From 2bb6619528c1faef3382705f9635f85ad32e6f6d Mon Sep 17 00:00:00 2001
From: Allen Byrne <50328838+byrnHDF@users.noreply.github.com>
Date: Thu, 19 Oct 2023 17:17:20 -0500
Subject: Develop intel split (#3722)

* Split intel compiler flags into sub-folders
* Update Intel options for warnings
* Mostly CMake, Autotools needs additional work
---
 config/cmake/HDFCXXCompilerFlags.cmake             | 38 ++++++---
 config/cmake/HDFCompilerFlags.cmake                | 90 +++++++++++++---------
 config/cmake/HDFFortranCompilerFlags.cmake         | 20 ++++-
 config/gnu-warnings/developer-general              |  8 --
 config/intel-cxxflags                              | 12 +--
 config/intel-fflags                                |  2 +-
 config/intel-flags                                 | 12 +--
 config/intel-warnings/15                           | 19 -----
 config/intel-warnings/18                           |  2 -
 config/intel-warnings/classic/15                   | 19 +++++
 config/intel-warnings/classic/18                   |  2 +
 config/intel-warnings/classic/developer-general    |  3 +
 config/intel-warnings/classic/general              |  1 +
 config/intel-warnings/classic/ifort-general        |  1 +
 .../intel-warnings/classic/win-developer-general   |  1 +
 config/intel-warnings/classic/win-general          |  1 +
 config/intel-warnings/classic/win-ifort-general    |  1 +
 config/intel-warnings/developer-general            | 11 ---
 config/intel-warnings/general                      |  1 -
 config/intel-warnings/ifort-general                |  1 -
 config/intel-warnings/oneapi/developer-general     |  2 +
 config/intel-warnings/oneapi/general               |  1 +
 config/intel-warnings/oneapi/ifort-general         |  1 +
 config/intel-warnings/oneapi/win-developer-general |  2 +
 config/intel-warnings/oneapi/win-general           |  1 +
 config/intel-warnings/oneapi/win-ifort-general     |  1 +
 config/intel-warnings/win-developer-general        |  1 -
 config/intel-warnings/win-general                  |  1 -
 config/intel-warnings/win-ifort-general            |  1 -
 29 files changed, 151 insertions(+), 105 deletions(-)
 delete mode 100644 config/intel-warnings/15
 delete mode 100644 config/intel-warnings/18
 create mode 100644 config/intel-warnings/classic/15
 create mode 100644 config/intel-warnings/classic/18
 create mode 100644 config/intel-warnings/classic/developer-general
 create mode 100644 config/intel-warnings/classic/general
 create mode 100644 config/intel-warnings/classic/ifort-general
 create mode 100644 config/intel-warnings/classic/win-developer-general
 create mode 100644 config/intel-warnings/classic/win-general
 create mode 100644 config/intel-warnings/classic/win-ifort-general
 delete mode 100644 config/intel-warnings/developer-general
 delete mode 100644 config/intel-warnings/general
 delete mode 100644 config/intel-warnings/ifort-general
 create mode 100644 config/intel-warnings/oneapi/developer-general
 create mode 100644 config/intel-warnings/oneapi/general
 create mode 100644 config/intel-warnings/oneapi/ifort-general
 create mode 100644 config/intel-warnings/oneapi/win-developer-general
 create mode 100644 config/intel-warnings/oneapi/win-general
 create mode 100644 config/intel-warnings/oneapi/win-ifort-general
 delete mode 100644 config/intel-warnings/win-developer-general
 delete mode 100644 config/intel-warnings/win-general
 delete mode 100644 config/intel-warnings/win-ifort-general

diff --git a/config/cmake/HDFCXXCompilerFlags.cmake b/config/cmake/HDFCXXCompilerFlags.cmake
index 13f712d..dd120c9 100644
--- a/config/cmake/HDFCXXCompilerFlags.cmake
+++ b/config/cmake/HDFCXXCompilerFlags.cmake
@@ -21,7 +21,7 @@ message (VERBOSE "Warnings Configuration: CXX default: ${CMAKE_CXX_FLAGS}")
 #-----------------------------------------------------------------------------
 # Compiler specific flags : Shouldn't there be compiler tests for these
 #-----------------------------------------------------------------------------
-if (WIN32 AND CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+if (WIN32 AND (CMAKE_CXX_COMPILER_ID STREQUAL "Intel" OR CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM"))
   set (_INTEL_WINDOWS 1)
 endif ()
 
