try debug anaconda windows build according to scipy

packaging/conda/bld.bat

@@ -0,0 +1,38 @@
+@echo on
+setlocal enabledelayedexpansion
+
+mkdir builddir
+
+:: check if clang-cl is on path as required
+clang-cl.exe --version
+if %ERRORLEVEL% neq 0 exit 1
+
+:: set compilers to clang-cl
+set "CC=clang-cl"
+
+:: flang 17 still uses "temporary" name
+set "FC=flang-new"
+
+:: need to read clang version for path to compiler-rt
+FOR /F "tokens=* USEBACKQ" %%F IN (`clang.exe -dumpversion`) DO (
+    SET "CLANG_VER=%%F"
+)
+
+:: attempt to match flags for flang as we set them for clang-on-win, see
+:: https://github.com/conda-forge/clang-win-activation-feedstock/blob/main/recipe/activate-clang_win-64.sh
+:: however, -Xflang --dependent-lib=msvcrt currently fails as an unrecognized option, see also
+:: https://github.com/llvm/llvm-project/issues/63741
+set "FFLAGS=-D_CRT_SECURE_NO_WARNINGS -D_MT -D_DLL --target=x86_64-pc-windows-msvc -nostdlib"
+set "LDFLAGS=--target=x86_64-pc-windows-msvc -nostdlib -Xclang --dependent-lib=msvcrt -fuse-ld=lld"
+set "LDFLAGS=%LDFLAGS% -Wl,-defaultlib:%BUILD_PREFIX%/Library/lib/clang/!CLANG_VER:~0,2!/lib/windows/clang_rt.builtins-x86_64.lib"
+
+:: see explanation here:
+:: https://github.com/conda-forge/scipy-feedstock/pull/253#issuecomment-1732578945
+set "MESON_RSP_THRESHOLD=320000"
+
+:: -wnx flags mean: --wheel --no-isolation --skip-dependency-check
+%PYTHON% -m pip install --no-deps --no-build-isolation --ignore-installed ^
+    --config-settings=builddir=builddir ^
+    --config-settings=setup-args=-Dfortran_std=none ^
+	.
+if %ERRORLEVEL% neq 0 (type builddir\meson-logs\meson-log.txt && exit 1)

packaging/conda/conda_build_config.yaml

@@ -1,13 +1,13 @@
 python:
-  - 3.9
-  - 3.10
+  # - 3.9
+  # - 3.10
   - 3.11
-#  - 3.12
+  # - 3.12
 numpy:
+  # - 1.23
+  # - 1.23
   - 1.23
-  - 1.23
-  - 1.23
-#  - 1.26
+  # - 1.26
 zip_keys:
   - python
   - numpy

packaging/conda/meta.yaml

@@ -10,22 +10,25 @@ source:
 build:
   number: 0
   include_recipe: True
-  script: "python -m pip install --no-deps --ignore-installed . -vv"
+  # script: "python -m pip install --no-deps --ignore-installed . -vv"
 
 requirements:
   build:
     - {{ compiler('c') }}
+    - {{ compiler('cxx') }}
     - {{ compiler('fortran') }}   # [unix]
-    - m2w64-gcc-fortran           # [win]
+    - clang                       # [win]
+    - flang                       # [win]
+    - lld                         # [win]
   host:
+    - compiler-rt                 # [win]
     - python {{ python }}
     - setuptools
     - numpy {{ numpy }}
     - meson>=1.2.3
     - meson-python
     - ninja
-    - scipy
-    - matplotlib
+    - pip
   run:
     - python {{ python }}
     - setuptools
@@ -43,9 +46,9 @@ test:
     - python -s -c "import pysces; pysces.test(3)"
 
 about:
-  home: http://pysces.sourceforge.net
+  home: http://pysces.github.io
   license: BSD
-  licence_file: LICENCE.txt
+  license_file: LICENSE.txt
   summary: Python Simulator for Cellular Systems
 
 extra: