Add submodule "expected", add tl/expected to build

Author: ManifoldFR

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "cmake"]
 	path = cmake
 	url = https://github.com/jrl-umi3218/jrl-cmakemodules
+[submodule "src/third-party/expected"]
+	path = src/third-party/expected
+	url = [email protected]:TartanLlama/expected.git

CMakeLists.txt

@@ -411,6 +411,7 @@ function(create_library)
   endif()
   target_link_libraries(${PROJECT_NAME} PUBLIC proxsuite-nlp::proxsuite-nlp)
   target_link_libraries(${PROJECT_NAME} PUBLIC fmt::fmt)
+  target_link_libraries(${PROJECT_NAME} PUBLIC aligator_third_party)
   # set the install-tree include dirs
   # used by dependent projects to consume this target
   target_include_directories(
@@ -438,6 +439,7 @@ function(create_library)
   endforeach()
 endfunction()
 
+add_subdirectory(src/third-party)
 create_library()
 
 ADD_HEADER_GROUP(LIB_HEADERS)

src/third-party/CMakeLists.txt

@@ -0,0 +1,50 @@
+add_library(aligator_third_party INTERFACE)
+
+# Install third-party library to aligator's installed include and lib dirs.
+function(aligator_install_third_party target)
+  set(
+    THIRD_PARTY_INSTALL_INCLUDEDIR
+    ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/third-party
+  )
+  cmake_parse_arguments(
+    "EXT"
+    ""
+    "INCLUDE_DIR;HEADER_DESTINATION"
+    "HEADER_FILES"
+    ${ARGN}
+  )
+  install(
+    TARGETS ${target}
+    EXPORT ${TARGETS_EXPORT_NAME}
+    PUBLIC_HEADER DESTINATION ${THIRD_PARTY_INSTALL_INCLUDEDIR}
+  )
+  if(EXT_INCLUDE_DIR)
+    install(
+      DIRECTORY ${EXT_INCLUDE_DIR}
+      DESTINATION ${THIRD_PARTY_INSTALL_INCLUDEDIR}
+      FILES_MATCHING
+      REGEX ".*\\.(h|hpp|hxx)$"
+    )
+  endif()
+  # install individual header files
+  if(EXT_HEADER_FILES)
+    foreach(file ${EXT_HEADER_FILES})
+      install(
+        FILES ${file}
+        DESTINATION ${THIRD_PARTY_INSTALL_INCLUDEDIR}/${EXT_HEADER_DESTINATION}
+      )
+    endforeach()
+  endif()
+endfunction()
+
+add_library(expected INTERFACE)
+target_include_directories(
+  expected
+  INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/expected/include>
+)
+aligator_install_third_party(expected INCLUDE_DIR
+  ${CMAKE_CURRENT_SOURCE_DIR}/expected/include/tl
+)
+target_link_libraries(aligator_third_party INTERFACE expected)
+
+install(TARGETS aligator_third_party EXPORT ${TARGETS_EXPORT_NAME})