Merge topic 'bootstrap-system-cppdap' into release-3.27

e4a9227360 bootstrap: Add --(no-)system-cppdap configuration switch

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !8550
diff --git a/Source/cmLocalUnixMakefileGenerator3.cxx b/Source/cmLocalUnixMakefileGenerator3.cxx
index 43711b3..3c6b303 100644
--- a/Source/cmLocalUnixMakefileGenerator3.cxx
+++ b/Source/cmLocalUnixMakefileGenerator3.cxx
@@ -1222,7 +1222,7 @@
         } else {
           // Use cmake to echo the text in color.
           cmd = cmStrCat(
-            "@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) ",
+            "@$(CMAKE_COMMAND) -E cmake_echo_color \"--switch=$(COLOR)\" ",
             color_name);
           if (progress) {
             cmd += "--progress-dir=";
diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index 8099d44..5f27856 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -1525,7 +1525,7 @@
               cmSystemTools::CollapseFullPath(this->InfoFileNameFull),
               cmOutputConverter::SHELL);
   if (this->LocalGenerator->GetColorMakefile()) {
-    depCmd << " --color=$(COLOR)";
+    depCmd << " \"--color=$(COLOR)\"";
   }
   commands.push_back(depCmd.str());
 
diff --git a/Tests/RunCMake/Color/DiagColorInEnv.cmake b/Tests/RunCMake/Color/DiagColorInEnv.cmake
new file mode 100644
index 0000000..83c45e5
--- /dev/null
+++ b/Tests/RunCMake/Color/DiagColorInEnv.cmake
@@ -0,0 +1,9 @@
+if (CMAKE_GENERATOR MATCHES "Makefiles")
+  set(CMAKE_COLOR_DIAGNOSTICS 1)
+  set(EXPECT_COLOR 1)
+endif ()
+include(DiagCommon.cmake)
+
+if(CMAKE_GENERATOR MATCHES "Makefiles" AND NOT DEFINED CMAKE_COLOR_MAKEFILE)
+  message(FATAL_ERROR "CMAKE_COLOR_MAKEFILE incorrectly undefined.")
+endif()
diff --git a/Tests/RunCMake/Color/RunCMakeTest.cmake b/Tests/RunCMake/Color/RunCMakeTest.cmake
index bb62d4c..d2bc45a 100644
--- a/Tests/RunCMake/Color/RunCMakeTest.cmake
+++ b/Tests/RunCMake/Color/RunCMakeTest.cmake
@@ -12,3 +12,9 @@
 run_Diag(On -DCMAKE_COLOR_DIAGNOSTICS=ON)
 run_Diag(Off -DCMAKE_COLOR_DIAGNOSTICS=OFF)
 run_Diag(Default)
+
+# Test with `COLOR` in the ambient environment set to an ANSI-like color
+# sequence. `$(COLOR)` is used in the Makefiles generator to control whether or
+# not to do such color sequences itself.
+set(ENV{COLOR} "[38;2;255;221;255m")
+run_Diag(ColorInEnv)