From 1a828043b76d12882bea266148af0e73bb1de9d7 Mon Sep 17 00:00:00 2001
From: Robert Maynard <rmaynard@nvidia.com>
Date: Wed, 6 Oct 2021 16:21:29 -0400
Subject: NVHPC: only use '-MD' for the C and CXX languages

CMake shouldn't use '-MD' for nvfortran to generate dependency information.

Fixes #22723
---
 Modules/Compiler/NVHPC-C.cmake   | 11 +++++++++++
 Modules/Compiler/NVHPC-CXX.cmake | 10 ++++++++++
 Modules/Compiler/NVHPC.cmake     | 12 ------------
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/Modules/Compiler/NVHPC-C.cmake b/Modules/Compiler/NVHPC-C.cmake
index e37aad5..9295abd 100644
--- a/Modules/Compiler/NVHPC-C.cmake
+++ b/Modules/Compiler/NVHPC-C.cmake
@@ -9,4 +9,15 @@ if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 20.11)
   set(CMAKE_C17_EXTENSION_COMPILE_OPTION -std=gnu17)
 endif()
 
+if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 21.07)
+  set(CMAKE_DEPFILE_FLAGS_C "-MD -MT <DEP_TARGET> -MF <DEP_FILE>")
+  set(CMAKE_C_DEPFILE_FORMAT gcc)
+  set(CMAKE_C_DEPENDS_USE_COMPILER TRUE)
+else()
+  # Before NVHPC 21.07 the `-MD` flag implicitly
+  # implies `-E` and therefore compilation and dependency generation
+  # can't occur in the same invocation
+  set(CMAKE_C_DEPENDS_EXTRA_COMMANDS "<CMAKE_C_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -x c -M <SOURCE> -MT <OBJECT> -MD<DEP_FILE>")
+endif()
+
 __compiler_nvhpc(C)
diff --git a/Modules/Compiler/NVHPC-CXX.cmake b/Modules/Compiler/NVHPC-CXX.cmake
index 534e822..59ba7bf 100644
--- a/Modules/Compiler/NVHPC-CXX.cmake
+++ b/Modules/Compiler/NVHPC-CXX.cmake
@@ -9,4 +9,14 @@ if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 20.11)
   set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION -std=gnu++20)
 endif()
 
+if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 21.07)
+  set(CMAKE_DEPFILE_FLAGS_CXX "-MD -MT <DEP_TARGET> -MF <DEP_FILE>")
+  set(CMAKE_CXX_DEPFILE_FORMAT gcc)
+  set(CMAKE_CXX_DEPENDS_USE_COMPILER TRUE)
+else()
+  # Before NVHPC 21.07 the `-MD` flag implicitly
+  # implies `-E` and therefore compilation and dependency generation
+  # can't occur in the same invocation
+  set(CMAKE_CXX_DEPENDS_EXTRA_COMMANDS "<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -x c++ -M <SOURCE> -MT <OBJECT> -MD<DEP_FILE>")
+endif()
 __compiler_nvhpc(CXX)
diff --git a/Modules/Compiler/NVHPC.cmake b/Modules/Compiler/NVHPC.cmake
index a85df71..7048670 100644
--- a/Modules/Compiler/NVHPC.cmake
+++ b/Modules/Compiler/NVHPC.cmake
@@ -12,16 +12,4 @@ include(Compiler/PGI)
 
 macro(__compiler_nvhpc lang)
   # Logic specific to NVHPC.
-
-  if(CMAKE_${lang}_COMPILER_VERSION VERSION_GREATER_EQUAL 21.07)
-    set(CMAKE_DEPFILE_FLAGS_${lang} "-MD -MT <DEP_TARGET> -MF <DEP_FILE>")
-    set(CMAKE_${lang}_DEPFILE_FORMAT gcc)
-    set(CMAKE_${lang}_DEPENDS_USE_COMPILER TRUE)
-  else()
-    # Before NVHPC 21.07 the `-MD` flag implicitly
-    # implies `-E` and therefore compilation and dependency generation
-    # can't occur in the same invocation
-    set(CMAKE_${lang}_DEPENDS_EXTRA_COMMANDS "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> ${CMAKE_${lang}_COMPILE_OPTIONS_EXPLICIT_LANGUAGE} -M <SOURCE> -MT <OBJECT> -MD<DEP_FILE>")
-  endif()
-
 endmacro()
-- 
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