add an option for full install,

.github/workflows/tests.yml

@@ -244,6 +244,25 @@ jobs:
       - name: Run tests
         run: ctest --output-on-failure -L Packaging
         working-directory: build
+
+  install-precompiled-all:
+    name: install tests precompiled full install
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Configure
+        run: cmake -S . -B build -DCLI11_INSTALL_PACKAGE_TESTS=ON -DCLI11_ENABLE_EXTRA_VALIDATORS=ON -DCMAKE_INSTALL_PREFIX=/home/runner/work/install -DCLI11_PRECOMPILED=ON -DCLI11_FULL_INSTALL=ON
+      - name: Build
+        run: cmake --build build  -j2
+      - name: install
+        run: cmake --install build
+      - name: Configure2
+        run: cmake -S . -B build -DCLI11_INSTALL_PACKAGE_TESTS=ON -DCMAKE_INSTALL_PREFIX=/home/runner/work/install
+      - name: Run tests
+        run: ctest --output-on-failure -L Packaging
+        working-directory: build
 
   install-precompiled-macos:
     name: install tests precompiled macos

CMakeLists.txt

@@ -79,6 +79,10 @@ cmake_dependent_option(CLI11_BUILD_EXAMPLES "Build CLI11 examples" ON
 cmake_dependent_option(CLI11_BUILD_EXAMPLES_JSON "Build CLI11 json example" OFF
                        "CLI11_BUILD_EXAMPLES;NOT CMAKE_VERSION VERSION_LESS 3.15" OFF)
 
+cmake_dependent_option(
+  CLI11_FULL_INSTALL "Install all headers regardless of SINGLE_FILE OR PRECOMPILED OPTIONS" OFF
+  "CLI11_SINGLE_FILE OR CLI11_PRECOMPILED" OFF)
+
 cmake_dependent_option(CLI11_SINGLE_FILE_TESTS "Duplicate all the tests for a single file build"
                        OFF "BUILD_TESTING;CLI11_SINGLE_FILE" OFF)
 
@@ -93,7 +97,9 @@ cmake_dependent_option(
   CLI11_CUDA_TESTS "Build the tests with NVCC to check for warnings there - requires CMake 3.9+"
   OFF "CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME" OFF)
 
-if(CLI11_PRECOMPILED AND CLI11_SINGLE_FILE)
+if(NOT CLI11_FULL_INSTALL
+   AND CLI11_PRECOMPILED
+   AND CLI11_SINGLE_FILE)
   # Sanity check
   message(FATAL_ERROR "CLI11_PRECOMPILE and CLI11_SINGLE_FILE are mutually exclusive")
 endif()
@@ -171,7 +177,7 @@ if(CLI11_CUDA_TESTS)
 endif()
 
 # This folder should be installed
-if(CLI11_INSTALL)
+if(CLI11_INSTALL OR CLI11_FULL_INSTALL)
 
   # Use find_package on the installed package
   # Since we have no custom code, we can directly write this

book/chapters/installation.md

@@ -185,6 +185,7 @@ default to off if CLI11 is used as a subdirectory in another project.
 | `CLI11_BUILD_EXAMPLES=ON`      | Build the example programs.                                                      |
 | `CLI11_BUILD_EXAMPLES_JSON=ON` | Build some additional example using json libraries                               |
 | `CLI11_INSTALL=ON`             | install CLI11 to the install folder during the install process                   |
+| `CLI11_FULL_INSTALL=ON`        | install all CLI11 headers/libraries regardless of other settings                 |
 | `CLI11_FORCE_LIBCXX=OFF`       | use libc++ instead of libstdc++ if building with clang on linux                  |
 | `CLI11_CUDA_TESTS=OFF`         | build the tests with NVCC                                                        |
 | `CLI11_BUILD_TESTS=ON`         | Build the tests.                                                                 |

single-include/CMakeLists.txt

@@ -17,7 +17,7 @@ if(CLI11_SINGLE_FILE)
   add_custom_target(CLI11-generate-single-file ALL
                     DEPENDS "${PROJECT_BINARY_DIR}/single-include/CLI11.hpp")
   set_property(TARGET CLI11-generate-single-file PROPERTY FOLDER "Scripts")
-  if(CLI11_INSTALL)
+  if(CLI11_INSTALL OR CLI11_FULL_INSTALL)
     install(FILES "${PROJECT_BINARY_DIR}/single-include/CLI11.hpp"
             DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
   endif()

src/CMakeLists.txt

@@ -44,14 +44,14 @@ if(CMAKE_CXX_STANDARD LESS 14)
   target_compile_features(CLI11 INTERFACE cxx_std_11)
 endif()
 
-if(CLI11_INSTALL)
+if(CLI11_INSTALL OR CLI11_FULL_INSTALL)
 
   # Make an export target
   install(TARGETS CLI11 EXPORT CLI11Targets)
-  if(NOT CLI11_SINGLE_FILE)
+  if((NOT CLI11_SINGLE_FILE) OR CLI11_FULL_INSTALL)
     install(FILES ${CLI11_headers} ${CLI11_library_headers}
             DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/CLI")
-    if(NOT CLI11_PRECOMPILED)
+    if((NOT CLI11_PRECOMPILED) OR CLI11_FULL_INSTALL)
       install(FILES ${CLI11_impl_headers} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/CLI/impl")
     endif()
   endif()