@@ -130,16 +130,16 @@ else ()
   # warnings that are emitted. If you need it, add it at configure time.
   if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
     if (_INTEL_WINDOWS)
-      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/win-general")
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-general")
     else ()
-      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/general")
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/general")
     endif()
     if (NOT _INTEL_WINDOWS)
       if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 15.0)
-        ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/15")
+        ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/15")
       endif()
       if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
-        ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/18")
+        ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/18")
       endif()
     endif()
   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
@@ -149,7 +149,13 @@ else ()
       ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/cxx-general")
       ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/cxx-error-general")
     endif ()
-  elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-general")
+    else ()
+      ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/general")
+    endif()
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (HDF5_CMAKE_CXX_FLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/general")
   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "PGI")
     list (APPEND HDF5_CMAKE_CXX_FLAGS "-Minform=inform")
@@ -164,18 +170,28 @@ endif ()
 if (HDF5_ENABLE_DEV_WARNINGS)
   message (STATUS "....HDF5 developer group warnings are enabled")
   if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/developer-general")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-developer-general")
+    else ()
+      ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/developer-general")
+    endif()
   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     # Use the C warnings as CXX warnings are the same
     ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-general")
-  elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-developer-general")
+    else ()
+      ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/developer-general")
+    endif()
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/developer-general")
   endif ()
 else ()
   if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     # Use the C warnings as CXX warnings are the same
     ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-general")
-  elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (H5_CXXFLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/no-developer-general")
   endif ()
 endif ()
@@ -307,6 +323,8 @@ if (HDF5_ENABLE_SYMBOLS MATCHES "YES")
   if (CMAKE_CXX_COMPILER_LOADED)
     if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND NOT _INTEL_WINDOWS)
       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+    elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM" AND NOT _INTEL_WINDOWS)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
     elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
     endif ()
@@ -315,6 +333,8 @@ elseif (HDF5_ENABLE_SYMBOLS MATCHES "NO")
   if (CMAKE_CXX_COMPILER_LOADED)
     if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND NOT _INTEL_WINDOWS)
       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,-s")
+    elseif (CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM" AND NOT _INTEL_WINDOWS)
+       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,-s")
     elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -s")
     endif ()
diff --git a/config/cmake/HDFCompilerFlags.cmake b/config/cmake/HDFCompilerFlags.cmake
index a6bce98..e7b9337 100644
--- a/config/cmake/HDFCompilerFlags.cmake
+++ b/config/cmake/HDFCompilerFlags.cmake
@@ -9,8 +9,8 @@
 # If you do not have access to either file, you may request a copy from
 # help@hdfgroup.org.
 #
-set(CMAKE_C_STANDARD 99)
-set(CMAKE_C_STANDARD_REQUIRED TRUE)
+set (CMAKE_C_STANDARD 99)
+set (CMAKE_C_STANDARD_REQUIRED TRUE)
 
 set (CMAKE_C_FLAGS "${CMAKE_C99_STANDARD_COMPILE_OPTION} ${CMAKE_C_FLAGS}")
 set (CMAKE_C_FLAGS "${CMAKE_C_SANITIZER_FLAGS} ${CMAKE_C_FLAGS}")
@@ -18,45 +18,45 @@ message (VERBOSE "Warnings Configuration: C default: ${CMAKE_C_FLAGS}")
 #-----------------------------------------------------------------------------
 # Compiler specific flags : Shouldn't there be compiler tests for these
 #-----------------------------------------------------------------------------
-if(WIN32 AND CMAKE_C_COMPILER_ID STREQUAL "Intel")
-  set(_INTEL_WINDOWS 1)
-endif()
+if (WIN32 AND (CMAKE_C_COMPILER_ID STREQUAL "Intel" OR CMAKE_C_COMPILER_ID MATCHES "IntelLLVM"))
+  set (_INTEL_WINDOWS 1)
+endif ()
 
