Merge pull request #136 from rongjiecomputer/cc_library

[CMake] Implement absl_cc_library as Bazel's cc_library 

7 files changed, 159 insertions, 70 deletions

diff --git a/CMake/AbseilHelpers.cmake b/CMake/AbseilHelpers.cmake
index 0c934174..96813b08 100644
--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -62,7 +62,110 @@ function(absl_library)
   endif()
 endfunction()
 
+#
+# CMake function to imitate Bazel's cc_library rule.
+#
+# Parameters:
+# NAME: name of target (see Note)
+# HDRS: List of public header files for the library
+# SRCS: List of source files for the library
+# DEPS: List of other libraries to be linked in to the binary targets
+# COPTS: List of private compile options
+# DEFINES: List of public defines
+# LINKOPTS: List of link options
+# PUBLIC: Add this so that this library will be exported under absl:: (see Note).
+# TESTONLY: When added, this target will only be built if user passes -DABSL_RUN_TESTS=ON to CMake.
+#
+# Note:
+#
+# By default, absl_cc_library will always create a library named absl_internal_${NAME},
+# which means other targets can only depend this library as absl_internal_${NAME}, not ${NAME}.
+# This is to reduce namespace pollution.
+#
+# absl_cc_library(
+#   NAME
+#     awesome_lib
+#   HDRS
+#     "a.h"
+#   SRCS
+#     "a.cc"
+# )
+# absl_cc_library(
+#   NAME
+#     fantastic_lib
+#   SRCS
+#     "b.cc"
+#   DEPS
+#     absl_internal_awesome_lib # not "awesome_lib"!
+# )
+#
+# If PUBLIC is set, absl_cc_library will instead create a target named
+# absl_${NAME} and an alias absl::${NAME}.
+#
+# absl_cc_library(
+#   NAME
+#     main_lib
+#   ...
+#   PUBLIC
+# )
+#
+# User can then use the library as absl::main_lib (although absl_main_lib is defined too).
+#
+# TODO: Implement "ALWAYSLINK"
 
+function(absl_cc_library)
+  cmake_parse_arguments(ABSL_CC_LIB
+    "DISABLE_INSTALL;PUBLIC;TESTONLY"
+    "NAME"
+    "HDRS;SRCS;COPTS;DEFINES;LINKOPTS;DEPS"
+    ${ARGN}
+  )
+
+  if (NOT ABSL_CC_LIB_TESTONLY OR ABSL_RUN_TESTS)
+    if (ABSL_CC_LIB_PUBLIC)
+      set(_NAME "absl_${ABSL_CC_LIB_NAME}")
+    else()
+      set(_NAME "absl_internal_${ABSL_CC_LIB_NAME}")
+    endif()
+
+    # Check if this is a header-only library
+    if ("${ABSL_CC_LIB_SRCS}" STREQUAL "")
+      set(ABSL_CC_LIB_IS_INTERFACE 1)
+    else()
+      set(ABSL_CC_LIB_IS_INTERFACE 0)
+    endif()
+
+    if(NOT ABSL_CC_LIB_IS_INTERFACE)
+      add_library(${_NAME} STATIC "")
+      target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS})
+      target_include_directories(${_NAME}
+        PUBLIC ${ABSL_COMMON_INCLUDE_DIRS})
+      # TODO(rongjiecomputer): Revisit ABSL_COMPILE_CXXFLAGS when fixing GH#123
+      target_compile_options(${_NAME}
+        PRIVATE ${ABSL_COMPILE_CXXFLAGS} ${ABSL_CC_LIB_COPTS})
+      target_link_libraries(${_NAME}
+        PUBLIC ${ABSL_CC_LIB_DEPS}
+        PRIVATE ${ABSL_CC_LIB_LINKOPTS}
+      )
+      target_compile_definitions(${_NAME} PUBLIC ${ABSL_CC_LIB_DEFINES})
+
+      # Add all Abseil targets to a a folder in the IDE for organization.
+      set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER})
+    else()
+      # Generating header-only library
+      add_library(${_NAME} INTERFACE)
+      target_include_directories(${_NAME} INTERFACE ${ABSL_COMMON_INCLUDE_DIRS})
+      target_link_libraries(${_NAME}
+        INTERFACE ${ABSL_CC_LIB_DEPS} ${ABSL_CC_LIB_LINKOPTS}
+      )
+      target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES})
+    endif()
+
+    if(ABSL_CC_LIB_PUBLIC)
+      add_library(absl::${ABSL_CC_LIB_NAME} ALIAS ${_NAME})
+    endif()
+  endif()
+endfunction()
 
