On 2020-07-28 11:05 a.m., H.J. Lu via Gdb-patches wrote: >> Can you clarify how this magic works, is this standard autoconf? Because I >> am trying this >> on Fedora, so pretty much the same setup as you, and I don't see this >> behavior: >> >> $ /home/simark/src/binutils-gdb/configure CC="gcc -m32" CXX="g++ -m32" >> checking build system type... x86_64-pc-linux-gnu >> checking host system type... x86_64-pc-linux-gnu >> checking target system type... x86_64-pc-linux-gnu >> ... >> > > I checked it again. I also passed i686-linux, not --host=, to configure.
Ok I see, the configure line you pasted was wrapped by your email client so was not very readable. Doing `./configure <triplet>` looks like a deprecated way to set all build/host/target, as the warning message it shows implies: configure: WARNING: you should use --build, --host, --target Anyway, my point still stands: the problem is you not using a pkg-config configured properly for the cross compilation you are attempting, not pkg.m4. >> >> And even if it worked, why would it set "build" to i686, it doesn't make >> sense. The gcc you >> compile with, and its environment, is still x86_64, not i686. >> >> So *if* it works, it would be a shortcut for setting --host=i686-something, >> maybe. So >> regardless of how that above works, that doesn't remove the need to >> configure pkg-config >> correctly for the host system. >> >> If you don't want to learn about with pkg-config and deal with it, then >> please say "I think >> we should not use pkg-config", and ideally give supporting points. Please >> don't unilaterally >> push patches just to paper over your own problems. You just make it so that >> somebody will >> need to untangle more mess later. > > I am OK to remove pkg.m4. Well I am not. I find it quite handy to avoid having to hardcode necessary CFLAGS and LDFLAGS required to build against a library, so I think it's better to use pkg-config if the libraries we want to use provide a .pc file. I propose that we revert the patch for now to go back to the pristing pkg.m4 version. Simon