-if(WIN32 AND CMAKE_C_COMPILER_ID MATCHES "[Cc]lang" AND "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
-  set(_CLANG_MSVC_WINDOWS 1)
-endif()
+if (WIN32 AND CMAKE_C_COMPILER_ID MATCHES "[Cc]lang" AND "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
+  set (_CLANG_MSVC_WINDOWS 1)
+endif ()
 
 # Disable deprecation warnings for standard C functions.
 # really only needed for newer versions of VS, but should
 # not hurt other versions, and this will work into the
 # future
-if(MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
-  add_definitions(-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
-endif()
+if (MSVC OR _INTEL_WINDOWS OR _CLANG_MSVC_WINDOWS)
+  add_definitions (-D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE)
+endif ()
 
-if(MSVC)
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
-endif()
+if (MSVC)
+  set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stack:10000000")
+endif ()
 
 # MSVC 14.28 enables C5105, but the Windows SDK 10.0.18362.0 triggers it.
-if(CMAKE_C_COMPILER_ID STREQUAL "MSVC" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 19.28)
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -wd5105")
-endif()
+if (CMAKE_C_COMPILER_ID STREQUAL "MSVC" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 19.28)
+  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -wd5105")
+endif ()
 
 if(_CLANG_MSVC_WINDOWS AND "x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Xlinker -stack:20000000")
 endif()
 
-if(CMAKE_C_COMPILER_ID STREQUAL "NVHPC" )
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Minform=warn")
+if (CMAKE_C_COMPILER_ID STREQUAL "NVHPC" )
+  set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Minform=warn")
   if (NOT ${HDF_CFG_NAME} MATCHES "Debug" AND NOT ${HDF_CFG_NAME} MATCHES "Developer")
     if (NOT ${HDF_CFG_NAME} MATCHES "RelWithDebInfo")
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s")
+      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -s")
     endif ()
   else ()
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Mbounds -g")
+    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Mbounds -g")
   endif ()
-endif()
+endif ()
 
 if (CMAKE_COMPILER_IS_GNUCC)
   set (CMAKE_C_FLAGS "${CMAKE_ANSI_CFLAGS} ${CMAKE_C_FLAGS}")
@@ -146,20 +146,20 @@ else ()
   # warnings that are emitted. If you need it, add it at configure time.
   if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
     if (_INTEL_WINDOWS)
-      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/win-general")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-general")
     else ()
-      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/general")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/general")
     endif()
     if (NOT _INTEL_WINDOWS)
-      if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 15.0)
-        ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/15")
-      endif()
+      if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 15.0)
+        ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/15")
+      endif ()
       # this is just a failsafe
       list (APPEND H5_CFLAGS "-finline-functions")
-      if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 18.0)
-        ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/18")
-      endif()
-    endif()
+      if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 18.0)
+        ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/18")
+      endif ()
+    endif ()
   elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU")
     # Add general CFlags for GCC versions 4.8 and above
     if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.8)
@@ -169,7 +169,15 @@ else ()
     # gcc automatically inlines based on the optimization level
     # this is just a failsafe
     list (APPEND H5_CFLAGS "-finline-functions")
-  elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-general")
+    else ()
+      # this is just a failsafe
+      list (APPEND H5_CFLAGS "-finline-functions")
+      ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/general")
+    endif ()
+  elseif (CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (HDF5_CMAKE_C_FLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/general")
     ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/error-general")
   elseif (CMAKE_C_COMPILER_ID STREQUAL "PGI")
@@ -191,13 +199,19 @@ if (HDF5_ENABLE_DEV_WARNINGS)
   message (STATUS "....HDF5 developer group warnings are enabled")
   if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
     if (_INTEL_WINDOWS)
-      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/win-developer-general")
+      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-developer-general")
     else ()
-      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/developer-general")
+      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/developer-general")
     endif ()
   elseif (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.8)
     ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/developer-general")
-  elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-developer-general")
+    else ()
+      ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/developer-general")
+    endif ()
+  elseif (CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/developer-general")
   endif ()
 
