On Wed, 12 Mar 2025 at 14:24, Daniel P. Berrangé <berra...@redhat.com> wrote: > > On Wed, Mar 12, 2025 at 02:05:09PM +0000, Daniel P. Berrangé wrote: > > On Wed, Mar 12, 2025 at 03:52:45PM +0200, Konstantin Kostiuk wrote: > > > Hi All, > > > > > > I cross-compiled qemu-ga from current master branch > > > (825b96dbcee23d134b691fc75618b59c5f53da32) and found strange behavior. > > > > > > Configure CLI: > > > ./configure --disable-docs --disable-system --disable-user > > > --cross-prefix=x86_64-w64-mingw32- --enable-guest-agent > > > --disable-guest-agent-msi --disable-qga-vss > > > Build CLI: > > > make -j8 qemu-ga > > > > > > Linker wrote the following information but exited with 0 code: > > > > > > /usr/lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld: > > > qga/qemu-ga.exe:/4: section below image base > > > /usr/lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld: > > > qga/qemu-ga.exe:/24: section below image base > > > > > > As a result, this binary failed to start on Windows without any details, > > > just a message that the application is not compatible. I also tried to run > > > it with wine and got the error: > > > > > > wine: failed to start > > > L"Z:\\home\\user\\Documents\\repos\\qemu\\build\\qga\\qemu-ga.exe" > > > Application could not be started, or no application associated with the > > > specified file. > > > ShellExecuteEx failed: Bad EXE format for > > > Z:\home\user\Documents\repos\qemu\build\qga\qemu-ga.exe. > > > > > > I bisected the tree and found the commit that caused the problem: > > > https://gitlab.com/qemu-project/qemu/-/commit/563b1a35ed1f1151505d4fe5f723827d1b3fd4bc > > > > > > Adding --disable-split-debug to the configure CLI fixes the issue. > > > > > > $ x86_64-w64-mingw32-gcc --version > > > x86_64-w64-mingw32-gcc (GCC) 14.2.0 > > > > > > My question is, is this expected behavior or is this a bug? > > > > Your configure args don't include "--enable-debug", so I would > > not have expected -gsplit-dwarf to have been enabled, so I'm > > surprised that commit casued a problem. > > Hmm it appears that the meson "get_option('debug')" is entirely > unconnected to QEMU's --enable-debug configure flag, which I did > not realize. > > IOW, we've got -gsplit-dwarf enabled by default for everyone > building QEMU, which feels dubious. IMHO only an explicit > --enable-debug configure arg should have triggered it. > > In addition since its breaking Windows builds, it appears we > need to block its usage on Windows.
Agreed, but also this seems like a bug in the Windows toolchain here: if -gsplit-dwarf is valid for Windows then it shouldn't produce bad executables, and if it's not valid then the compiler should produce an error if it's provided (or ignore it, maybe). -- PMM
