On 2025-12-03 8:50 AM, Cristian Le via devel wrote:
Afaict from the logs the missing `CMAKE_SIZEOF_VOID_P` was the problem
that eventually led to not looking in `/usr/lib64`.
You clearly understand cmake better than I do. :)
Let me see if I follow what you're suggesting...
One failing case is that LDFLAGS is set by RPM, and the spec calls:
%cmake -DCMAKE_CXX_FLAGS="-Wno-deprecated-declarations"
-DCMAKE_MODULE_PATH=/usr/lib64/cmake/aws-c-common
One successful case calls the same command, but LDFLAGS is not set. In
the successful case, cmake can determine CMAKE_SIZEOF_VOID_P because g++
works, but in the failing case it can't determine the size because g++
can't create working binaries.
In both cases, the strace data shows that cmake checks
"access("/usr/aws-c-common-config.cmake")". In the failing case, just
after checking that path, cmake attempts "openat(.. "/usr/lib/cmake"..)
and then does not check for the file under the CMAKE_MODULE_PATH
specified on the command line, which was /usr/lib64/cmake/aws-c-common.
But in the successful case, cmake attempts "openat(..
"/usr/lib64/cmake"..)" and then checks the prefix specified on the
command line.
Is it reasonable to conclude that cmake is normalizing the path given on
the command line from /usr/lib64/cmake/aws-c-common to
/usr/lib64/cmake/aws-c-common for some reason (possibly because it can't
determine the sizeof void*)? I can't think of another reason why it
would not check the path given as a command line argument.
I don't see where or why it might normalize the path, but again, I don't
know a whole lot about cmake.
--
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