Hi Jet, Thank you for your response. Here is my information: Item My Info BSEC Version BSEC 1.4.8.0 Compiler arm-none-eabi-gcc - version 4.9.3 Compiling Command: (provided for the bme680 driver) arm-none-eabi-gcc -Iinclude -I<includepath> -Og -g -Wall -std=c99 -ffreestanding -Isrc/lib/bme680_driver -mapcs-frame -fno-omit-frame-pointer -mpoke-function-name -Wpointer-arith -c src/lib/bme680_driver/bme680.c -o build/obj/bme680.o Linking Flags: LDFLAGS = -nostdlib -T src/boot/memmap -L<our lib directory> IDE None. MCU Type Raspberry Pi A+: Broadcom BCM2835 chip, with an ARM1176JFZ-S processor based on the ARMv6 architecture. Of note is that our project doesn't have stdlib, but we can look at including implementations of what is needed by llibalgobsec.a. Thanks again for your help. Kevin
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