armv7 conan zlib build

zeljic@ironhills:~/dev/lizzard $ conan install --build=missing
Requirements
    zlib/1.2.8@lasote/stable
Packages
    zlib/1.2.8@lasote/stable:5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78

Installing requirements

zlib/1.2.8@lasote/stable: Installing package 5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78
zlib/1.2.8@lasote/stable: Package not installed
zlib/1.2.8@lasote/stable: Looking for package 5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78 in remotes
WARN: Unable to connect to local=http://localhost:9300
zlib/1.2.8@lasote/stable: WARN: Binary for 5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78 not in remote: All remotes failed
zlib/1.2.8@lasote/stable: Building your package in /home/zeljic/.conan/data/zlib/1.2.8/lasote/stable/build/5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78
zlib/1.2.8@lasote/stable: Copying sources to build folder
zlib/1.2.8@lasote/stable: Generated cmake created conanbuildinfo.cmake
Checking for gcc...
Compiler error reporting is too harsh for ./configure (perhaps remove -Werror).
** ./configure aborting.

zlib/1.2.8@lasote/stable: ERROR: Package '5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78' build failed
zlib/1.2.8@lasote/stable: WARN: Build folder /home/zeljic/.conan/data/zlib/1.2.8/lasote/stable/build/5111d9c5cf2ac03a5fd63ec5f9092e3da8fdbe78
ERROR: zlib: Error 256 while executing cd zlib-1.2.8 && CFLAGS=' -mstackrealign -fPIC -O3' ./configure

Hi, I confess that I don't know either what mstackrealign is, its an option specified in the official zlib docs for building.
I've found this:

Note that the -mstackrealign may cause build failures in non-Intel architeture systems.

So you are right, I've uploaded the conanfile again with the mstackrealign option only for intel architectures.
Try to remove your local zlib package with "conan remove zlib/1.2.8@lasote/stable" and install it again. (we are currently working in an update/upgrade command for these cases but its not ready yet)

Thanks for reporting it!