@@ -211,12 +225,16 @@ if (HDF5_ENABLE_DEV_WARNINGS)
       list (APPEND H5_CFLAGS "-Winline")
     elseif (CMAKE_C_COMPILER_ID STREQUAL "Intel" AND NOT _INTEL_WINDOWS)
       list (APPEND H5_CFLAGS "-Winline")
+    elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM" AND NOT _INTEL_WINDOWS)
+      list (APPEND H5_CFLAGS "-Winline")
+    elseif (CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
+      list (APPEND H5_CFLAGS "-Winline")
     endif ()
   endif ()
 else ()
   if (CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 4.8)
     ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/no-developer-general")
-  elseif (CMAKE_C_COMPILER_ID MATCHES "IntelLLVM" OR CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
+  elseif (CMAKE_C_COMPILER_ID MATCHES "[Cc]lang")
     ADD_H5_FLAGS (H5_CFLAGS "${HDF5_SOURCE_DIR}/config/clang-warnings/no-developer-general")
   endif ()
 endif ()
diff --git a/config/cmake/HDFFortranCompilerFlags.cmake b/config/cmake/HDFFortranCompilerFlags.cmake
index f207c70..8ac3f49 100644
--- a/config/cmake/HDFFortranCompilerFlags.cmake
+++ b/config/cmake/HDFFortranCompilerFlags.cmake
@@ -23,6 +23,8 @@ if (HDF5_DISABLE_COMPILER_WARNINGS)
     set (HDF5_WARNINGS_BLOCKED 1)
     if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
       set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} /warn:none")
+    elseif (CMAKE_Fortran_COMPILER_ID MATCHES "IntelLLVM")
+      set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} /warn:none")
     endif ()
   endif ()
   if (WIN32)
@@ -70,7 +72,11 @@ endif ()
 if (NOT MSVC AND NOT MINGW)
   # General flags
   if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
-    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/ifort-general")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-ifort-general")
+    else ()
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/ifort-general")
+    endif()
     list (APPEND HDF5_CMAKE_Fortran_FLAGS "-free")
   elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
     ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/gnu-warnings/gfort-general")
@@ -85,6 +91,13 @@ if (NOT MSVC AND NOT MINGW)
     else ()
       list (APPEND HDF5_CMAKE_Fortran_FLAGS "-std=f2008")
     endif ()
+  elseif (CMAKE_Fortran_COMPILER_ID MATCHES "IntelLLVM")
+    if (_INTEL_WINDOWS)
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-ifort-general")
+    else ()
+      ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/ifort-general")
+    endif()
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "-free")
   elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "PGI")
     list (APPEND HDF5_CMAKE_Fortran_FLAGS "-Mfreeform" "-Mdclchk" "-Mstandard" "-Mallocatable=03")
   endif ()
@@ -135,7 +148,10 @@ if (NOT MSVC AND NOT MINGW)
   endif ()
 else ()
   if (CMAKE_Fortran_COMPILER_ID STREQUAL "Intel")
-    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/win-ifort-general")
+    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/classic/win-ifort-general")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "/stand:f03" "/free")
+  elseif (CMAKE_Fortran_COMPILER_ID MATCHES "IntelLLVM")
+    ADD_H5_FLAGS (HDF5_CMAKE_Fortran_FLAGS "${HDF5_SOURCE_DIR}/config/intel-warnings/oneapi/win-ifort-general")
     list (APPEND HDF5_CMAKE_Fortran_FLAGS "/stand:f03" "/free")
   endif ()
 endif ()
diff --git a/config/gnu-warnings/developer-general b/config/gnu-warnings/developer-general
index 79ecd6a..af70172 100644
--- a/config/gnu-warnings/developer-general
+++ b/config/gnu-warnings/developer-general
@@ -7,11 +7,3 @@
 -Wswitch-enum
 -Wunsafe-loop-optimizations
 -Wunused-macros
-# -Winline warnings aren't included here because, for at least
-# GNU compilers, this flag appears to conflict specifically with
-# the -Og optimization level flag added for Debug and Developer
-# builds and will produce warnings about functions not being
-# considered for inlining. The flag will be added to the list
-# of compiler flags separately if developer warnings are enabled
-# and the build type is not Debug or Developer
-#-Winline
diff --git a/config/intel-cxxflags b/config/intel-cxxflags
index 107b087..40a3f0e 100644
--- a/config/intel-cxxflags
+++ b/config/intel-cxxflags
@@ -129,15 +129,15 @@ if test "X-icpc" = "X-$cxx_vendor"; then
 
