PGI: Add language standards for PGI

Modules/Compiler/PGI-C.cmake

@@ -2,3 +2,16 @@ include(Compiler/PGI)
 __compiler_pgi(C)
 string(APPEND CMAKE_C_FLAGS_MINSIZEREL_INIT " -DNDEBUG")
 string(APPEND CMAKE_C_FLAGS_RELEASE_INIT " -DNDEBUG")
+
+if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 12.10)
+  set(CMAKE_C90_STANDARD_COMPILE_OPTION -c89)
+  set(CMAKE_C90_EXTENSION_COMPILE_OPTION -c89)
+  set(CMAKE_C99_STANDARD_COMPILE_OPTION -c99)
+  set(CMAKE_C99_EXTENSION_COMPILE_OPTION -c99)
+  if (CMAKE_C_COMPILER_VERSION VERSION_CREATER_EQUAL 15.3)
+    set(CMAKE_C11_STANDARD_COMPILE_OPTION -c11)
+    set(CMAKE_C11_EXTENSION_COMPILE_OPTION -c11)
+  endif ()
+endif ()
+
+__compiler_check_default_language_standard(C 12.10 90)

Modules/Compiler/PGI-CXX.cmake

@@ -2,3 +2,22 @@ include(Compiler/PGI)
 __compiler_pgi(CXX)
 string(APPEND CMAKE_CXX_FLAGS_MINSIZEREL_INIT " -DNDEBUG")
 string(APPEND CMAKE_CXX_FLAGS_RELEASE_INIT " -DNDEBUG")
+
+if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 12.10)
+  set(CMAKE_CXX98_STANDARD_COMPILE_OPTION  -A)
+  set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION --gnu_extensions)
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 13.10)
+    set(CMAKE_CXX11_STANDARD_COMPILE_OPTION  --c++11 -A)
+    set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION --c++11 --gnu_extensions)
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 15.7)
+      set(CMAKE_CXX14_STANDARD_COMPILE_OPTION  --c++14 -A)
+      set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION --c++14 --gnu_extensions)
+      if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 17.1)
+        set(CMAKE_CXX17_STANDARD_COMPILE_OPTION  --c++17 -A)
+        set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION --c++17 --gnu_extensions)
+      endif()
+    endif()
+  endif()
+endif()
+
+__compiler_check_default_language_standard(CXX 12.10 98)

Modules/Compiler/PGI.cmake

@@ -8,6 +8,8 @@ if(__COMPILER_PGI)
 endif()
 set(__COMPILER_PGI 1)
 
+include(Compiler/CMakeCommonCompilerMacros)
+
 macro(__compiler_pgi lang)
   # Feature flags.
   set(CMAKE_${lang}_VERBOSE_FLAG "-v")