From 06baaf89476b50e01130007fca3ca7db68accc0a Mon Sep 17 00:00:00 2001
From: MilesCranmerBot <miles.cranmer.bot@gmail.com>
Date: Sun, 11 Oct 2026 11:48:52 +0100
Subject: [PATCH] libpython: drop the unused C++ compiler

The shared library links no C++ runtime (libpython3.15.so.1.0 needs only libc, libm, libgcc_s and friends; the macOS dylib only libSystem), but the compiler's run-exports made every libpython build require libstdcxx >=15 on Linux and libcxx on macOS. Environments capped below libstdcxx 15 (e.g. Julia 1.10 and 1.12 via CondaPkg) therefore cannot install libpython, nor python 3.13/3.14 builds that pin it exactly.

Co-authored-by: Miles Cranmer <miles.cranmer@gmail.com>
---
 recipe/meta.yaml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 11189aa16..44247e152 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -4,7 +4,7 @@
 {% set ver2 = '.'.join(version.split('.')[0:2]) %}
 {% set ver2nd = ''.join(version.split('.')[0:2]) %}
 {% set ver3nd = ''.join(version.split('.')[0:3]) %}
-{% set build_number = 0 %}
+{% set build_number = 1 %}
 
 # this makes the linter happy
 {% set channel_targets = channel_targets or 'conda-forge main' %}
@@ -320,7 +320,6 @@ outputs:
       build:
         - {{ compiler('c') }}
         - {{ stdlib('c') }}
-        - {{ compiler('cxx') }}
       host:
         - {{ pin_subpackage('python', exact=True) }}
       run: