Add new compiler oneapi to tune for the icx compiler which accepts most of the...

Add new compiler oneapi to tune for the icx compiler which accepts most of the flags of icc, so not really just a clang

configure.ac

@@ -114,6 +114,12 @@ if test "$enable_ipo" = "yes"; then
       : ${AR="xiar"}
       : ${LD="xild"}
       AC_MSG_RESULT([added Intel interprocedural optimization support])
+   elif test "$ax_cv_c_compiler_vendor" = "oneapi"; then
+      CFLAGS="$CFLAGS -ipo"
+      LDFLAGS="$LDFLAGS -ipo"
+      : ${AR="xiar"}
+      : ${LD="xild"}
+      AC_MSG_RESULT([added oneapi interprocedural optimization support])
    elif test "$ax_cv_c_compiler_vendor" = "gnu"; then
       CFLAGS="$CFLAGS -flto"
       LDFLAGS="$LDFLAGS -flto"
@@ -234,6 +240,8 @@ if test "x$enable_debug" = "xyes"; then
       CFLAGS="$CFLAGS $inline_EXTRA_FLAGS"
    elif test "$ax_cv_c_compiler_vendor" = "intel"; then
       CFLAGS="$CFLAGS -debug inline-debug-info"
+   elif test "$ax_cv_c_compiler_vendor" = "oneapi"; then
+      CFLAGS="$CFLAGS -debug inline-debug-info"
    fi
 fi
 

m4/ax_cc_maxopt.m4

@@ -104,7 +104,7 @@ if test "$ac_test_CFLAGS" != "set"; then
                 echo "******************************************************"])
          ;;
 
-    intel) CFLAGS="$CFLAGS -O3 -ansi-alias"
+    intel | oneapi) CFLAGS="$CFLAGS -O3 -ansi-alias"
 	if test "x$acx_maxopt_portable" = xno; then
 	  icc_archflag=unknown
 	  icc_flags=""

m4/ax_compiler_vendor.m4

@@ -71,6 +71,7 @@ AC_DEFUN([AX_COMPILER_VENDOR], [dnl
 
 	vendors="
 		intel:		__ICC,__ECC,__INTEL_COMPILER
+                oneapi:         __INTEL_LLVM_COMPILER
 		ibm:		__xlc__,__xlC__,__IBMC__,__IBMCPP__,__ibmxl__
 		pathscale:	__PATHCC__,__PATHSCALE__
 		clang:		__clang__

m4/ax_compiler_version.m4

@@ -52,6 +52,19 @@ AC_DEFUN([_AX_COMPILER_VERSION_INTEL],
     AC_MSG_FAILURE([[[$0]] unknown intel compiler version]))
   ax_cv_[]_AC_LANG_ABBREV[]_compiler_version="$_ax_[]_AC_LANG_ABBREV[]_compiler_version_major.$_ax_[]_AC_LANG_ABBREV[]_compiler_version_minor.$_ax_[]_AC_LANG_ABBREV[]_compiler_version_patch"
   ])
+AC_DEFUN([_AX_COMPILER_VERSION_ONEAPI],
+  [ dnl
+  AC_COMPUTE_INT(_ax_[]_AC_LANG_ABBREV[]_compiler_version_major,
+    [__INTEL_LLVM_COMPILER/10000],,
+    AC_MSG_FAILURE([[[$0]] unknown oneapi compiler version]))
+  AC_COMPUTE_INT(_ax_[]_AC_LANG_ABBREV[]_compiler_version_minor,
+    [(__INTEL_LLVM_COMPILER%10000)/100],,
+    AC_MSG_FAILURE([[[$0]] unknown oneapi compiler version]))
+  AC_COMPUTE_INT(_ax_[]_AC_LANG_ABBREV[]_compiler_version_patch,
+    [(__INTEL_LLVM_COMPILER%100)],,
+    AC_MSG_FAILURE([[[$0]] unknown oneapi compiler version]))
+  ax_cv_[]_AC_LANG_ABBREV[]_compiler_version="$_ax_[]_AC_LANG_ABBREV[]_compiler_version_major.$_ax_[]_AC_LANG_ABBREV[]_compiler_version_minor.$_ax_[]_AC_LANG_ABBREV[]_compiler_version_patch"
+  ])
 
 # for IBM
 AC_DEFUN([_AX_COMPILER_VERSION_IBM],
@@ -505,6 +518,7 @@ AC_DEFUN([AX_COMPILER_VERSION],[dnl
     [ dnl
       AS_CASE([$ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor],
         [intel],[_AX_COMPILER_VERSION_INTEL],
+        [oneapi],[_AX_COMPILER_VERSION_ONEAPI],
 	[ibm],[_AX_COMPILER_VERSION_IBM],
 	[pathscale],[_AX_COMPILER_VERSION_PATHSCALE],
 	[clang],[_AX_COMPILER_VERSION_CLANG],