     # Add various general warning flags in intel-warnings.
     # Use the C warnings as CXX warnings are the same
-    H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments general)"
+    H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments classic/general)"
 
     ######################
     # Developer warnings #
     ######################
 
     # Use the C warnings as CXX warnings are the same
-    #NO_DEVELOPER_WARNING_CXXFLAGS=$(load_intel_arguments no-developer-general)
-    #DEVELOPER_WARNING_CXXFLAGS=$(load_intel_arguments developer-general)
+    #NO_DEVELOPER_WARNING_CXXFLAGS=$(load_intel_arguments classic/no-developer-general)
+    #DEVELOPER_WARNING_CXXFLAGS=$(load_intel_arguments classic/developer-general)
 
     #############################
     # Version-specific warnings #
@@ -157,19 +157,19 @@ if test "X-icpc" = "X-$cxx_vendor"; then
     # intel >= 15
     if test $cxx_vers_major -ge 15; then
         # Use the C warnings as CXX warnings are the same
-        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments 15)"
+        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments classic/15)"
     fi
 
     # intel >= 18
     if test $cxx_vers_major -ge 18; then
         # Use the C warnings as CXX warnings are the same
-        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments 18)"
+        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments classic/18)"
     fi
 
     # intel <= 19
     if test $cxx_vers_major -le 19; then
         # Use the C warnings as CXX warnings are the same
-        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments general-19)"
+        H5_CXXFLAGS="$H5_CXXFLAGS $(load_intel_arguments classic/general-19)"
     fi
 
     #################
diff --git a/config/intel-fflags b/config/intel-fflags
index ad1ce7c..b6307c1 100644
--- a/config/intel-fflags
+++ b/config/intel-fflags
@@ -123,7 +123,7 @@ if test "X-ifort" = "X-$f9x_vendor"; then
     ###########
 
     H5_FCFLAGS="$H5_FCFLAGS -free"
-    H5_FCFLAGS="$H5_FCFLAGS $(load_intel_arguments ifort-general)"
+    H5_FCFLAGS="$H5_FCFLAGS $(load_intel_arguments classic/ifort-general)"
 
     #############################
     # Version-specific warnings #
diff --git a/config/intel-flags b/config/intel-flags
index fbec7ef..134452c 100644
--- a/config/intel-flags
+++ b/config/intel-flags
@@ -127,14 +127,14 @@ if test "X-icc" = "X-$cc_vendor"; then
     ###########
 
     # Add various general warning flags in intel-warnings.
-    H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments general)"
+    H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments classic/general)"
 
     ######################
     # Developer warnings #
     ######################
 
-    #NO_DEVELOPER_WARNING_CFLAGS=$(load_intel_arguments no-developer-general)
-    #DEVELOPER_WARNING_CFLAGS=$(load_intel_arguments developer-general)
+    #NO_DEVELOPER_WARNING_CFLAGS=$(load_intel_arguments classic/no-developer-general)
+    #DEVELOPER_WARNING_CFLAGS=$(load_intel_arguments classic/developer-general)
 
     #############################
     # Version-specific warnings #
@@ -153,18 +153,18 @@ if test "X-icc" = "X-$cc_vendor"; then
 
     # intel >= 15
     if test $cc_vers_major -ge 15; then
-        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments 15)"
+        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments classic/15)"
     fi
 
