Hi Helmut, > openttd fails to cross build from source for arm4, because it passes > -mbranch-protection=standard to the native build pass. This is a common > issue arising from architecture-specific build flags and commonly > happens to native build passes. The typical solution is adding > --reload-all-buildenv-variables to the debhelper invocation. I'm > attaching a patch for your convenience.
Thanks for the report and the patch. I had a look today to include it, but I am a little confused about it: > ifneq ($(TOOLS_DIR),) > - dpkg-architecture -a"$(DEB_BUILD_ARCH)" -f -c dh_auto_configure > -B"$(TOOLS_DIR)" -- -DOPTION_TOOLS_ONLY=ON > + dpkg-architecture -a"$(DEB_BUILD_ARCH)" -f -c dh_auto_configure > --reload-all-buildenv-variables -B"$(TOOLS_DIR)" -- -DOPTION_TOOLS_ONLY=ON > endif > dh_auto_configure -- $(CMAKE_CONFIG_ARGUMENTS) Your patch adds --reload-all-buildenv-variables, but it adds it to the *first* call to dh_auto_configure, not the second one. I would expect to add this to the second one (assuming the first one fills the cache and the second one uses the incorrectly cached value). Or does the option also prevent *writing* to the cache? Also, do you have a suggestion on how to reproduce this easily? I tried instructions at https://wiki.debian.org/CrossCompiling#Build_in_a_build_environment_.28recommended.29 to cross-build with git-buildpackage / git-pbuilder, but I think this just uses a full arm64 chroot with qemu instead of doing a proper split host/build arch build, and some other attempts also failed. Maybe you have some suggestion off the top of your head? Gr. Matthijs
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