Update CI workflow and cpp-library dependency

The CI workflow now sets CC and CXX environment variables conditionally based on the matrix, and splits the build/install steps accordingly. The cpp-library dependency is updated to commit 4f09b3b7f0abcc4ef1b39060ce03784920ce32e5 in CMakeLists.txt.

Author: sean-parent

.github/workflows/ci.yml

@@ -58,6 +58,17 @@ jobs:
           cmake --preset=default
           cmake --build --preset=default
           cmake --install build/default --prefix ${{ runner.temp }}/install
+        env:
+          CC: ${{ matrix.cc }}
+          CXX: ${{ matrix.cxx }}
+        if: ${{ matrix.cc }}
+
+      - name: Build and Install
+        run: |
+          cmake --preset=default
+          cmake --build --preset=default
+          cmake --install build/default --prefix ${{ runner.temp }}/install
+        if: ${{ !matrix.cc }}
 
       - name: Test find_package
         shell: bash

CMakeLists.txt

@@ -16,7 +16,7 @@ include(cmake/CPM.cmake)
 #     NAME cpp-library
 #     URL "${CMAKE_SOURCE_DIR}/../cpp-library"
 # )
-CPMAddPackage("gh:stlab/cpp-library#e4a3ee5dc2da1d05d44a7b74a142c94a53de8003")
+CPMAddPackage("gh:stlab/cpp-library#4f09b3b7f0abcc4ef1b39060ce03784920ce32e5")
 # CPMAddPackage("gh:stlab/cpp-library@4.0.5")
 
 include(${cpp-library_SOURCE_DIR}/cpp-library.cmake)