HDF5: make much more robust across platforms

This addresses various real-world problems with HDF5 pkg-config, including

* hdf*.pc with package versions as part of the filename
* malformed hdf*.pc missing the commonly-used HDF5 HL module

---

Additionally, this refactors more complicated dependencies such as
HDF5 and OpenMPI. This may help us deduplicate internal dependency
code in the future.

HDF5 selftest: improve platform-agnostic test

ci: init demo github action for HDF5 framework

ci Actions: hold off on MSYS2 for now [skip ci]

hdf5: ensure C libraries always included

ci: mac hdf5--use clang+gfortran

1 files changed, 0 insertions, 47 deletions

diff --git a/mesonbuild/dependencies/misc.py b/mesonbuild/dependencies/misc.py
index 789015a..bfd450c 100644
--- a/mesonbuild/dependencies/misc.py
+++ b/mesonbuild/dependencies/misc.py
@@ -30,53 +30,6 @@ from .base import (
 )
 
 
-class HDF5Dependency(ExternalDependency):
-
-    def __init__(self, environment, kwargs):
-        language = kwargs.get('language', 'c')
-        super().__init__('hdf5', environment, language, kwargs)
-        kwargs['required'] = False
-        kwargs['silent'] = True
-        self.is_found = False
-
-        pkgconfig_files = ['hdf5']
-
-        if language not in ('c', 'cpp', 'fortran'):
-            raise DependencyException('Language {} is not supported with HDF5.'.format(language))
-
-        for pkg in pkgconfig_files:
-            try:
-                pkgdep = PkgConfigDependency(pkg, environment, kwargs, language=self.language)
-                if pkgdep.found():
-                    self.compile_args = pkgdep.get_compile_args()
-                    # derive needed libraries by language
-                    pd_link_args = pkgdep.get_link_args()
-                    link_args = []
-                    for larg in pd_link_args:
-                        lpath = Path(larg)
-                        if lpath.is_file():
-                            if language == 'cpp':
-                                link_args.append(str(lpath.parent / (lpath.stem + '_hl_cpp' + lpath.suffix)))
-                                link_args.append(str(lpath.parent / (lpath.stem + '_cpp' + lpath.suffix)))
-                            elif language == 'fortran':
-                                link_args.append(str(lpath.parent / (lpath.stem + 'hl_fortran' + lpath.suffix)))
-                                link_args.append(str(lpath.parent / (lpath.stem + '_fortran' + lpath.suffix)))
-
-                            # HDF5 C libs are required by other HDF5 languages
-                            link_args.append(str(lpath.parent / (lpath.stem + '_hl' + lpath.suffix)))
-                            link_args.append(larg)
-                        else:
-                            link_args.append(larg)
-
-                    self.link_args = link_args
-                    self.version = pkgdep.get_version()
-                    self.is_found = True
-                    self.pcdep = pkgdep
-                    break
-            except Exception:
-                pass
-
-
 class NetCDFDependency(ExternalDependency):
 
     def __init__(self, environment, kwargs):