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[esp32] Disable PicolibC Newlib compatibility shim on IDF 6.0+ (#15008)

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
J. Nick Koston
2026-03-20 15:10:18 -10:00
committed by GitHub
co-authored by Copilot
parent 32db055b98
commit 21e384cafd
1 changed files with 12 additions and 0 deletions
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esphome/components/esp32/__init__.py
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@@ -1920,6 +1920,18 @@ async def to_code(config):
add_idf_sdkconfig_option("CONFIG_MBEDTLS_SHA384_C", False)
add_idf_sdkconfig_option("CONFIG_MBEDTLS_SHA512_C", False)
# Disable PicolibC Newlib compatibility shim on IDF 6.0+
# IDF 6.0 switched from Newlib to PicolibC. The shim provides thread-local
# stdin/stdout/stderr and getreent() for code compiled against Newlib.
# ESPHome doesn't link against Newlib-built libraries that use stdio.
# If a component needs it (e.g. precompiled Newlib binaries), re-enable via:
# esp32:
# framework:
# sdkconfig_options:
# CONFIG_LIBC_PICOLIBC_NEWLIB_COMPATIBILITY: "y"
if idf_version() >= cv.Version(6, 0, 0):
add_idf_sdkconfig_option("CONFIG_LIBC_PICOLIBC_NEWLIB_COMPATIBILITY", False)
# Disable regi2c control functions in IRAM
# Only needed if using analog peripherals (ADC, DAC, etc.) from ISRs while cache is disabled
if advanced[CONF_DISABLE_REGI2C_IN_IRAM]: