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platformio

How to generate a map file wth platformio

How do I generate a Map file from platformio ? Framework is mbed for stm32

I've tried passing linker flags in various ways but I get various errors

1. build_flags= -Wl, -Map=mapfile.map
2. build_flags= -Wl, Map=mapfile.map

For 1. I get the error message arm-none-eabi-gcc: error: unrecognized command line option '-Map=mapfile.map'

For 2. I get the linker error message ld.exe: error: 'Map=mapfile.map' not found

Solution

  • Your syntax of passing the build flags is not correct. Here is how to do it:

    build_flags = -Wl,-Map,output.map

    Reference: https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html