ESP32 Forum

Posted: **Sun Mar 10, 2024 7:30 pm**

I'm trying to compile simple test code that I have working on ESP32 and ESP32-S3, but when I try to compile it for ESP32-C6 I get a linking error that I do not fully understand. I am able to compile the "blink" example just fine for the C6, so this is not a consistent issue with the build system.

The error looks like this (I added a couple line breaks):

Code: Select all

/home/ryan/.espressif/tools/riscv32-esp-elf/esp-13.2.0_20230928/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld:
The gap between .flash.rodata and .flash.tls must not exist to produce the final bin image.
/home/ryan/.espressif/tools/riscv32-esp-elf/esp-13.2.0_20230928/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld:
The gap between .flash.tls and .eh_frame must not exist to produce the final bin image.

I tried looking for a good explanation of "The gap between X and Y must not exist to produce the final bin image" but I could not find anything useful. Does anyone know what could be causing this error?

The CMake files are the same for the working blink example and the failing project.

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cmake_minimum_required(VERSION 3.16)
 
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(blink)

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The blink example uses `SRCS "blink_example_main.c"` instead

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idf_component_register(SRC_DIRS "nimcache"
                       INCLUDE_DIRS ".")
idf_build_set_property(C_COMPILE_OPTIONS -Wno-unused-label APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-discarded-qualifiers APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-ignored-qualifiers APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=unused-label APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=parentheses APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=implicit-function-declaration APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=maybe-uninitialized APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=nonnull APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-error=address APPEND)
idf_build_set_property(C_COMPILE_OPTIONS -Wno-unused-but-set-variable APPEND)

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Posted: **Tue Mar 12, 2024 7:40 am**

Hi!

To debug these type of linker issues, it would be easiest for us if you can provide a minimal reproducing example. Would that be possible?

Posted: **Wed Mar 13, 2024 7:28 am**

One more question: which IDF version - specifically, which commit - are you using?

Posted: **Sun Jun 23, 2024 12:35 am**

I have the same issue with my ESP32-C6-DevKitC-1

step [4/6] Linking CX executable main.elf
FAILED: main.elf

followed by ..... and then finishing with
~/.espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld: The gap between .flash.rodata and .eh_frame_hdr must not exist to produce the final bin image.

I am using idf --version => ESP-IDF v5.4-dev-1030-g0479494e7a

echo $TOOLCHAINS => org.swift.59202406131a

from export TOOLCHAINS=$(plutil -extract CFBundleIdentifier raw /Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2024-06-13-a.xctoolchain/Info.plist)

which is the latest TRUNK download from swift.org
There is a later version : swift-6.0-DEVELOPMENT-SNAPSHOT-2024-06-21-a-osx.pkg
It results in the same errors / issues.

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