ESP8266 Community Forum

- Sat Nov 21, 2015 11:06 am #34626 Arduino IDE 1.6.5-r5, last ESP8266 mod.
I have tried to include some barometer libraries for BMP080/BMP180, such as

Code: Select all#include <SFE_BMP180.h>
or
#include <Adafruit_BMP085.h>
or
#include <Adafruit_BMP085_U>

as described in section of "Examples" in this forum.
But I alwais have the same compilation error:
Arduino: 1.6.5 (Windows 7), Board "Generic ESP8266 Module, Serial, 80 MHz, 40MHz, DIO, 115200, 512K (64K SPIFFS)"
c:/users/sfu/appdata/roaming/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/lib\libm.a(lib_a-e_pow.o):(.literal+0x108): undefined reference to `__ieee754_sqrt'
c:/users/sfu/appdata/roaming/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/lib\libm.a(lib_a-e_pow.o): In function `__ieee754_pow':
d:\ivan\projects\arduinoesp\toolchain\dl\esp-newlib\build\xtensa-lx106-elf\newlib\libm\math/../../../../../newlib/libm/math/e_pow.c:164: undefined reference to `__ieee754_sqrt'
collect2.exe: error: ld returned 1 exit status

Any another programms or samples compiled well. I think the problem related to advanced mathematics for barometer in mentioned libraries...

- Sat Nov 21, 2015 11:11 am #34627 P.S. Just specially checked again: the compiler works nice for any ATMega boards. The problem is really related to ESP8266 mod only.

- Sat Nov 21, 2015 11:14 am #34628 Sqrt is not currently supported - same issue as viewtopic.php?f=28&t=6043

David

- Sat Nov 21, 2015 12:17 pm #34631 Try the staging version which may have a fix for this problem.

https://github.com/esp8266/arduino#staging-version-