Improve flang-new identification and add CI job for it on OSX-x86_64 (#5103)

* AzureCI: Add LLVM/flang-new build on OSX-x86_64
* distinguish classic flang from flang-new in name based recognition

Author: martin-frbg

azure-pipelines.yml

@@ -164,7 +164,19 @@ jobs:
   - script: |
       brew update
       make CC=gcc-12 FC=gfortran-12
-     
+
+- job: OSX_LLVM_flangnew
+  pool:
+     vmImage: 'macOS-latest'
+  variables:
+     LD_LIBRARY_PATH: /usr/local/opt/llvm/lib
+     LIBRARY_PATH: /usr/local/opt/llvm/lib
+  steps:   
+  - script: |
+      brew update
+      brew install llvm flang
+      make TARGET=NEHALEM CC=/usr/local/opt/llvm/bin/clang FC=/usr/local/Cellar/flang/19.1.7_1/bin/flang-new NO_SHARED=1
+
 - job: OSX_OpenMP_Clang
   pool:
      vmImage: 'macOS-latest'

f_check

@@ -245,6 +245,13 @@ else
                 ;;
             *flang*)
                 vendor=FLANG
+        	data=`$compiler -v 2>&1 > /dev/null`
+        	v="${data#*version *}"
+                v="${v%%*.}"
+                major="${v%%.*}"
+                if [ "$major" -ge 17 ]; then
+                        vendor=FLANGNEW
+                fi
                 bu=_
                 openmp='-fopenmp'
                 ;;