 #
 # header only virtual target creation
diff --git a/absl/base/CMakeLists.txt b/absl/base/CMakeLists.txt
index 04a6eb31..202003e6 100644
--- a/absl/base/CMakeLists.txt
+++ b/absl/base/CMakeLists.txt
@@ -78,54 +78,44 @@ absl_library(
     ${BASE_SRC}
   PUBLIC_LIBRARIES
     absl_dynamic_annotations
-    absl_spinlock_wait
+    absl_internal_spinlock_wait
   EXPORT_NAME
     base
 )
 
-# throw delegate library
-set(THROW_DELEGATE_SRC "internal/throw_delegate.cc")
-
-absl_library(
-  TARGET
-    absl_throw_delegate
-  SOURCES
-    ${THROW_DELEGATE_SRC}
-  PUBLIC_LIBRARIES
-    ${THROW_DELEGATE_PUBLIC_LIBRARIES}
-  PRIVATE_COMPILE_FLAGS
-    ${ABSL_EXCEPTIONS_FLAG}
-  EXPORT_NAME
+absl_cc_library(
+  NAME
     throw_delegate
+  SRCS
+    "internal/throw_delegate.cc"
+  HDRS
+    "internal/throw_delegate.h"
+  COPTS
+    ${ABSL_EXCEPTIONS_FLAG}
+  DEPS
+    absl::base
 )
 
-if(BUILD_TESTING)
-  # exception-safety testing library
-  set(EXCEPTION_SAFETY_TESTING_SRC
+
+# exception-safety testing library
+absl_cc_library(
+  NAME
+    exception_safety_testing
+  HDRS
     "internal/exception_safety_testing.h"
+  SRCS
     "internal/exception_safety_testing.cc"
-  )
-  set(EXCEPTION_SAFETY_TESTING_PUBLIC_LIBRARIES
-    ${ABSL_TEST_COMMON_LIBRARIES}
+  COPTS
+    ${ABSL_EXCEPTIONS_FLAG}
+  DEPS
     absl::base
     absl::memory
     absl::meta
     absl::strings
     absl::optional
     gtest
-  )
-
-absl_library(
-  TARGET
-    absl_base_internal_exception_safety_testing
-  SOURCES
-    ${EXCEPTION_SAFETY_TESTING_SRC}
-  PUBLIC_LIBRARIES
-    ${EXCEPTION_SAFETY_TESTING_PUBLIC_LIBRARIES}
-  PRIVATE_COMPILE_FLAGS
-    ${ABSL_EXCEPTIONS_FLAG}
+  TESTONLY
 )
-endif()
 
 
 # dynamic_annotations library
@@ -138,29 +128,25 @@ absl_library(
     ${DYNAMIC_ANNOTATIONS_SRC}
 )
 
-
-# spinlock_wait library
-set(SPINLOCK_WAIT_SRC "internal/spinlock_wait.cc")
-
-absl_library(
-  TARGET
-    absl_spinlock_wait
-  SOURCES
-    ${SPINLOCK_WAIT_SRC}
-)
-
-
-# malloc_internal library
-list(APPEND MALLOC_INTERNAL_SRC
-  "internal/low_level_alloc.cc"
+absl_cc_library(
+  NAME
+    spinlock_wait
+  SRCS
+    "internal/spinlock_wait.cc"
+  HDRS
+    "internal/scheduling_mode.h"
+    "internal/spinlock_wait.h"
 )
 
