debloat the cmakelists.txt and add a bunch of customization for building

CMakeLists.txt

@@ -24,6 +24,9 @@ project(sentencepiece VERSION ${SPM_VERSION} LANGUAGES C CXX)
 
 option(SPM_ENABLE_NFKC_COMPILE "Enables NFKC compile" OFF)
 option(SPM_ENABLE_SHARED "Builds shared libaries in addition to static libraries." ON)
+option(SPM_ENABLE_STATIC "Builds static libaries." ON)
+option(SPM_BUILD_EXECUTABLES "Builds executables such as spm_encode and spm_decode." OFF)
+option(SPM_BUILD_TRAINING "Builds training libraries." ON)
 option(SPM_BUILD_TEST "Builds test binaries." OFF)
 option(SPM_COVERAGE "Runs gcov to test coverage." OFF)
 option(SPM_ENABLE_TENSORFLOW_SHARED "Makes a tensorflow compatible shared file." OFF)
@@ -38,6 +41,10 @@ set_property(CACHE SPM_PROTOBUF_PROVIDER PROPERTY STRINGS "internal" "package")
 set(SPM_ABSL_PROVIDER "internal" CACHE STRING "Provider of absl library")
 set_property(CACHE SPM_ABSL_PROVIDER PROPERTY STRINGS "internal" "module" "package")
 
+if (SPM_BUILD_TEST)
+  set(SPM_BUILD_TRAINING ON)
+endif()
+
 if (SPM_CROSS_SYSTEM_PROCESSOR)
  set(CMAKE_SYSTEM_PROCESSOR ${SPM_CROSS_SYSTEM_PROCESSOR})
 endif()

src/CMakeLists.txt

@@ -223,41 +223,54 @@ endif()
 
 if (SPM_ENABLE_SHARED)
   add_library(sentencepiece SHARED ${SPM_SRCS})
-  add_library(sentencepiece_train SHARED ${SPM_TRAIN_SRCS})
+  set(SPM_INSTALLTARGETS sentencepiece)
+  if (SPM_BUILD_TRAINING)
+    add_library(sentencepiece_train SHARED ${SPM_TRAIN_SRCS})
+    target_link_libraries(sentencepiece_train ${SPM_LIBS} sentencepiece)
+    set_target_properties(sentencepiece sentencepiece_train PROPERTIES SOVERSION 0 VERSION 0.0.0)
+    set_target_properties(sentencepiece_train PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS YES)
+    list(APPEND SPM_INSTALLTARGETS sentencepiece_train)
+  endif()
   if (ANDROID)
     target_link_libraries(sentencepiece log)
-    target_link_libraries(sentencepiece_train log)
+    if (SPM_BUILD_TRAINING)
+      target_link_libraries(sentencepiece_train log)
+    endif()
   endif()
-endif()
-
-add_library(sentencepiece-static STATIC ${SPM_SRCS})
-add_library(sentencepiece_train-static STATIC ${SPM_TRAIN_SRCS})
 
-target_link_libraries(sentencepiece-static INTERFACE ${SPM_LIBS})
-target_link_libraries(sentencepiece_train-static INTERFACE sentencepiece-static ${SPM_LIBS})
-
-if (SPM_ENABLE_SHARED)
   target_link_libraries(sentencepiece ${SPM_LIBS})
-  target_link_libraries(sentencepiece_train ${SPM_LIBS} sentencepiece)
-  set(SPM_INSTALLTARGETS sentencepiece sentencepiece_train sentencepiece-static sentencepiece_train-static)
-  set_target_properties(sentencepiece sentencepiece_train PROPERTIES SOVERSION 0 VERSION 0.0.0)
   set_target_properties(sentencepiece PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS YES)
-  set_target_properties(sentencepiece_train PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS YES)
+
   if (MSVC)
     set_target_properties(sentencepiece PROPERTIES IMPORT_SUFFIX "_import.lib")
-    set_target_properties(sentencepiece_train PROPERTIES IMPORT_SUFFIX "_import.lib")
+    if (SPM_BUILD_TRAINING)
+      set_target_properties(sentencepiece_train PROPERTIES IMPORT_SUFFIX "_import.lib")
+    endif()
   elseif (MINGW)
     set_target_properties(sentencepiece PROPERTIES IMPORT_SUFFIX ".dll.a")
-    set_target_properties(sentencepiece_train PROPERTIES IMPORT_SUFFIX ".dll.a")
+    if (SPM_BUILD_TRAINING)
+      set_target_properties(sentencepiece_train PROPERTIES IMPORT_SUFFIX ".dll.a")
+    endif()
   endif()
 else()
+  add_library(sentencepiece-static STATIC ${SPM_SRCS})
+  target_link_libraries(sentencepiece-static INTERFACE ${SPM_LIBS})
+
   add_library(sentencepiece ALIAS sentencepiece-static)
-  add_library(sentencepiece_train ALIAS sentencepiece_train-static)
-  set(SPM_INSTALLTARGETS sentencepiece-static sentencepiece_train-static)
-endif()
+  set_target_properties(sentencepiece-static PROPERTIES OUTPUT_NAME "sentencepiece")
 
