azure: Install the DMD D compiler

Be more prescriptive about the static linker to use in test case
common/143. This avoids using DMD's 'lib' in preference to clang-cl's
'llvm-lib' when both of them are in PATH

ci/azure-steps.yml

@@ -58,6 +58,20 @@ steps:
        $env:Path = "C:\java\jdk\jdk1.8.0_102\bin\;$env:Path"
      }
 
+     # install D compiler and dub packages
+     if ($env:backend -eq 'ninja') {
+          & .\ci\install-dmd.ps1
+          $arch = 'x86_mscoff'
+          if ($Env:arch -eq 'x64') {
+            $arch = 'x86_64'
+          }
+          & dub fetch urld
+          & dub build urld --compiler=dmd --arch=$arch
+          & dub fetch dubtestproject
+          & dub build dubtestproject:test1 --compiler=dmd --arch=$arch
+          & dub build dubtestproject:test2 --compiler=dmd --arch=$arch
+        }
+
      # test_find_program exercises some behaviour which relies on .py being in PATHEXT
      $env:PATHEXT += ';.py'
 

test cases/common/143 C and CPP link/meson.build

@@ -26,7 +26,13 @@ libc = static_library('cfoo', ['foo.c', 'foo.h'])
 cxx = meson.get_compiler('cpp')
 
 if cxx.get_argument_syntax() == 'msvc'
-  static_linker = find_program('lib', 'llvm-lib')
+  if cxx.get_id() == 'msvc'
+    static_linker = find_program('lib')
+  elif cxx.get_id() == 'clang-cl'
+    static_linker = find_program('llvm-lib')
+  else
+     error('unable to determine static linker to use with this compiler')
+  endif
   compile_cmd = ['/c', '@INPUT@', '/Fo@OUTPUT@']
   stlib_cmd = [static_linker, '/OUT:@OUTPUT@', '@INPUT@']
 else