-absl_library(
-  TARGET
-    absl_malloc_internal
-  SOURCES
-    ${MALLOC_INTERNAL_SRC}
-  PUBLIC_LIBRARIES
+absl_cc_library(
+  NAME
+    malloc_internal
+  SRCS
+    "internal/low_level_alloc.cc"
+  HDRS
+    "internal/direct_mmap.h"
+    "internal/low_level_alloc.h"
+  DEPS
     absl_dynamic_annotations
 )
 
@@ -211,7 +197,7 @@ absl_test(
 
 # test absl_throw_delegate_test
 set(THROW_DELEGATE_TEST_SRC "throw_delegate_test.cc")
-set(THROW_DELEGATE_TEST_PUBLIC_LIBRARIES absl::base absl_throw_delegate)
+set(THROW_DELEGATE_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate)
 
 absl_test(
   TARGET
@@ -368,7 +354,7 @@ absl_test(
 set(EXCEPTION_SAFETY_TESTING_TEST_SRC "exception_safety_testing_test.cc")
 set(EXCEPTION_SAFETY_TESTING_TEST_PUBLIC_LIBRARIES
   absl::base
-  absl_base_internal_exception_safety_testing
+  absl_internal_exception_safety_testing
   absl::memory
   absl::meta
   absl::strings
diff --git a/absl/container/CMakeLists.txt b/absl/container/CMakeLists.txt
index 9e406902..5de75f59 100644
--- a/absl/container/CMakeLists.txt
+++ b/absl/container/CMakeLists.txt
@@ -82,7 +82,7 @@ absl_library(
 
 # test fixed_array_test
 set(FIXED_ARRAY_TEST_SRC "fixed_array_test.cc")
-set(FIXED_ARRAY_TEST_PUBLIC_LIBRARIES absl::base absl_throw_delegate test_instance_tracker_lib)
+set(FIXED_ARRAY_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate test_instance_tracker_lib)
 
 absl_test(
   TARGET
@@ -111,7 +111,7 @@ absl_test(
 set(FIXED_ARRAY_EXCEPTION_SAFETY_TEST_SRC "fixed_array_exception_safety_test.cc")
 set(FIXED_ARRAY_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES
   absl::container
-  absl_base_internal_exception_safety_testing
+  absl_internal_exception_safety_testing
 )
 
 absl_test(
@@ -128,7 +128,7 @@ absl_test(
 
 # test inlined_vector_test
 set(INLINED_VECTOR_TEST_SRC "inlined_vector_test.cc")
-set(INLINED_VECTOR_TEST_PUBLIC_LIBRARIES absl::base absl_throw_delegate test_instance_tracker_lib)
+set(INLINED_VECTOR_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate test_instance_tracker_lib)
 
 absl_test(
   TARGET
@@ -153,7 +153,7 @@ absl_test(
 
 # test test_instance_tracker_test
 set(TEST_INSTANCE_TRACKER_TEST_SRC "internal/test_instance_tracker_test.cc")
-set(TEST_INSTANCE_TRACKER_TEST_PUBLIC_LIBRARIES absl::base absl_throw_delegate test_instance_tracker_lib)
+set(TEST_INSTANCE_TRACKER_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate test_instance_tracker_lib)
 
 
 absl_test(
diff --git a/absl/debugging/CMakeLists.txt b/absl/debugging/CMakeLists.txt
index 4af2ec8a..266c2ca0 100644
--- a/absl/debugging/CMakeLists.txt
+++ b/absl/debugging/CMakeLists.txt
@@ -85,7 +85,7 @@ absl_library(
     ${SYMBOLIZE_SRC}
   PUBLIC_LIBRARIES
     absl::base
-    absl_malloc_internal
+    absl_internal_malloc_internal
   EXPORT_NAME
     symbolize
 )
diff --git a/absl/memory/CMakeLists.txt b/absl/memory/CMakeLists.txt
index 5958f5c5..7d731e8a 100644
--- a/absl/memory/CMakeLists.txt
+++ b/absl/memory/CMakeLists.txt
@@ -53,7 +53,7 @@ absl_test(
 set(MEMORY_EXCEPTION_SAFETY_TEST_SRC "memory_exception_safety_test.cc")
 set(MEMORY_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES
   absl::memory
-  absl_base_internal_exception_safety_testing
+  absl_internal_exception_safety_testing
 )
 
