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ESP32 C6 mini compile does not work
Posted: Tue Jul 08, 2025 2:55 pm
by stefan.erni
Hi to All
I have a small problem with ESP32 C6 mini.
Compile to target does not work.
Program and txt:
Re: ESP32 C6 mini compile does not work
Posted: Tue Jul 08, 2025 5:00 pm
by mnfisher
That compiled AOK for me after I set the pin for the LED to a different value (it seemed to be set as unconnected - although it also looked like maybe GPIO23. Setting it to GPIO23 was okay)
I am also using 5.3.2 which might make a difference?
Martin
Re: ESP32 C6 mini compile does not work
Posted: Wed Jul 09, 2025 9:38 am
by stefan.erni
Hi Martin
I have turned on the LED but still no compiling possible.
I will try on another computer with 5.3.2
=============================================================================
Python 3.7.3
git version 2.21.0.windows.1
ESP toolchain found at "C:\Users\Desktop\esp-idf-2\"
Building: ESP32_C6_post ...
IDF Version: v5.0.6 ...
Re: ESP32 C6 mini compile does not work
Posted: Thu Jul 10, 2025 1:50 pm
by stefan.erni
Hi Martin
On the second computer it's not working even 5.2 and no Led
What about GIT?
Re: ESP32 C6 mini compile does not work
Posted: Thu Jul 10, 2025 2:14 pm
by mnfisher
It's odd - then the only thing I am doing different is using a separate directory for each project.
One option is to try a full clean of the directory - as the Flowcode build leaves the majority of files pre-compiled (and if you previously used a different chip?)
So in a command prompt 'cd' to the project directory - then use:
C:\Espressif\frameworks\esp-idf-v5.3.2\export // Adjust the path according to your install
idf.py fullclean
idf.py build
Then try building from within FC again.
Martin
Re: ESP32 C6 mini compile does not work
Posted: Fri Jul 11, 2025 9:11 am
by stefan.erni
Hi Martin
I have tested with a simple program if I can compile to hex.
On both computers the C6 does not work
Not compiling to hex on both computer
Not compiling to hex on one computer, but compiling on the other it's ok
Compiling nice to hex on both computer 
Re: ESP32 C6 mini compile does not work
Posted: Wed Mar 04, 2026 3:19 pm
by stefan.erni
Hi Ben
The ESP32-C3 works well.
I am still unable to compile to hex with the ESP32-C6 on any computer.
Re: ESP32 C6 mini compile does not work
Posted: Thu Apr 02, 2026 1:24 pm
by stefan.erni
Hi Ben
The ESP32 and ESP32S3 work, but the ESP32C3 and ESP32C6 don't. What should I do?
Code: Select all
-- Found Git: C:/FC_ESP/esp-tools/tools/idf-git/2.44.0/bin/git.exe (found version "2.44.0.windows.1")
-- git rev-parse returned 'fatal: not a git repository (or any of the parent directories): .git'
fatal: not a git repository (or any of the parent directories): .git
-- ccache will be used for faster recompilation
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
-- The ASM compiler identification is GNU
-- Found assembler: C:/FC_ESP/esp-tools/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/riscv32-esp-elf-gcc.exe
-- Detecting C compiler ABI info
.
-- Detecting C compiler ABI info - failed
-- Check for working C compiler: C:/FC_ESP/esp-tools/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/riscv32-esp-elf-gcc.exe
-- Check for working C compiler: C:/FC_ESP/esp-tools/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/riscv32-esp-elf-gcc.exe - broken
CMake Error at C:/FC_ESP/esp-tools/tools/cmake/3.24.0/share/cmake-3.24/Modules/CMakeTestCCompiler.cmake:69 (message):
The C compiler
"C:/FC_ESP/esp-tools/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/riscv32-esp-elf-gcc.exe"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: C:/FC_ESP/mtxesp32_c3_sdkconfig/build/CMakeFiles/CMakeTmp
Run Build Command(s):C:/FC_ESP/esp-tools/tools/ninja/1.11.1/ninja.exe cmTC_8d095 && [1/2] Building C object CMakeFiles\cmTC_8d095.dir\testCCompiler.c.obj
FAILED: CMakeFiles/cmTC_8d095.dir/testCCompiler.c.obj
C:\FC_ESP\esp-tools\tools\riscv32-esp-elf\esp-13.2.0_20240530\riscv32-esp-elf\bin\riscv32-esp-elf-gcc.exe -march=rv32imc_zicsr_zifencei -o CMakeFiles\cmTC_8d095.dir\testCCompiler.c.obj -c C:\FC_ESP\mtxesp32_c3_sdkconfig\build\CMakeFiles\CMakeTmp\testCCompiler.c
riscv32-esp-elf-gcc.exe: fatal error: cannot execute 'as': CreateProcess: No such file or directory
compilation terminated.
ninja: build stopped: subcommand failed.
Re: ESP32 C6 mini compile does not work
Posted: Thu Apr 02, 2026 4:33 pm
by jgu1
Hi Stefan!
I also can't compile your program and none of the C models eitther. I also use esp-idf-v5.3.1 like you do. I was told by Martitn (Medelec) a long time ago that esp-idf-v5.3.1 can't be used for the C models he told me, as far as I remember he said it should be esp-idf-v5.1 You can try searching here in the forum
unless something was updated in 5.3.1 Meanwhile I see that Martin use V.5.3,2 newer, what do you say Martin "mnfisher"?
Br Jorgen
Re: ESP32 C6 mini compile does not work
Posted: Tue Apr 14, 2026 12:13 am
by grout1
Any progress on the c6 compiler issues yet?