Thanks for reporting! Seems like others ran into this problem, too - a patch is already on the list: https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg08967.html
** Changed in: qemu Status: New => Confirmed -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1886343 Title: configure has non-posix bash syntax Status in QEMU: Confirmed Bug description: which gives an error when run on a system that uses dash for /bin/sh. The problem is at line 6464 which has if test "$have_keyring" == "yes" the double equal sign is non-posix bash syntax that isn't accepted by posix shells like dash. This was added 2020-05-25 according to git blame so looks like a recent problem. On an Ubuntu 20.04 system with top of tree sources I get gondor:2027$ ../qemu/configure --prefix=/home/wilson/FOSS/qemu/install-qemu-tmp --target-list=riscv64-linux-user,riscv64-softmmu,riscv32-linux-user,riscv32-softmmu ../qemu/configure: 6464: test: yes: unexpected operator ... configure completes OK, so this is a minor problem. It is just one configure test that is failing to work properly. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1886343/+subscriptions