-set_target_properties(sentencepiece-static PROPERTIES OUTPUT_NAME "sentencepiece")
-set_target_properties(sentencepiece_train-static PROPERTIES OUTPUT_NAME "sentencepiece_train")
+  if (SPM_BUILD_TRAINING)
+    add_library(sentencepiece_train-static STATIC ${SPM_TRAIN_SRCS})
+    target_link_libraries(sentencepiece_train-static INTERFACE sentencepiece-static ${SPM_LIBS})
+
+    set(SPM_INSTALLTARGETS sentencepiece-static sentencepiece_train-static)
+
+    add_library(sentencepiece_train ALIAS sentencepiece_train-static)
+    set_target_properties(sentencepiece_train-static PROPERTIES OUTPUT_NAME "sentencepiece_train")
+  else()
+    set(SPM_INSTALLTARGETS sentencepiece-static)
+  endif()
+endif()
 
 if (NOT MSVC)
   if (SPM_COVERAGE)
@@ -279,30 +292,43 @@ if (NOT MSVC)
     PROPERTIES COMPILE_FLAGS "-Wno-sign-compare")
   if (SPM_ENABLE_SHARED)
     set_property(TARGET sentencepiece APPEND_STRING PROPERTY COMPILE_FLAGS " -DPIC")
-    set_property(TARGET sentencepiece_train APPEND_STRING PROPERTY COMPILE_FLAGS " -DPIC")
+    if (SPM_BUILD_TRAINING)
+      set_property(TARGET sentencepiece_train APPEND_STRING PROPERTY COMPILE_FLAGS " -DPIC")
+    endif()
   endif()
 endif()
 
-add_executable(spm_encode spm_encode_main.cc)
-add_executable(spm_decode spm_decode_main.cc)
-add_executable(spm_normalize spm_normalize_main.cc)
-add_executable(spm_train spm_train_main.cc)
-add_executable(spm_export_vocab spm_export_vocab_main.cc)
+if (SPM_BUILD_EXECUTABLES)
+  add_executable(spm_encode spm_encode_main.cc)
+  add_executable(spm_decode spm_decode_main.cc)
+  if (SPM_BUILD_TRAINING)
+    add_executable(spm_normalize spm_normalize_main.cc)
+    add_executable(spm_train spm_train_main.cc)
+  endif()
+  add_executable(spm_export_vocab spm_export_vocab_main.cc)
 
-target_link_libraries(spm_encode sentencepiece)
-target_link_libraries(spm_decode sentencepiece)
-target_link_libraries(spm_normalize sentencepiece sentencepiece_train)
-target_link_libraries(spm_train sentencepiece sentencepiece_train)
-target_link_libraries(spm_export_vocab sentencepiece)
+  target_link_libraries(spm_encode sentencepiece)
+  target_link_libraries(spm_decode sentencepiece)
+  if (SPM_BUILD_TRAINING)
+    target_link_libraries(spm_normalize sentencepiece sentencepiece_train)
+    target_link_libraries(spm_train sentencepiece sentencepiece_train)
+  endif()
+  target_link_libraries(spm_export_vocab sentencepiece)
+  if (SPM_BUILD_EXECUTABLES)
+    list(APPEND SPM_INSTALLTARGETS
+      spm_encode spm_decode spm_export_vocab)
+    if (SPM_BUILD_TRAINING)
+      list(APPEND SPM_INSTALLTARGETS
+        spm_normalize spm_train)
+    endif()
+  endif()
+endif()
 
 if (SPM_ENABLE_NFKC_COMPILE)
   add_executable(compile_charsmap compile_charsmap_main.cc)
   target_link_libraries(compile_charsmap sentencepiece sentencepiece_train)
 endif()
 
-list(APPEND SPM_INSTALLTARGETS
-  spm_encode spm_decode spm_normalize spm_train spm_export_vocab)
-
 if (CMAKE_SYSTEM_NAME STREQUAL "iOS")
   install(TARGETS ${SPM_INSTALLTARGETS}
     BUNDLE DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -316,8 +342,10 @@ install(TARGETS ${SPM_INSTALLTARGETS}
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endif()
 
-install(FILES sentencepiece_trainer.h sentencepiece_processor.h
-  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+if (SPM_BUILD_TRAINING)
+  install(FILES sentencepiece_trainer.h sentencepiece_processor.h
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+endif()
 if (NOT SPM_PROTOBUF_PROVIDER STREQUAL "internal")
   install(FILES ${SPM_PROTO_HDRS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 endif()