     # intel >= 18
     if test $cc_vers_major -ge 18; then
-        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments 18)"
+        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments classic/18)"
     fi
 
     # intel <= 19
     # this file has warnings only available before oneapi versions
     if test $cc_vers_major -le 19; then
-        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments general-19)"
+        H5_CFLAGS="$H5_CFLAGS $(load_intel_arguments classic/general-19)"
     fi
 
     #################
diff --git a/config/intel-warnings/15 b/config/intel-warnings/15
deleted file mode 100644
index 6746f97..0000000
--- a/config/intel-warnings/15
+++ /dev/null
@@ -1,19 +0,0 @@
--Wcomment
--Wdeprecated
--Wextra-tokens
--Wformat
--Wformat-security
--Wmain
--Wmissing-declarations
--Wmissing-prototypes
--Wp64
--Wpointer-arith
--Wreturn-type
--Wshadow
--Wstrict-prototypes
--Wtrigraphs
--Wuninitialized
--Wunknown-pragmas
--Wunused-function
--Wunused-variable
--Wwrite-strings
diff --git a/config/intel-warnings/18 b/config/intel-warnings/18
deleted file mode 100644
index 02bcdea..0000000
--- a/config/intel-warnings/18
+++ /dev/null
@@ -1,2 +0,0 @@
--Wic-pointer
--Wsign-compare
diff --git a/config/intel-warnings/classic/15 b/config/intel-warnings/classic/15
new file mode 100644
index 0000000..6746f97
--- /dev/null
+++ b/config/intel-warnings/classic/15
@@ -0,0 +1,19 @@
+-Wcomment
+-Wdeprecated
+-Wextra-tokens
+-Wformat
+-Wformat-security
+-Wmain
+-Wmissing-declarations
+-Wmissing-prototypes
+-Wp64
+-Wpointer-arith
+-Wreturn-type
+-Wshadow
+-Wstrict-prototypes
+-Wtrigraphs
+-Wuninitialized
+-Wunknown-pragmas
+-Wunused-function
+-Wunused-variable
+-Wwrite-strings
diff --git a/config/intel-warnings/classic/18 b/config/intel-warnings/classic/18
new file mode 100644
index 0000000..02bcdea
--- /dev/null
+++ b/config/intel-warnings/classic/18
@@ -0,0 +1,2 @@
+-Wic-pointer
+-Wsign-compare
diff --git a/config/intel-warnings/classic/developer-general b/config/intel-warnings/classic/developer-general
new file mode 100644
index 0000000..6f4e9e9
--- /dev/null
+++ b/config/intel-warnings/classic/developer-general
@@ -0,0 +1,3 @@
+-Wreorder
+-Wport
+-Wstrict-aliasing
diff --git a/config/intel-warnings/classic/general b/config/intel-warnings/classic/general
new file mode 100644
index 0000000..bd866b6
--- /dev/null
+++ b/config/intel-warnings/classic/general
@@ -0,0 +1 @@
+-Wall
diff --git a/config/intel-warnings/classic/ifort-general b/config/intel-warnings/classic/ifort-general
new file mode 100644
index 0000000..1644c7c
--- /dev/null
+++ b/config/intel-warnings/classic/ifort-general
@@ -0,0 +1 @@
+-warn all
diff --git a/config/intel-warnings/classic/win-developer-general b/config/intel-warnings/classic/win-developer-general
new file mode 100644
index 0000000..6cd7ed7
--- /dev/null
+++ b/config/intel-warnings/classic/win-developer-general
@@ -0,0 +1 @@
+/Wport
diff --git a/config/intel-warnings/classic/win-general b/config/intel-warnings/classic/win-general
new file mode 100644
index 0000000..ef54b2b
--- /dev/null
+++ b/config/intel-warnings/classic/win-general
@@ -0,0 +1 @@
+/Wall
diff --git a/config/intel-warnings/classic/win-ifort-general b/config/intel-warnings/classic/win-ifort-general
new file mode 100644
index 0000000..a335959
--- /dev/null
+++ b/config/intel-warnings/classic/win-ifort-general
