From b147830ef954ed5d6c012a041c5b20ea7d88f93b Mon Sep 17 00:00:00 2001 From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com> Date: Fri, 13 Mar 2026 14:24:39 -0400 Subject: [PATCH] [core] Fix std::isnan conflict with picolibc on ESP-IDF 6.0 (#14768) Co-authored-by: Claude Opus 4.6 --- esphome/core/config.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/esphome/core/config.py b/esphome/core/config.py index d4a839cb795..e112720f2b4 100644 --- a/esphome/core/config.py +++ b/esphome/core/config.py @@ -589,7 +589,10 @@ async def _add_looping_components() -> None: async def to_code(config: ConfigType) -> None: cg.add_global(cg.global_ns.namespace("esphome").using) # These can be used by user lambdas, put them to default scope + # picolibc (IDF 6.0+) declares isnan in global scope, conflicting with using std::isnan + cg.add_global(cg.RawStatement("#ifndef __PICOLIBC__")) cg.add_global(cg.RawExpression("using std::isnan")) + cg.add_global(cg.RawStatement("#endif")) cg.add_global(cg.RawExpression("using std::min")) cg.add_global(cg.RawExpression("using std::max"))