Continue CMake support improvement

- Update documentation
- Remove type target
- Remove typos
- simplify target
- improve 1-1 matchign with Bazel targets

CMake/AbseilHelpers.cmake

@@ -19,7 +19,7 @@ include(CMakeParseArguments)
 set(_ABSL_HELPERS_PATH "${CMAKE_CURRENT_LIST_DIR}")
 
 #
-# create a static library absl_based on the following variable
+# create a library in the absl namespace
 #
 # parameters
 # SOURCES : sources files for the library

CMake/README.md

@@ -4,37 +4,66 @@
 
 ### Recommended usage : incorporate Abseil into an  CMake project
 
-    We recommended to build and use abseil in the same way than googletest
-    ( https://github.com/google/googletest/blob/master/googletest/README.md )
+  For API / ABI compatibility reasons, it is recommended to build
+  and use abseil in a subdirectory of your project or as an embedded
+  dependency
 
-    * Download abseil and copy it in a sub-directory in your project.
+  This is similar to the recommended usage of the googletest framework
+  ( https://github.com/google/googletest/blob/master/googletest/README.md )
 
-    * Or add abseil as a git-submodule in your project
+  Build and use step-by-step
 
-    You can then use the cmake `add_subdirectory()` command to include
-    abseil directly and use the abseil targets in your project.
 
-    Abseil requires CCTZ and the googletest framework. Consequently, 
+  1- Download abseil and copy it in a sub-directory in your project.
+      or add abseil as a git-submodule in your project
+
+  2- If not done yet, download and copy in your project the two dependencies of
+      abseil `cctz` and `googletest`
+
+    * cctz  https://github.com/google/cctz
+    * googletest https://github.com/google/googletest
+
+  3- You can then use the cmake command `add_subdirectory()` to include
+  abseil directly and use the abseil targets in your project.
+
+    Note: Abseil requires CCTZ and the googletest framework. Consequently,
     the targets  `gtest`, `gtest_main`, `gmock` and `cctz` need
-    to be declared in your project before including abseil with `add_subdirectory`. 
-    You can find instructions on how to get and build these projects at these 
+    to be declared in your project before including abseil with `add_subdirectory`.
+    You can find instructions on how to get and build these projects at these
     URL :
-        * cctz  https://github.com/google/cctz
-        * googletest https://github.com/google/googletest
-
-
-
-    Here is a short CMakeLists.txt example of a possible project file 
-    using abseil
-
-    project(my_project)
-
-    add_subdirectory(googletest)
-    add_subdirectory(cctz)    
-    add_subdirectory(abseil-cpp)
-
-    add_executable(my_exe source.cpp)
-    target_link_libraries(my_exe base synchronization strings)
+
+
+  4- Add the absl:: target you wish to use to the `target_link_libraries()`
+    section of your executable or of your library
+
+
+      Here is a short CMakeLists.txt example of a possible project file
+      using abseil
+
+      project(my_project)
+
+      add_subdirectory(googletest)
+      add_subdirectory(cctz)
+      add_subdirectory(abseil-cpp)
+
+      add_executable(my_exe source.cpp)
+      target_link_libraries(my_exe absl::base absl::synchronization absl::strings)
+
+
+    You will find here a non exhaustive list of absl public targets
+
+      absl::base
+      absl::algorithm
+      absl::container
+      absl::debugging
+      absl::memory
+      absl::meta
+      absl::numeric
+      absl::strings
+      absl::synchronization
+      absl::time
+      absl::utility
+
 
 
 

absl/base/CMakeLists.txt

@@ -65,10 +65,8 @@ list(APPEND BASE_SRC
   "internal/sysinfo.cc"
   "internal/thread_identity.cc"
   "internal/unscaledcycleclock.cc"
-  "internal/spinlock_wait.cc"
   "internal/low_level_alloc.cc"
   "internal/malloc_hook.cc"
-  "dynamic_annotations.cc"
   ${BASE_PUBLIC_HEADERS}
   ${BASE_INTERNAL_HEADERS}
 )
@@ -78,6 +76,9 @@ absl_library(
     absl_base
   SOURCES
     ${BASE_SRC}
+  PUBLIC_LIBRARIES
+    absl_dynamic_annotations
+    absl_spinlock_wait
   EXPORT_NAME
     base
 )
@@ -110,6 +111,46 @@ absl_library(
 )
 
 
+# dynamic_annotations library
+set(DYNAMIC_ANNOTATIONS_SRC "dynamic_annotations.cc")
+
+absl_library(
+  TARGET
+    absl_dynamic_annotations
+  SOURCES
+    ${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"
+  "internal/malloc_hook.cc"
+  "internal/malloc_hook_mmap_linux.inc"
+)
+
+absl_library(
+  TARGET
+    absl_malloc_internal
+  SOURCES
+    ${MALLOC_INTERNAL_SRC}
+  PUBLIC_LIBRARIES
+    absl_dynamic_annotations
+)
+
+
+
 #
 ## TESTS
 #

absl/strings/CMakeLists.txt

@@ -16,7 +16,6 @@
 
 
 list(APPEND STRINGS_PUBLIC_HEADERS
-  "ascii_ctype.h"
   "ascii.h"
   "escaping.h"
   "match.h"

absl/types/CMakeLists.txt

@@ -68,15 +68,6 @@ absl_library(
 
 
 
-absl_header_library(
-  TARGET
-    absl_types
-  PUBLIC_LIBRARIES
-    absl_optional absl_bad_any_cast absl_bad_optional_access
-  EXPORT_NAME
-    types
-)
-
 #
 ## TESTS
 #