Add support for creating prebuilt Android.mk files

Add options to the `install()` and `export()` commands to export the
targets we build into Android.mk files that reference them as prebuilt
libraries with associated usage requirements (compile definitions,
include directories, link libraries).  This will allow CMake-built
projects to be imported into projects using the Android NDK build
system.

Closes: #15562

1 files changed, 72 insertions, 0 deletions

diff --git a/Source/cmExportInstallAndroidMKGenerator.h b/Source/cmExportInstallAndroidMKGenerator.h
new file mode 100644
index 0000000..4b9f51c
--- /dev/null
+++ b/Source/cmExportInstallAndroidMKGenerator.h
@@ -0,0 +1,72 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#ifndef cmExportInstallAndroidMKGenerator_h
+#define cmExportInstallAndroidMKGenerator_h
+
+#include "cmExportInstallFileGenerator.h"
+
+class cmInstallExportGenerator;
+class cmInstallTargetGenerator;
+
+/** \class cmExportInstallAndroidMKGenerator
+ * \brief Generate a file exporting targets from an install tree.
+ *
+ * cmExportInstallAndroidMKGenerator generates files exporting targets from
+ * install an installation tree.  The files are placed in a temporary
+ * location for installation by cmInstallExportGenerator.  The file format
+ * is for the ndk build system and is a makefile fragment specifing prebuilt
+ * libraries to the ndk build system.
+ *
+ * This is used to implement the INSTALL(EXPORT_ANDROID_MK) command.
+ */
+class cmExportInstallAndroidMKGenerator : public cmExportInstallFileGenerator
+{
+public:
+  /** Construct with the export installer that will install the
+      files.  */
+  cmExportInstallAndroidMKGenerator(cmInstallExportGenerator* iegen);
+
+protected:
+  // Implement virtual methods from the superclass.
+  virtual void GeneratePolicyHeaderCode(std::ostream&) {}
+  virtual void GeneratePolicyFooterCode(std::ostream&) {}
+  virtual void GenerateImportHeaderCode(std::ostream& os,
+                                        const std::string& config = "");
+  virtual void GenerateImportFooterCode(std::ostream& os);
+  virtual void GenerateImportTargetCode(std::ostream& os,
+                                        const cmGeneratorTarget* target);
+  virtual void GenerateExpectedTargetsCode(std::ostream& os,
+                                           const std::string& expectedTargets);
+  virtual void GenerateImportPropertyCode(std::ostream& os,
+                                          const std::string& config,
+                                          cmGeneratorTarget const* target,
+                                          ImportPropertyMap const& properties);
+  virtual void GenerateMissingTargetsCheckCode(
+    std::ostream& os, const std::vector<std::string>& missingTargets);
+  virtual void GenerateInterfaceProperties(
+    cmGeneratorTarget const* target, std::ostream& os,
+    const ImportPropertyMap& properties);
+  virtual void GenerateImportPrefix(std::ostream& os);
+  virtual void LoadConfigFiles(std::ostream&);
+  virtual void GenerateRequiredCMakeVersion(std::ostream& os,
+                                            const char* versionString);
+  virtual void CleanupTemporaryVariables(std::ostream&);
+  virtual void GenerateImportedFileCheckLoop(std::ostream& os);
+  virtual void GenerateImportedFileChecksCode(
+    std::ostream& os, cmGeneratorTarget* target,
+    ImportPropertyMap const& properties,
+    const std::set<std::string>& importedLocations);
+  virtual bool GenerateImportFileConfig(const std::string& config,
+                                        std::vector<std::string>&);
+};
+
+#endif