Update CMake macro descriptions

README.md

@@ -87,14 +87,25 @@ To simplify the integration of GPR-based Ada projects, the `rclada_common` packa
 - `ada_import_interfaces(PKG_NAME[, PKG_NAME...])`
     - Causes the generation of the Ada specification files corresponding to messages and services in PKG_NAME (and all recursive dependencies). These files are made available through a GPR project of name `ros2_PKG_interfaces.gpr` (where PKG is the one invoking `ada_import_interfaces`).
 
-- `ada_import_c_headers(LIBNAME INCLUDE_DIR)` is a helper to make C headers available if they are not part of a library.
-    - LIBNAME is a name that will be used as `clib_LIBNAME.gpr`
-    - INCLUDE_DIR is the path to make available (like in a `-I` flag)
-
-- `ada_import_c_libraries(ARGN)`  is a helper to use C libraries built by other packages.
-    - ARGN is a list of library files (*.so, *.a) that will be made available to the Ada environment as `clib_*` GPR project files. (E.g., for `libgsl.a` you obtain `clib_gsl.gpr`.)
-
-- `ada_generate_binding(TARGET SRCDIR GPRFILE INCLUDE)` generates a supporting low-level Ada binding for the given C header files, with `g++ -fdump-ada-spec`, that is integrated in a high-level Ada project. The project must provide a `gen` folder in which autogenerated sources will be placed before compilation. Check the [rclada's RCL project](https://github.com/ada-ros/rclada/tree/master/gpr_rcl) for an example.
+- `ada_gpr_header(GPRNAME PKGNAME...)` is a helper to make C headers
+  available from other C/C++ packages.
+    - GPRNAME is a name that will be used to create `LIBNAME_header_imports.gpr`
+    - PKGNAME is the package(s) whose include dir will be made available.
+
+- `ada_gpr_link(GPRNAME PKGNAME...)`  is a helper to link C libraries built by
+  other packages.
+    - GPRNAME is a name that will be used to create `LIBNAME_linker_imports.gpr`
+    - PKGNAME is the package(s) whose library dependencies will be brought in
+      for linking. These include any library built by PKGNAME, but also other
+      libraries on which PKGNAME depends.
+
+- `ada_generate_binding(TARGET SRCDIR GPRFILE INCLUDE)` generates a supporting
+  low-level Ada binding for the given C header files, with `g++
+  -fdump-ada-spec`, that is integrated in a high-level Ada project. The project
+  must provide a `gen` folder in which autogenerated sources will be placed
+  before compilation. Check the [rclada's RCL
+  project](https://github.com/ada-ros/rclada/tree/master/gpr_rcl) for an
+  example.
     - TARGET (as above)
     - SRCDIR (as above), contains the high-level Ada project.
     - GPRFILE (as above)
@@ -195,7 +206,7 @@ These might help in understanding some of the interrelations amongst ROS2 packag
 
 ### Acknowledgements
 
-This project is done with the support of the following entities:
+This project exists thanks to the current of former support of the following entities:
 
 * AdaCore, provider of the open source Ada 2012 compiler https://www.adacore.com/community
 * The Robotics, Perception and Real-Time group, RoPeRT, http://robots.unizar.es