Esp-idf: [TW#14359] missing dll during make flash

[notsirius]

I followed the latest instructions regarding installing on Windows machine. I get the following error when I execute the make flash command.

GENCONFIG
CC src/bootloader_random.o
CC src/flash_encrypt.o
CC src/bootloader_sha.o
CC src/esp_image_format.o
CC src/flash_partitions.o
CC src/secure_boot_signatures.o
CC src/secure_boot.o
CC src/efuse.o
CC src/bootloader_flash.o
AR libbootloader_support.a
C:\msys32\opt\xtensa-esp32-elf\bin\xtensa-esp32-elf-gcc-ar.exe: Cannot find plugin 'liblto_plugin-0.dll'
make[2]: * [/home/pwl/esp/esp-idf/make/component_wrapper.mk:169: libbootloader_support.a] Error 1
make[1]: [/home/pwl/esp/esp-idf/make/project.mk:391: component-bootloader_support-build] Error 2
make: ** [/home/pwl/esp/esp-idf/components/bootloader/Makefile.projbuild:39: /home/pwl/esp/blink/build/bootloader/bootloader.bin] Error 2

[krzychb]

Is ThomasB == NotSirius?
https://www.esp32.com/viewtopic.php?f=14&t=2500
Or there are two separate cases?

Logs look similar except the other one is in German.

[notsirius]

Separate cases. Very similar issue though. I'm also working with Windows 10.

[Spritetm]

Fwiw, we've been modifying the bootloader a few days ago. Because it got too big when all the options were enabled, we now compile it with load-time optimization. My guess would be that the Windows-build of the toolchain somehow is missing support for that.

[notsirius]

Copying the missing dll from a fresh install of MinGW (C:\MinGW\libexec\gcc\mingw32\5.3.0) to the folder C:\msys32\opt\xtensa-esp32-elf\libexec\gcc\xtensa-esp32-elf\5.2.0 seems to fix the problem. I am able to flash the hello_world and blink examples now.

[ESP32DE]

@NotSirius
confirm - same here.

btw:

LX106 has liblto_plugin-0.dll too - so can you say - which version o fliblto_plugin-0.dll you cpy?
arduino IDE has a liblto_plugin-0.dll.a file

[ESP32DE]

@NotSirius

Copying the missing dll from a fresh install of MinGW (C:\MinGW\libexec\gcc\mingw32\5.3.0) to the folder C:\msys32\opt\xtensa-esp32-elf\libexec\gcc\xtensa-esp32-elf\5.2.0 seems to fix the problem. I am able to flash the hello_world and blink examples now.

confirm - the compile runs but
can you check your console log too?
did you not get moretimes

c:\msys32\opt\xtensa-esp32-elf\bin\../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ar.exe: Unable to load DLL.

:)

[notsirius]

@ESP32DE, the file from the Arduino installation seems to work fine too. I didn't realize the file was available from the Arduino folders, so I installed the latest version of mingw (http://www.mingw.org) and copied the file from there.

[ESP32DE]

@NotSirius
how looks your compile log?
it compiles but there is "unable to load DLL" too.

[notsirius]

No compiler errors - see attachment.
CompileLog.txt

[ESP32DE]

delete the build folder
and compile only by
make all

your log is very short :)
here is the my

console_eclipse_part.txt

[ESP32DE]

@NotSirius
ok, after few different version testings,

i found my right dll for win7

i take it from one of my installed mingw versions

and now i have no "unable to load DLL"
thanks! - this solved temporary the problem until there comes an update on
Windows-build of the toolchain.

[lucazader]

I have also found the v3.0 branch is not building on windows 10 (using the current msys32 pre compiled toolchain)
Currently working from release/2.1.
However have seen a few commits in the 3.0 branch that would fix an issue or two that i have encountered. Would be good to get this working again.

Also would be great if we could turn on LTO in the menuconfig for normal applications, but i suppose that is a separate issue.

[rbenea]

The files liblto_plugin.dll.a and liblto_plugin-0.dll can be found in this official archive: https://sourceforge.net/projects/mingw/files/MinGW/Base/gcc/Version5/gcc-5.3.0-3/gcc-core-5.3.0-3-mingw32-bin.tar.xz/download . You can use 7-Zip to open the archive.

You need to extract the files and put them in C:\MinGw\libexec\gcc\mingw32\5.3.0 folder (edit the path for your install) and restarted Arduino IDE just to be sure.

[krzychb]

The files liblto_plugin.dll.a and liblto_plugin-0.dll can be found in this official archive: https://sourceforge.net/projects/mingw/files/MinGW/Base/gcc/Version5/gcc-5.3.0-3/gcc-core-5.3.0-3-mingw32-bin.tar.xz/download .

Hi @rbenea,

Thank you for this direct link.

On my installation I copied both liblto_plugin.dll.a and liblto_plugin-0.dll to
C:\msys32\opt\xtensa-esp32-elf\libexec\gcc\xtensa-esp32-elf\5.2.0 folder.

That resolved this issue.

[jimibi]

Resolved for me too on Windows 7

[CaptainNormal]

Exactly as posted by @krzychb resolved the issue for me.

[igrr]

Resolved in https://github.com/espressif/esp-idf/commit/938085e749c88ded9ada3e5356205b407c832357.