Toolkit.
 

diff --git a/ci/matrix.yaml b/ci/matrix.yaml
@@ -11,7 +11,7 @@ workflows:
 
   pull_request:
     # Old CTK
-    - {jobs: ['build'], std: 'minmax', ctk: '11.1', cxx: ['gcc6', 'gcc9', 'clang9', 'msvc2017']}
+    - {jobs: ['build'], std: 'minmax', ctk: '11.1', cxx: ['gcc7', 'gcc9', 'clang9', 'msvc2017']}
     # Current CTK build-only
     - {jobs: ['build'], std: [11, 14], cxx: ['gcc7', 'clang9']}
     - {jobs: ['build'], std: 'max', cxx: ['gcc8', 'gcc9', 'gcc10', 'gcc11', 'gcc12']}
@@ -55,7 +55,7 @@ workflows:
     # Python and c/parallel jobs:
     - {jobs: ['test'], project: ['cccl_c_parallel', 'python'], ctk: '12.6'}
     # cccl-infra:
-    - {jobs: ['infra'], project: 'cccl', ctk: '11.1', cxx: ['gcc6',  'clang9']}
+    - {jobs: ['infra'], project: 'cccl', ctk: '11.1', cxx: ['gcc7',  'clang9']}
     - {jobs: ['infra'], project: 'cccl', ctk: '12.0', cxx: ['gcc12', 'clang14']}
     - {jobs: ['infra'], project: 'cccl', ctk: 'curr', cxx: ['gcc',   'clang']}
 
@@ -65,7 +65,7 @@ workflows:
     - {jobs: ['test_gpu'],  project: 'thrust', cmake_options: '-DTHRUST_DISPATCH_TYPE=Force32bit'}
     - {jobs: ['test_gpu'],  project: 'thrust', cmake_options: '-DTHRUST_DISPATCH_TYPE=Force64bit'}
     # Old CTK
-    - {jobs: ['build'], std: 'all', ctk: '11.1', cxx: ['gcc6', 'gcc7', 'gcc8', 'gcc9', 'clang9', 'msvc2017']}
+    - {jobs: ['build'], std: 'all', ctk: '11.1', cxx: ['gcc7', 'gcc8', 'gcc9', 'clang9', 'msvc2017']}
     - {jobs: ['build'], std: 'all', ctk: '11.8', cxx: ['gcc11'], sm: '60;70;80;90'}
     # Current CTK build-only
     - {jobs: ['build'], std: 'all', cxx: ['gcc7', 'gcc8', 'gcc9', 'gcc10', 'gcc11', 'gcc12']}
@@ -96,7 +96,7 @@ workflows:
     - {jobs: ['test'],  project: 'cudax', ctk: [        'curr'], std: 'all', cxx: ['clang18']}
 
 #  # These are waiting on the NVKS nodes:
-#    - {jobs: ['test'],  ctk: '11.1', gpu: 'v100',     sm: 'gpu', cxx: 'gcc6',    std: [11]}
+#    - {jobs: ['test'],  ctk: '11.1', gpu: 'v100',     sm: 'gpu', cxx: 'gcc7',    std: [11]}
 #    - {jobs: ['test'],  ctk: '11.1', gpu: 't4',       sm: 'gpu', cxx: 'clang9',  std: [17]}
 #    - {jobs: ['test'],  ctk: '11.8', gpu: 'rtx2080',  sm: 'gpu', cxx: 'gcc11',   std: [17]}
 #    - {jobs: ['test'],  ctk: 'curr', gpu: 'rtxa6000', sm: 'gpu', cxx: 'gcc7',    std: [14]}
@@ -151,7 +151,6 @@ host_compilers:
     container_tag: 'gcc'
     exe: 'g++'
     versions:
-      6:  { stds: [11, 14,       ] }
       7:  { stds: [11, 14, 17,   ] }
       8:  { stds: [11, 14, 17,   ] }
       9:  { stds: [11, 14, 17,   ] }

diff --git a/cub/cub/util_cpp_dialect.cuh b/cub/cub/util_cpp_dialect.cuh
@@ -80,8 +80,8 @@
 #  ifndef CCCL_IGNORE_DEPRECATED_COMPILER
 
 // Compiler checks:
-#    if _CCCL_COMPILER(GCC, <, 5)
-CUB_COMPILER_DEPRECATION(GCC 5.0);
+#    if _CCCL_COMPILER(GCC, <, 7)
+CUB_COMPILER_DEPRECATION(GCC 7.0);
 #    elif _CCCL_COMPILER(CLANG, <, 7)
 CUB_COMPILER_DEPRECATION(Clang 7.0);
 #    elif _CCCL_COMPILER(MSVC, <, 19, 10)

diff --git a/thrust/thrust/detail/config/cpp_dialect.h b/thrust/thrust/detail/config/cpp_dialect.h
@@ -68,8 +68,8 @@
 #ifndef CCCL_IGNORE_DEPRECATED_COMPILER
 
 // Compiler checks:
-#  if _CCCL_COMPILER(GCC, <, 5)
-THRUST_COMPILER_DEPRECATION(GCC 5.0);
+#  if _CCCL_COMPILER(GCC, <, 7)
+THRUST_COMPILER_DEPRECATION(GCC 7.0);
 #  elif _CCCL_COMPILER(CLANG, <, 7)
 THRUST_COMPILER_DEPRECATION(Clang 7.0);
 #  elif _CCCL_COMPILER(MSVC, <, 19, 10)