Export CMAKE_PREFIX_PATH in helper installation scripts (#2887)

* Export CMAKE_PREFIX_PATH in helper installation scripts

* Also add to docker file

* Add if

* Fix capitalization

cpp/cmake/templates/dolfinx.conf.in

@@ -4,6 +4,7 @@
 export @OS_LIBRARY_PATH_NAME@=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@:$@OS_LIBRARY_PATH_NAME@
 export PATH=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_BINDIR@:$PATH
 export PKG_CONFIG_PATH=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@/pkgconfig:$PKG_CONFIG_PATH
+export CMAKE_PREFIX_PATH=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@/cmake:$CMAKE_PREFIX_PATH
 
 # Special macOS variables
 export DYLD_FRAMEWORK_PATH=/opt/local/Library/Frameworks:$DYLD_FRAMEWORK_PATH

docker/Dockerfile.end-user

@@ -107,6 +107,7 @@ ONBUILD RUN cd dolfinx && \
 
 # Real by default.
 ONBUILD ENV PKG_CONFIG_PATH=/usr/local/dolfinx-real/lib/pkgconfig:$PKG_CONFIG_PATH \
+    CMAKE_PREFIX_PATH=/usr/local/dolfinx-real/lib/cmake:$CMAKE_PREFIX_PATH \
     PETSC_ARCH=linux-gnu-real64-32 \
     PYTHONPATH=/usr/local/dolfinx-real/lib/python${PYTHON_VERSION}/dist-packages:$PYTHONPATH \
     LD_LIBRARY_PATH=/usr/local/dolfinx-real/lib:$LD_LIBRARY_PATH

docker/dolfinx-complex-mode

@@ -1,6 +1,7 @@
 #!/bin/bash
 PYV=`python3 -c "import sys;t='{v[0]}.{v[1]}'.format(v=list(sys.version_info[:2]));sys.stdout.write(t)";`
 export PKG_CONFIG_PATH=/usr/local/dolfinx-complex/lib/pkgconfig:$PKG_CONFIG_PATH
+export CMAKE_PREFIX_PATH=/usr/local/dolfinx-complex/lib/cmake:$CMAKE_PREFIX_PATH
 export PETSC_ARCH=linux-gnu-complex128-32
 export PYTHONPATH=/usr/local/dolfinx-complex/lib/python$PYV/dist-packages:$PYTHONPATH
 export LD_LIBRARY_PATH=/usr/local/dolfinx-complex/lib:$LD_LIBRARY_PATH

docker/dolfinx-real-mode

@@ -1,6 +1,7 @@
 #!/bin/bash
 PYV=`python3 -c "import sys;t='{v[0]}.{v[1]}'.format(v=list(sys.version_info[:2]));sys.stdout.write(t)";`
 export PKG_CONFIG_PATH=/usr/local/dolfinx-real/lib/pkgconfig:$PKG_CONFIG_PATH
+export CMAKE_PREFIX_PATH=/usr/local/dolfinx-real/lib/cmake:$CMAKE_PREFIX_PATH
 export PETSC_ARCH=linux-gnu-real64-32
 export PYTHONPATH=/usr/local/dolfinx-real/lib/python$PYV/dist-packages:$PYTHONPATH
 export LD_LIBRARY_PATH=/usr/local/dolfinx-real/lib:$LD_LIBRARY_PATH

python/CMakeLists.txt

@@ -29,15 +29,19 @@ execute_process(
   ERROR_VARIABLE BASIX_ERROR_OUT OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 find_package(Basix REQUIRED CONFIG HINTS ${BASIX_PY_DIR})
+if (Basix_FOUND)
+  message(STATUS "Found Basix at ${Basix_DIR}")
+endif()
 find_package(DOLFINX REQUIRED CONFIG)
+if (DOLFINX_FOUND)
+  message(STATUS "Found DOLFINx at ${DOLFINX_DIR}")
+endif()
 
 # Create the binding library nanobind handles its own calls to
 # target_link_libraries
 nanobind_add_module(
   cpp
   MODULE
-
-  # NB_SHARED
   dolfinx/wrappers/dolfinx.cpp
   dolfinx/wrappers/assemble.cpp
   dolfinx/wrappers/common.cpp