Fix install CMake files in architecture independent directory

.github/workflows/install.yml

@@ -0,0 +1,55 @@
+name: Install Test
+
+on:
+  workflow_call:
+  push:
+    branches: [ develop ]
+    tags: [ 'v*' ]
+  pull_request:
+    branches: [ develop ]
+
+jobs:
+  install-test:
+    name: ${{ matrix.distro }} (Multiheader=${{ matrix.multiheader }})
+    runs-on: ubuntu-latest
+    container: ${{ matrix.image }}
+    strategy:
+      fail-fast: false
+      matrix:
+        distro: [ubuntu-24.04, ubuntu-22.04, debian-bookworm, fedora]
+        multiheader: [ON, OFF]
+        include:
+          - distro: ubuntu-24.04
+            image: ubuntu:24.04
+            install_deps: apt-get update && apt-get install -y cmake ninja-build build-essential libeigen3-dev
+          - distro: ubuntu-22.04
+            image: ubuntu:22.04
+            install_deps: apt-get update && apt-get install -y cmake ninja-build build-essential libeigen3-dev
+          - distro: debian-bookworm
+            image: debian:bookworm
+            install_deps: apt-get update && apt-get install -y cmake ninja-build build-essential libeigen3-dev
+          - distro: fedora
+            image: fedora:latest
+            install_deps: dnf install -y cmake ninja-build gcc-c++ eigen3-devel
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Dependencies
+        run: ${{ matrix.install_deps }}
+
+      - name: Install OpenABF
+        run: |
+          cmake -G Ninja -S . -B build \
+            -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/install \
+            -DOPENABF_MULTIHEADER=${{ matrix.multiheader }}
+          cmake --install build
+
+      - name: Build Test Project
+        run: |
+          cmake -G Ninja -S tests/install -B build_install_test \
+            -DCMAKE_PREFIX_PATH=${{ github.workspace }}/install
+          cmake --build build_install_test
+
+      - name: Run Test
+        run: ./build_install_test/install_test

CMakeLists.txt

@@ -27,6 +27,7 @@ if(OPENABF_MULTIHEADER)
         include/OpenABF/ABFPlusPlus.hpp
         include/OpenABF/Exceptions.hpp
         include/OpenABF/HalfEdgeMesh.hpp
+        include/OpenABF/HierarchicalLSCM.hpp
         include/OpenABF/AngleBasedLSCM.hpp
         include/OpenABF/Math.hpp
         include/OpenABF/Vec.hpp

cmake/InstallProject.cmake

@@ -10,12 +10,12 @@ install(
     EXPORT OpenABFTargets
     FILE OpenABFTargets.cmake
     NAMESPACE OpenABF::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/OpenABF
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/OpenABF
 )
 
 install(
     FILES
         "${CMAKE_CURRENT_BINARY_DIR}/OpenABFConfig.cmake"
         "${CMAKE_CURRENT_BINARY_DIR}/OpenABFConfigVersion.cmake"
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/OpenABF
-)
+    DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/OpenABF
+)

tests/install/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.15)
+project(OpenABF_InstallTest)
+
+find_package(OpenABF REQUIRED)
+
+add_executable(install_test main.cpp)
+target_link_libraries(install_test OpenABF::OpenABF)

tests/install/main.cpp

@@ -0,0 +1,16 @@
+#include <cstdlib>
+#include <iostream>
+
+#include <OpenABF/OpenABF.hpp>
+
+int main()
+{
+    // Verify OpenABF types work (depends on Eigen being found transitively)
+    OpenABF::Vec3f v{1.0f, 2.0f, 3.0f};
+    if (v[0] != 1.0f || v[1] != 2.0f || v[2] != 3.0f) {
+        std::cerr << "Vec3f value mismatch" << std::endl;
+        return EXIT_FAILURE;
+    }
+    std::cout << "OpenABF find_package test passed" << std::endl;
+    return EXIT_SUCCESS;
+}