Unable to solve error ".o uses VFP register arguments, .elf does not"

maxgerhardt · May 21, 2023, 2:16pm

Ah, the problem was that the flags have to be set accross all construction environments. Also it must be hard float.

Import("env")
Import("projenv")

for e in [env, projenv, DefaultEnvironment()]:
    e.Append(
        CCFLAGS=[
            "-mfloat-abi=hard",
            "-mfpu=fpv5-sp-d16",
        ],
        LINKFLAGS=[
            "-mfloat-abi=hard",
            "-mfpu=fpv5-sp-d16",
        ]
    )

Worked fine with the basic most

[env:nucleo_f756zg]
platform = ststm32
board = nucleo_f756zg
framework = stm32cube
build_flags =
    -Isrc/BSEC/Inc
    -Lsrc/BSEC
    -lalgobsec
extra_scripts = SetFlags.py

and a src/main.c of just

#include <stm32f7xx_hal.h>
/* BSEC header files are available in the inc/ folder of the release package */
#include "bsec_interface.h"
#include "bsec_datatypes.h"

int main() {
    bsec_version_t ver;
    bsec_get_version(&ver);
    return 0;
}

grafik