Description
PROBLEM DESCRIPTION
After updating to the latest pioarduino/platform-espressif32, PlatformIO started generating a malformed .map file in the project root, with a name like:
DesktopBlink.piobuildesp32devfirmware.map
This happens on Windows and seems to be caused by a corrupted -Wl,-Map=... linker flag, where the full path is being passed without proper escaping or quotes, resulting in the entire path being interpreted as the filename.
This issue did not happen before the platform update and appears to be introduced by a recent change.
EXPECTED BEHAVIOR
Only a correctly named .map file should be generated in the build directory:
.pio/build/esp32dev/firmware.map
ACTUAL BEHAVIOR
An additional .map file is created in the root of the project, with a malformed name that concatenates the full path, missing all slashes.
SYSTEM INFO
- OS: Windows 11
- PlatformIO Core: 6.1.18
- platform-espressif32: using
platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.21/platform-espressif32.zip - Board:
esp32dev
TEMPORARY FIX
To prevent this behavior, I added the following extra_script to my project:
# scripts/fix_map_flag.py
Import("env")
env.ProcessUnFlags(["-Wl,-Map"])
env.Append(LINKFLAGS=["-Wl,-Map=.pio/build/%s/firmware.map" % env["PIOENV"]])And included it in platformio.ini:
extra_scripts = scripts/fix_map_flag.pyAfter this, the unwanted .map file no longer appears in the project root.
SUGGESTED FIX
Please check how the -Map linker flag is being generated on Windows. It seems the path is not being properly escaped or normalized. A fix might involve wrapping it in quotes or using os.path.normpath() during path construction.