 absl_test(
diff --git a/absl/strings/CMakeLists.txt b/absl/strings/CMakeLists.txt
index f3e41623..4df3bac3 100644
--- a/absl/strings/CMakeLists.txt
+++ b/absl/strings/CMakeLists.txt
@@ -67,7 +67,7 @@ list(APPEND STRINGS_SRC
   ${STRINGS_PUBLIC_HEADERS}
   ${STRINGS_INTERNAL_HEADERS}
 )
-set(STRINGS_PUBLIC_LIBRARIES absl::base absl_throw_delegate)
+set(STRINGS_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate)
 
 absl_library(
   TARGET
@@ -207,7 +207,7 @@ absl_test(
 
 # test string_view_test
 set(STRING_VIEW_TEST_SRC "string_view_test.cc")
-set(STRING_VIEW_TEST_PUBLIC_LIBRARIES absl::strings absl_throw_delegate absl::base)
+set(STRING_VIEW_TEST_PUBLIC_LIBRARIES absl::strings absl_internal_throw_delegate absl::base)
 
 absl_test(
   TARGET
@@ -235,7 +235,7 @@ absl_test(
 
 # test str_replace_test
 set(STR_REPLACE_TEST_SRC "str_replace_test.cc")
-set(STR_REPLACE_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_throw_delegate)
+set(STR_REPLACE_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_internal_throw_delegate)
 
 absl_test(
   TARGET
@@ -249,7 +249,7 @@ absl_test(
 
 # test str_split_test
 set(STR_SPLIT_TEST_SRC "str_split_test.cc")
-set(STR_SPLIT_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_throw_delegate)
+set(STR_SPLIT_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_internal_throw_delegate)
 
 absl_test(
   TARGET
diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt
index 2f2e3a77..bc6c39e9 100644
--- a/absl/types/CMakeLists.txt
+++ b/absl/types/CMakeLists.txt
@@ -123,7 +123,7 @@ absl_library(
 
 # test any_test
 set(ANY_TEST_SRC "any_test.cc")
-set(ANY_TEST_PUBLIC_LIBRARIES absl::base absl::throw_delegate absl::any absl::bad_any_cast test_instance_tracker_lib)
+set(ANY_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate absl::any absl::bad_any_cast test_instance_tracker_lib)
 
 absl_test(
   TARGET
@@ -152,7 +152,7 @@ set(ANY_EXCEPTION_SAFETY_TEST_SRC "any_exception_safety_test.cc")
 set(ANY_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES
   absl::any
   absl::base
-  absl_base_internal_exception_safety_testing
+  absl_internal_exception_safety_testing
 )
 
 absl_test(
@@ -169,7 +169,7 @@ absl_test(
 
 # test span_test
 set(SPAN_TEST_SRC "span_test.cc")
-set(SPAN_TEST_PUBLIC_LIBRARIES absl::base absl::strings absl::throw_delegate absl::span test_instance_tracker_lib)
+set(SPAN_TEST_PUBLIC_LIBRARIES absl::base absl::strings absl_internal_throw_delegate absl::span test_instance_tracker_lib)
 
 absl_test(
   TARGET
@@ -197,7 +197,7 @@ absl_test(
 
 # test optional_test
 set(OPTIONAL_TEST_SRC "optional_test.cc")
-set(OPTIONAL_TEST_PUBLIC_LIBRARIES absl::base absl::throw_delegate absl::optional absl_bad_optional_access)
+set(OPTIONAL_TEST_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate absl::optional absl_bad_optional_access)
 
 absl_test(
   TARGET
@@ -213,7 +213,7 @@ absl_test(
 set(OPTIONAL_EXCEPTION_SAFETY_TEST_SRC "optional_exception_safety_test.cc")
 set(OPTIONAL_EXCEPTION_SAFETY_TEST_PUBLIC_LIBRARIES
   absl::optional
-  absl_base_internal_exception_safety_testing
+  absl_internal_exception_safety_testing
 )
 
 absl_test(