calling a function in a static library

[Frank]

Hello,

I was trying to call a few functions from librtc.a temprature_sens_read() and hall_sens_read().
But it seems the file doesn’t get linked.

linker command

I tried adding librtc.a in additional linker inputs with the absolute path. it only accepted it within quotes and it didn’t help.

I believe the library is included since -lrtc and -L../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib are included in the command

I succeeded in calling these functions when building esp-idf on my linux machine. I know those functions are there, how do I call them.

Thanks,

Frank

[support]

Hi,

Please try enabling verbose mode for the linker via VS Project Properties -> Linker -> Advanced. This should produce a massive debug output showing ALL the libraries checked by the linker. If librtc.a is on the list, but the problem still occurs, please try running the <target>-nm tool on the library to get a list of all symbols in it and double-check that this version of the library actually contains that symbol.

[Frank]

I’ve turned on verbose mode for the linker. BuildLinkerOut

1> attempt to open ../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a succeeded
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)bt_bb.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)pm.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)rtc_analog.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)rtc.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)rtc_clk.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)rtc_cntl.o
1> (../../../../../../SysGCC/esp32/esp32-bsp/esp-idf/components/esp32/lib\librtc.a)rtc_command.o

I’ve run the nm.exe nm output Line 102 contains the function I’d like to call.

00000040 T temprature_sens_read

From rtc_analog.o:

[support]

Hi,

Based on the log snippet you attached, this should work. Perhaps it is an extern “C” problem?

[Author]

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