hdf5 +mpich fails to pass cppflag pointing to MPICH headers

[barracuda156]

This is how hdf5 configures with +mpich:

        SUMMARY OF THE HDF5 CONFIGURATION
        =================================
General Information:
-------------------
                   HDF5 Version: 1.14.5
                  Configured on: Sun Nov 17 08:13:24 CST 2024
                  Configured by: root@36-227.wireless-city.scu.edu.tw
                    Host system: powerpc-apple-darwin10.0.0d2
              Uname information: Darwin 36-227.wireless-city.scu.edu.tw 10.0.0d2 Darwin Kernel Version 10.0.0d2: Fri Oct 10 19:37:52 PDT 2008; root:xnu-1346.7~1/RELEASE_PPC Power Macintosh
                       Byte sex: big-endian
             Installation point: /opt/local
Compiling Options:
------------------
                     Build Mode: production
              Debugging Symbols: no
                        Asserts: no
                      Profiling: no
             Optimization Level: high
Linking Options:
----------------
                      Libraries: static, shared
  Statically Linked Executables: 
                        LDFLAGS: -Wl,-headerpad_max_install_names -L/opt/local/lib -lMacportsLegacySupport -arch ppc
                     H5_LDFLAGS: 
                     AM_LDFLAGS:  -L/opt/local/lib/libaec/lib
                Extra libraries: -lsz -lz -ldl -lm 
                       Archiver: ar
                       AR_FLAGS: cr
                         Ranlib: ranlib
Languages:
----------
                              C: yes
                     C Compiler: ccache /opt/local/bin/mpicc-mpich-gcc14
                       CPPFLAGS: -isystem/opt/local/include/LegacySupport -I/opt/local/include
                    H5_CPPFLAGS:   -DNDEBUG -UH5_DEBUG_API -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_science_hdf5/hdf5/work/hdf5-1.14.5/src/H5FDsubfiling
                    AM_CPPFLAGS:  -I/opt/local/lib/libaec/include
                        C Flags: -pipe -Os -arch ppc
                     H5 C Flags:  -std=c99  -Wall -Wcast-qual -Wconversion -Wextra -Wfloat-equal -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-include-dirs -Wshadow -Wundef -Wwrite-strings -pedantic -Wno-c++-compat -Wlarger-than=2560 -Wlogical-op -Wframe-larger-than=16384 -Wpacked-bitfield-compat -Wsync-nand -Wno-unsuffixed-float-constants -Wdouble-promotion -Wtrampolines -Wstack-usage=8192 -Wmaybe-uninitialized -Wdate-time -Warray-bounds=2 -Wc99-c11-compat -Wduplicated-cond -Whsa -Wnormalized -Wnull-dereference -Wunused-const-variable -Walloca -Walloc-zero -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=1 -Wattribute-alias -Wshift-overflow=2 -Wattribute-alias=2 -Wmissing-profile -Wc11-c2x-compat -fstdarg-opt -fdiagnostics-urls=never -fno-diagnostics-color -s  -Wbad-function-cast -Wcast-align -Wformat -Wimplicit-function-declaration -Wint-to-pointer-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wpacked -Wpointer-sign -Wpointer-to-int-cast -Wredundant-decls -Wstrict-prototypes -Wswitch -Wunused-but-set-variable -Wunused-variable -Wunused-function -Wunused-parameter -Wincompatible-pointer-types -Wint-conversion -Wshadow -Wrestrict -Wcast-function-type -Wmaybe-uninitialized -Wcast-align=strict -Wno-aggregate-return -Wno-inline -Wno-missing-format-attribute -Wno-missing-noreturn -Wno-overlength-strings -Wno-jump-misses-init -Wstrict-overflow=2 -Wno-suggest-attribute=const -Wno-suggest-attribute=noreturn -Wno-suggest-attribute=pure -Wno-suggest-attribute=format -Wno-suggest-attribute=cold -Wno-suggest-attribute=malloc -O3
                     AM C Flags: 
               Shared C Library: yes
               Static C Library: yes
                        Fortran: yes
               Fortran Compiler: /opt/local/bin/mpif90-mpich-gcc14
                  Fortran Flags: -pipe -Os -m32
               H5 Fortran Flags:  -std=f2008  -Waliasing -Wall -Wcharacter-truncation -Wextra -Wimplicit-interface -Wsurprising -Wunderflow -pedantic -Wintrinsics-std -Wimplicit-procedure -Wreal-q-constant -Wfunction-elimination -Wrealloc-lhs -Wrealloc-lhs-all -Wno-c-binding-type -Winteger-division -Wfrontend-loop-interchange  -fdiagnostics-urls=never -fno-diagnostics-color -s  -Wno-unused-dummy-argument -Wno-array-temporaries -O3
               AM Fortran Flags: 
         Shared Fortran Library: yes
         Static Fortran Library: yes
               Module Directory: ${includedir}
                            C++: yes
                   C++ Compiler: ccache /opt/local/bin/mpicxx-mpich-gcc14
                      C++ Flags: -pipe -Os -D_GLIBCXX_USE_CXX11_ABI=0 -arch ppc
                   H5 C++ Flags:   -std=c++11 -Wall -Wcast-qual -Wconversion -Wctor-dtor-privacy -Weffc++ -Wextra -Wfloat-equal -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-include-dirs -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual -Wreorder -Wshadow -Wsign-promo -Wundef -Wwrite-strings -pedantic -Wlarger-than=2560 -Wlogical-op -Wframe-larger-than=16384 -Wpacked-bitfield-compat -Wsync-nand -Wdouble-promotion -Wtrampolines -Wstack-usage=8192 -Wmaybe-uninitialized -Wdate-time -Wopenmp-simd -Warray-bounds=2 -Wduplicated-cond -Whsa -Wnormalized -Wnull-dereference -Wunused-const-variable -Walloca -Walloc-zero -Wduplicated-branches -Wformat-overflow=2 -Wformat-truncation=1 -Wattribute-alias -Wshift-overflow=2 -Wattribute-alias=2 -Wmissing-profile -Wno-deprecated-copy -fstdarg-opt -fdiagnostics-urls=never -fno-diagnostics-color -s  -Wcast-align -Wmissing-declarations -Wpacked -Wredundant-decls -Wswitch -Wunused-but-set-variable -Wunused-function -Wunused-variable -Wunused-parameter -Wshadow -O3
                   AM C++ Flags: 
             Shared C++ Library: yes
             Static C++ Library: yes
                           Java: no
Features:
---------
                     Parallel HDF5: yes
  Parallel Filtered Dataset Writes: yes
                Large Parallel I/O: yes
                High-level library: yes
Dimension scales w/ new references: no
                  Build HDF5 Tests: yes
                  Build HDF5 Tools: yes
                   Build GIF Tools: no
                      Threadsafety: no
               Default API mapping: v114
    With deprecated public symbols: yes
            I/O filters (external): deflate(zlib),szip(no encoder)
                  _Float16 support: no
                     Map (H5M) API: no
                        Direct VFD: no
                        Mirror VFD: no
                     Subfiling VFD: no
                (Read-Only) S3 VFD: no
              (Read-Only) HDFS VFD: no
    Packages w/ extra debug output: none
                       API tracing: no
              Using memory checker: no
                  Use file locking: best-effort
         Strict file format checks: no
      Optimization instrumentation: no

Does it not need MPICH includes at all? If it needs them, there is little chance it gonna find those on its own in /opt/local/include/mpich-gcc14.

Apparently related problem with kealib which hardcodes a path to includes which point to nowhere if mpich-gcc* is used: ​https://github.com/ubarsc/kealib/issues/42