netcdf-c package: fix hdf5 linking on Windows (#42749)

var/spack/repos/builtin/packages/netcdf-c/netcdfc_correct_and_export_link_interface.patch

@@ -1,8 +1,34 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 9b057311..37e96a96 100644
+index de95010c..25229f9c 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -1471,6 +1471,7 @@ ENDIF()
+@@ -664,6 +664,7 @@ ENDIF(ENABLE_STRICT_NULL_BYTE_HEADER_PADDING)
+ # *
+ ##
+ SET(USE_HDF5 ${ENABLE_HDF5})
++SET(IMPORT_HDF5 "")
+ IF(USE_HDF5)
+ 
+   ##
+@@ -671,7 +672,6 @@ IF(USE_HDF5)
+   ##
+   SET(HDF5_VERSION_REQUIRED 1.8.10)
+ 
+-
+   ##
+   # Accommodate developers who have hdf5 libraries and
+   # headers on their system, but do not have a the hdf
+@@ -744,6 +744,9 @@ IF(USE_HDF5)
+     ELSE(MSVC)
+       FIND_PACKAGE(HDF5 COMPONENTS C HL REQUIRED)
+     ENDIF(MSVC)
++    # Export HDF5 Dependency so consumers can properly use
++    # exported link interface
++    set(IMPORT_HDF5 "find_dependency(HDF5 COMPONENTS C HL)")
+ 
+     ##
+     # Next, check the HDF5 version. This will inform which
+@@ -1481,6 +1484,7 @@ ENDIF()
  
  # Enable Parallel IO with netCDF-4/HDF5 files using HDF5 parallel I/O.
  SET(STATUS_PARALLEL "OFF")
@@ -10,14 +36,23 @@ index 9b057311..37e96a96 100644
  OPTION(ENABLE_PARALLEL4 "Build netCDF-4 with parallel IO" "${HDF5_PARALLEL}")
  IF(ENABLE_PARALLEL4 AND ENABLE_HDF5)
    IF(NOT HDF5_PARALLEL)
-@@ -1492,6 +1493,7 @@ IF(ENABLE_PARALLEL4 AND ENABLE_HDF5)
+@@ -1502,6 +1506,7 @@ IF(ENABLE_PARALLEL4 AND ENABLE_HDF5)
      FILE(COPY "${netCDF_BINARY_DIR}/tmp/run_par_tests.sh"
        DESTINATION ${netCDF_BINARY_DIR}/h5_test
        FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
-+    set(IMPORT_MPI "include(CMakeFindDependencyMacro)\nfind_dependency(mpi COMPONENTS C)")
++    set(IMPORT_MPI "find_dependency(MPI COMPONENTS C)")
    ENDIF()
  ENDIF()
  
+@@ -2652,6 +2657,8 @@ endif(DEFINED ENV{LIB_FUZZING_ENGINE})
+ # cmake should be able to find netcdf using find_package and find_library.
+ # The EXPORT call is paired with one in liblib.
+ set(ConfigPackageLocation ${CMAKE_INSTALL_LIBDIR}/cmake/netCDF)
++set(IMPORT_FIND_DEP "include(CMakeFindDependencyMacro)")
++
+ 
+ install(EXPORT netCDFTargets
+   DESTINATION ${ConfigPackageLocation}
 diff --git a/liblib/CMakeLists.txt b/liblib/CMakeLists.txt
 index e3eddc0f..0493cb9d 100644
 --- a/liblib/CMakeLists.txt
@@ -31,14 +66,16 @@ index e3eddc0f..0493cb9d 100644
  
  IF(MOD_NETCDF_NAME)
 diff --git a/netCDFConfig.cmake.in b/netCDFConfig.cmake.in
-index 9d68eec5..dae2429e 100644
+index 9d68eec5..eece09cb 100644
 --- a/netCDFConfig.cmake.in
 +++ b/netCDFConfig.cmake.in
-@@ -14,6 +14,8 @@ set(netCDF_LIBRARIES netCDF::netcdf)
+@@ -14,6 +14,10 @@ set(netCDF_LIBRARIES netCDF::netcdf)
  # include target information
  include("${CMAKE_CURRENT_LIST_DIR}/netCDFTargets.cmake")
  
++@IMPORT_FIND_DEP@
 +@IMPORT_MPI@
++@IMPORT_HDF5@
 +
  # Compiling Options
  #

var/spack/repos/builtin/packages/netcdf-c/package.py

@@ -58,9 +58,12 @@ class NetcdfC(CMakePackage, AutotoolsPackage):
         #  with the following patch:
         patch("4.8.1-win-hdf5-with-zlib.patch", when="@4.8.1: platform=windows")
 
-        # TODO: fetch from the upstream repo once https://github.com/Unidata/netcdf-c/pull/2595
-        #  is accepted:
-        patch("netcdfc-mpi-win-support.patch", when="platform=windows")
+        # TODO: https://github.com/Unidata/netcdf-c/pull/2595 contains some of the changes
+        # made in this patch but is not sufficent to replace the patch. There is currently
+        # no upstream PR (or set of PRs) covering all changes in this path.
+        # When #2595 lands, this patch should be updated to include only
+        # the changes not incorporated into that PR
+        patch("netcdfc_correct_and_export_link_interface.patch", when="platform=windows")
 
     # Some of the patches touch configure.ac and, therefore, require forcing the autoreconf stage:
     _force_autoreconf_when = []
@@ -342,6 +345,10 @@ def cmake_args(self):
         if "platform=windows" in self.pkg.spec:
             # Enforce the usage of the vendored version of bzip2 on Windows:
             base_cmake_args.append(self.define("Bz2_INCLUDE_DIRS", ""))
+        if "+shared" in self.pkg.spec["hdf5"]:
+            base_cmake_args.append(self.define("NC_FIND_SHARED_LIBS", True))
+        else:
+            base_cmake_args.append(self.define("NC_FIND_SHARED_LIBS", False))
         return base_cmake_args