Re: [avrdude-dev] Weird errors depending on CFLAGS/CPPFLAGS/LDFLAGS

[Sven Schwermer]

Hi again,

I think the error is caused by the way the programmer ID is compared
against "xplainedmini_updi". The attached patch seems to fix the issue.
However, I don't quite understand why a programmer would need a list of
IDs in the first place, so I'd appreciate it if some sceptical eyes
looked over my patch :)

Best regards,
Sven

On 1/30/19 7:28 PM, Sven Schwermer wrote:
> Hi,
> 
> I have an Attiny817 Xplained Mini board which I want to use with
> AVRDUDE. I am using the trunk as I realize, I need commit 1417 for the
> Xplained Mini to work at all. I am using Arch Linux which is why I tried
> the avrdude-svn AUR (https://aur.archlinux.org/packages/avrdude-svn) but
> I got the following error message after building and running that:
> 
> avrdude: jtag3_edbg_recv(): Inconsistent fragment number; expect 1, got 0
> 
> When building straight from source, everything works great. I went ahead
> and verified that the makepkg tool which Arch uses to build these
> packages was in fact checking out the latest trunk. Next, I investigated
> the environment that the package was being built in. I saw the following
> interesting settings:
> 
> LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
> CPPFLAGS=-D_FORTIFY_SOURCE=2
> CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fno-plt
> 
> When unsetting all those variables right before the configure call, the
> built binary works as expected with makepkg. When not unsetting any of
> the above variables, the binary emits the aforementioned error. I also
> verified that the problem arises when I build from source without
> makepkg like so:
> 
> make distclean
> ./bootstrap
> CPPFLAGS='-D_FORTIFY_SOURCE=2' CFLAGS='-march=x86-64 -mtune=generic -O2
> -pipe -fno-plt'
> LDFLAGS='-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now' ./configure
> --sysconfdir=/etc
> make
> ./avrdude -p t817 -c xplainedmini_updi
> 
> Does anyone know how those variables can alter the build process so that
> the software doesn't work properly? I'll try to play with the values of
> the variables a little bit and I'll try attach a debugger. I'm using GCC
> 8.2.1 and GNU libc 2.28.
> 
> Best regards,
> Sven
> 
> 
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