Azure CI Mac: Try to overcome #3901 for macOS-11 image

Author: kinke

azure-pipelines.yml

@@ -103,10 +103,12 @@ jobs:
   variables:
     CI_OS: osx
     ARCH: x86_64
-    BOOTSTRAP_CMAKE_FLAGS: -DBUILD_LTO_LIBS=ON
+    BOOTSTRAP_CMAKE_FLAGS: >
+      -DBUILD_LTO_LIBS=ON
+      -DD_COMPILER_FLAGS=-gcc=/usr/bin/c++
     EXTRA_CMAKE_FLAGS: >
       -DBUILD_LTO_LIBS=ON
-      -DD_COMPILER_FLAGS="-O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto"
+      -DD_COMPILER_FLAGS="-gcc=/usr/bin/c++ -O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto"
       -DEXTRA_CXXFLAGS=-flto=full
     MACOSX_DEPLOYMENT_TARGET: 10.12
     IOS_DEPLOYMENT_TARGET: 12.0
@@ -132,10 +134,11 @@ jobs:
 - job: macOS_arm64
   timeoutInMinutes: 120
   pool:
-    vmImage: 'macOS-10.15'
+    vmImage: 'macOS-11'
   variables:
     CI_OS: osx
     ARCH: arm64
+    BOOTSTRAP_CMAKE_FLAGS: -DD_COMPILER_FLAGS=-gcc=/usr/bin/c++
     EXTRA_CMAKE_FLAGS: >
       -DBUILD_LTO_LIBS=ON
       -DD_COMPILER_FLAGS="-O -flto=full -defaultlib=phobos2-ldc-lto,druntime-ldc-lto"

cmake/Modules/BuildDExecutable.cmake

@@ -94,7 +94,7 @@ function(build_d_executable target_name output_exe d_src_files compiler_args lin
         translate_linker_args(full_linker_args translated_linker_args)
 
         # We need to link against the C++ runtime library.
-        if(NOT MSVC AND "${D_COMPILER_ID}" STREQUAL "LDMD")
+        if(NOT MSVC AND "${D_COMPILER_ID}" STREQUAL "LDMD" AND NOT "${dflags}" MATCHES "(^|;)-gcc=")
             set(translated_linker_args "-gcc=${CMAKE_CXX_COMPILER}" ${translated_linker_args})
         endif()