undefined reference to `swap_byte_32'

[redengin]

linking is failing with the following output. Its odd, since swap_byte_32 is declared as inline in bt_defs.h. Let me know if there is a more I can do to investigate this further.

Code: Select all

/home/redengin/opt/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/bt/libbt.a(bta_jv_act.c.obj):(.literal.bta_jv_start_discovery_cback+0x10): undefined reference to `swap_byte_32'
/home/redengin/opt/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/bt/libbt.a(bta_jv_act.c.obj): in function `bta_jv_start_discovery_cback':
/home/redengin/opt/esp-idf/components/bt/host/bluedroid/bta/jv/bta_jv_act.c:868: undefined reference to `swap_byte_32'
/home/redengin/opt/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/bt/libbt.a(btc_util.c.obj):(.literal.uuid_to_string_legacy+0x4): undefined reference to `swap_byte_32'
/home/redengin/opt/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/bt/libbt.a(btc_util.c.obj): in function `ntohl':
/home/redengin/opt/esp-idf/components/bt/host/bluedroid/common/include/common/bt_defs.h:112: undefined reference to `swap_byte_32'
/home/redengin/opt/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.2.0/../../../../xtensa-esp32-elf/bin/ld: /home/redengin/opt/esp-idf/components/bt/host/bluedroid/common/include/common/bt_defs.h:112: undefined reference to `swap_byte_32'
collect2: error: ld returned 1 exit status

[ESP_Angus]

Hi redengin,

This should probably be declared "inline static", will fix that.

However I'm not sure this explains the error you're seeing. Can you please give some details about your IDF version, configuration, and your app project that can help us reproduce the actual linking error?

Thanks,

Angus

[redengin]

IDF: * master 39f090a Merge branch 'deprecate/spi_common_claim_macros' into 'master'
toolchain: (crosstool-NG esp32-2019r1)

I tried decorating swap_byte_32 as static but that conflicts will all the non-static inline usages.

I can't provide my project, but I can look into creating an example that has the same issue.

[ESP_Angus]

Thanks redengin.

A member of our BT team was able to reproduce this as well, and a fix should be merged to master shortly.

As a workaround the error may go away if you switch Compiler Optimisation from Release back to Debug, temporarily.

[redengin]

Using `debug` compiler optimization level does the trick for now. Let me know when it'll work with `release` level.

[blueMoodBHD]

Hi all, This bug have been fixed, refer to https://github.com/espressif/esp-idf/co ... 9fa387a766

[redengin]

I can confirm that the latest updates have fixed this.