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I am developing for the esp8266 using platformIO, which in turn uses the esp8266 arduino core. The default build does not link against the stdc++ library, so I cannot use std:map. I can successfully compile my sketch in the arduino IDE by modifying the linker setting as described here, I just need to achieve the same thing in platform IO. I have tried adding "stdc++" to the LIBS array in the espressif.py builder script to no avail.

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The problem was an error in PlatformIO due to library linking order. One of the team members wrote a fix that will prsesumably be merged into the main distro soon. Details and link to working build are here.

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