install: Add EXCLUDE_FROM_ALL option (#14921)

Let us take an example of a project that has some tests in a component
that need to be installed into a dedicated test package.  The user
expectation is that the result could be achieved by typing the
following:

    make
    make tests
    make install
    DESTDIR=/testpkgs make install-tests

However this results in test components in the default installation as
well as the testpkg.

Add an EXCLUDE_FROM_ALL option to the install() command to tell it that
the installation rule should not be included unless its component is
explicitly specified for installation.

1 files changed, 3 insertions, 1 deletions

diff --git a/Source/cmInstallFilesCommand.cxx b/Source/cmInstallFilesCommand.cxx
index 68557bd..d3d258e 100644
--- a/Source/cmInstallFilesCommand.cxx
+++ b/Source/cmInstallFilesCommand.cxx
@@ -122,6 +122,7 @@ void cmInstallFilesCommand::CreateInstallGenerator() const
   // Use a file install generator.
   const char* no_permissions = "";
   const char* no_rename = "";
+  bool no_exclude_from_all = false;
   std::string no_component = this->Makefile->GetSafeDefinition(
                                        "CMAKE_INSTALL_DEFAULT_COMPONENT_NAME");
   std::vector<std::string> no_configurations;
@@ -131,7 +132,8 @@ void cmInstallFilesCommand::CreateInstallGenerator() const
     new cmInstallFilesGenerator(this->Files,
                                 destination.c_str(), false,
                                 no_permissions, no_configurations,
-                                no_component.c_str(), message, no_rename));
+                                no_component.c_str(), message,
+                                no_exclude_from_all, no_rename));
 }