From 99fdde39d3fe43a40e765335c6443dc04a01b1ee Mon Sep 17 00:00:00 2001
From: pradal <christophe.pradal@cirad.fr>
Date: Tue, 16 Sep 2025 11:36:44 +0200
Subject: [PATCH] Add options for flang

---
 conda/conda_build_config.yaml | 2 --
 conda/meta.yaml               | 6 +++---
 native.ini                    | 3 +++
 src/openalea/ratp/meson.build | 7 +++++++
 4 files changed, 13 insertions(+), 5 deletions(-)
 delete mode 100644 conda/conda_build_config.yaml
 create mode 100644 native.ini

diff --git a/conda/conda_build_config.yaml b/conda/conda_build_config.yaml
deleted file mode 100644
index 543eff2d..00000000
--- a/conda/conda_build_config.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-c_compiler:
-  - m2w64-toolchain          # [win]
\ No newline at end of file
diff --git a/conda/meta.yaml b/conda/meta.yaml
index 82c13768..2ba78bc6 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -19,8 +19,8 @@ source:
 build:
   number: 0
   string: py{{ PY_VER }}
-  script_env:
-    - CC=gcc # [win]
+  #script_env:
+  #  - CC=gcc # [win]
   preserve_egg_dir: True
   script: {{ PYTHON }} -m pip install . --no-deps --ignore-installed --no-build-isolation -vv
 
@@ -35,7 +35,7 @@ requirements:
     {% for dep in build_deps %}
     - {{ dep }}
     {% endfor  %}
-    - {{ compiler('fortran') }}  # [not win]
+    - {{ compiler('fortran') }}
     - {{ compiler('c') }}
     - charset-normalizer
   run:
diff --git a/native.ini b/native.ini
new file mode 100644
index 00000000..f5f6b62e
--- /dev/null
+++ b/native.ini
@@ -0,0 +1,3 @@
+[binaries]
+fortran = 'flang'
+
diff --git a/src/openalea/ratp/meson.build b/src/openalea/ratp/meson.build
index 0362fda5..d786034a 100644
--- a/src/openalea/ratp/meson.build
+++ b/src/openalea/ratp/meson.build
@@ -4,6 +4,13 @@ py_mod = import('python')
 py = py_mod.find_installation(pure: false)
 py_dep = py.dependency()
 
+
+
+# Conditionally add Flang runtime linker flags only on Windows
+if host_machine.system() == 'windows'
+    add_project_link_arguments(['-lFortranRuntime', '-lFortranDecimal'], language : 'fortran')
+endif
+
 sources = files([
   '../../f90/mod_Constant_ValuesF2PY.f90',
   '../../f90/mod_Grid3DF2PY_64bit.f90',