conan: What causes error message: ERROR: 'settings.arch' value not defined?

Conan 1.6.1

Hi,

We have a structure like the following (simplified):

PkgA requires PkgB PkgB requires PkgC

PkgA has no settings attribute PkgB has settings = “os”, “compiler”, “build_type”, “arch” PkgC has no settings attribute

if we run (for PkgA):

conan install PkgA-recipe -if <build dir>
conan build PkgA-recipe -bf <build dir> -sf <src folder>
conan export-pkg PkgA-recipe dev/test -bf <build dir>

we get the error ERROR: PkgB ‘settings.arch’ value not defined. The output from conan suggests that the conan export-pkg command successfully exporting the package, but failed before the package() method is called.

if we run (for PkgA): conan create PkgA-recipe dev/test

it works fine.

To stop the error for the local build we added settings = “os”, “compiler”, “build_type”, “arch” to PkgA but we don’t understand why this was required.

Any guidance on what we may have done wrong?

About this issue

Original URL
State: closed
Created 6 years ago
Comments: 17 (9 by maintainers)

Most upvoted comments

Hi, @ManuelMeraz!

See your issue, do you know you can compose profiles or even pass several of them to the same command?

Take a look at Profile includes, if your profile is defined in the file my_profile (in your local folder) it can include a default one:

include(default)
[settings]
compiler = clang
compiler.version = 6.0
compiler.libcxx = libstdc++11

and also at profile composition, you can pass several profiles to the same command:

conan install ....  -pr=default -pr=my_profile

jgsogo on Apr 24, 2019

Yes! I knew about that, but the way you just showed me in that exampled makes it very clear that it is perfect for my use case. I never thought about applying that to my specific case.

I can do what I was originally doing, I just need to include the default one and those settings will then be defined. Perfect. That is exactly what I needed 😃. Thank you.

ManuelMeraz on Apr 25, 2019

--profile options is used currently only when there is no conaninfo.txt file present in the installation directory. For example, if you run the local commands and then try to conan export-pkg, it will use the info in the conaninfo.txt.

The PR mentioned before changes that behavior to always use the profile or settings if specified.

danimtb on Oct 18, 2018