@@ -0,0 +1 @@
+/warn:all
diff --git a/config/intel-warnings/developer-general b/config/intel-warnings/developer-general
deleted file mode 100644
index 861218e..0000000
--- a/config/intel-warnings/developer-general
+++ /dev/null
@@ -1,11 +0,0 @@
--Wreorder
--Wport
--Wstrict-aliasing
-# -Winline warnings aren't included here because, for at least
-# GNU compilers, this flag appears to conflict specifically with
-# the -Og optimization level flag added for Debug and Developer
-# builds and will produce warnings about functions not being
-# considered for inlining. The flag will be added to the list
-# of compiler flags separately if developer warnings are enabled
-# and the build type is not Debug or Developer
-#-Winline
diff --git a/config/intel-warnings/general b/config/intel-warnings/general
deleted file mode 100644
index bd866b6..0000000
--- a/config/intel-warnings/general
+++ /dev/null
@@ -1 +0,0 @@
--Wall
diff --git a/config/intel-warnings/ifort-general b/config/intel-warnings/ifort-general
deleted file mode 100644
index 1644c7c..0000000
--- a/config/intel-warnings/ifort-general
+++ /dev/null
@@ -1 +0,0 @@
--warn all
diff --git a/config/intel-warnings/oneapi/developer-general b/config/intel-warnings/oneapi/developer-general
new file mode 100644
index 0000000..122c33d
--- /dev/null
+++ b/config/intel-warnings/oneapi/developer-general
@@ -0,0 +1,2 @@
+-Wreorder
+-Wstrict-aliasing
diff --git a/config/intel-warnings/oneapi/general b/config/intel-warnings/oneapi/general
new file mode 100644
index 0000000..bd866b6
--- /dev/null
+++ b/config/intel-warnings/oneapi/general
@@ -0,0 +1 @@
+-Wall
diff --git a/config/intel-warnings/oneapi/ifort-general b/config/intel-warnings/oneapi/ifort-general
new file mode 100644
index 0000000..1644c7c
--- /dev/null
+++ b/config/intel-warnings/oneapi/ifort-general
@@ -0,0 +1 @@
+-warn all
diff --git a/config/intel-warnings/oneapi/win-developer-general b/config/intel-warnings/oneapi/win-developer-general
new file mode 100644
index 0000000..ba86a0f
--- /dev/null
+++ b/config/intel-warnings/oneapi/win-developer-general
@@ -0,0 +1,2 @@
+/Wreorder
+/Wstrict-aliasing
diff --git a/config/intel-warnings/oneapi/win-general b/config/intel-warnings/oneapi/win-general
new file mode 100644
index 0000000..ef54b2b
--- /dev/null
+++ b/config/intel-warnings/oneapi/win-general
@@ -0,0 +1 @@
+/Wall
diff --git a/config/intel-warnings/oneapi/win-ifort-general b/config/intel-warnings/oneapi/win-ifort-general
new file mode 100644
index 0000000..a335959
--- /dev/null
+++ b/config/intel-warnings/oneapi/win-ifort-general
@@ -0,0 +1 @@
+/warn:all
diff --git a/config/intel-warnings/win-developer-general b/config/intel-warnings/win-developer-general
deleted file mode 100644
index 6cd7ed7..0000000
--- a/config/intel-warnings/win-developer-general
+++ /dev/null
@@ -1 +0,0 @@
-/Wport
diff --git a/config/intel-warnings/win-general b/config/intel-warnings/win-general
deleted file mode 100644
index ef54b2b..0000000
--- a/config/intel-warnings/win-general
+++ /dev/null
@@ -1 +0,0 @@
-/Wall
diff --git a/config/intel-warnings/win-ifort-general b/config/intel-warnings/win-ifort-general
deleted file mode 100644
index a335959..0000000
--- a/config/intel-warnings/win-ifort-general
+++ /dev/null
@@ -1 +0,0 @@
-/warn:all
-- 
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