[cmake] internal target split

include/CMakeLists.txt

@@ -36,8 +36,8 @@ OTHER DEALINGS IN THE SOFTWARE.
 
 For more information, please refer to <https://unlicense.org> ]]
 
-# @todo Add an internal CMakeLists file to simplify and separate this one.
 add_library(kalman INTERFACE)
+target_link_libraries(kalman INTERFACE kalman_internal)
 target_sources(
   kalman
   INTERFACE FILE_SET
@@ -46,18 +46,6 @@ target_sources(
             "HEADERS"
             FILES
             "fcarouge/algorithm.hpp"
-            "fcarouge/internal/factory.hpp"
-            "fcarouge/internal/format.hpp"
-            "fcarouge/internal/function.hpp"
-            "fcarouge/internal/kalman.tpp"
-            "fcarouge/internal/type.hpp"
-            "fcarouge/internal/utility.hpp"
-            "fcarouge/internal/x_z_p_q_r_h_f.hpp"
-            "fcarouge/internal/x_z_p_q_r_hh_us_ps.hpp"
-            "fcarouge/internal/x_z_p_qq_rr_f.hpp"
-            "fcarouge/internal/x_z_p_r_f.hpp"
-            "fcarouge/internal/x_z_u_p_q_r_f_g_ps.hpp"
-            "fcarouge/internal/x_z_u_p_q_r_us_ps.hpp"
             "fcarouge/kalman.hpp"
             "fcarouge/utility.hpp")
 install(
@@ -71,3 +59,5 @@ install(
 if(NOT TARGET kalman::kalman)
   add_library(kalman::kalman ALIAS kalman)
 endif()
+
+add_subdirectory(fcarouge)

include/fcarouge/CMakeLists.txt

@@ -0,0 +1,62 @@
+#[[ __          _      __  __          _   _
+| |/ /    /\   | |    |  \/  |   /\   | \ | |
+| ' /    /  \  | |    | \  / |  /  \  |  \| |
+|  <    / /\ \ | |    | |\/| | / /\ \ | . ` |
+| . \  / ____ \| |____| |  | |/ ____ \| |\  |
+|_|\_\/_/    \_\______|_|  |_/_/    \_\_| \_|
+
+Kalman Filter
+Version 0.4.0
+https://github.com/FrancoisCarouge/Kalman
+
+SPDX-License-Identifier: Unlicense
+
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org> ]]
+
+add_library(kalman_internal INTERFACE)
+target_sources(
+  kalman_internal
+  INTERFACE FILE_SET
+            "kalman_headers"
+            TYPE
+            "HEADERS"
+            FILES
+            "internal/factory.hpp"
+            "internal/format.hpp"
+            "internal/function.hpp"
+            "internal/kalman.tpp"
+            "internal/type.hpp"
+            "internal/utility.hpp"
+            "internal/x_z_p_q_r_h_f.hpp"
+            "internal/x_z_p_q_r_hh_us_ps.hpp"
+            "internal/x_z_p_qq_rr_f.hpp"
+            "internal/x_z_p_r_f.hpp"
+            "internal/x_z_u_p_q_r_f_g_ps.hpp"
+            "internal/x_z_u_p_q_r_us_ps.hpp")
+install(
+  TARGETS kalman_internal
+  EXPORT "kalman-target"
+  FILE_SET "kalman_headers")