python-kadmin fails to build with gcc 10: gcc -pthread -shared -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -g -Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o build/temp.linux-x86_64-3.9/src/PyKAdminErrors.o build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o build/temp.linux-x86_64-3.9/src/PyKAdminObject.o build/temp.linux-x86_64-3.9/src/PyKAdminPolicyObject.o build/temp.linux-x86_64-3.9/src/PyKAdminPrincipalObject.o build/temp.linux-x86_64-3.9/src/PyKAdminXDR.o build/temp.linux-x86_64-3.9/src/getdate.o build/temp.linux-x86_64-3.9/src/kadmin.o -L/usr/lib64 -lkrb5 -lkadm5clnt -lkdb5 -o build/lib.linux-x86_64-3.9/kadmin.cpython-39-x86_64-linux-gnu.so /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: multiple definition of `PyKAdminObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: multiple definition of `PyKAdminObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: multiple definition of `PyKAdminPolicyObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: multiple definition of `PyKAdminPrincipalObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: multiple definition of `PyKAdminIterator_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPolicyObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: multiple definition of `PyKAdminPolicyObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPolicyObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: multiple definition of `PyKAdminPrincipalObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPolicyObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: multiple definition of `PyKAdminIterator_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPolicyObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: multiple definition of `PyKAdminObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPrincipalObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: multiple definition of `PyKAdminPolicyObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPrincipalObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: multiple definition of `PyKAdminPrincipalObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPrincipalObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: multiple definition of `PyKAdminIterator_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/PyKAdminPrincipalObject.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: multiple definition of `PyKAdminObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/kadmin.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: multiple definition of `PyKAdminObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminCommon.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminObject.h:34: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/kadmin.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: multiple definition of `PyKAdminPrincipalObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPrincipalObject.h:24: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/kadmin.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: multiple definition of `PyKAdminPolicyObject_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminPolicyObject.h:23: first defined here /usr/bin/ld: build/temp.linux-x86_64-3.9/src/kadmin.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: multiple definition of `PyKAdminIterator_Type'; build/temp.linux-x86_64-3.9/src/PyKAdminIterator.o:/builddir/build/BUILD/python-kadmin-94e50ed0a788d9ff9e4b47a35a65ca22c69b703a/src/PyKAdminIterator.h:24: first defined here collect2: error: ld returned 1 exit status This blocks the Python 3.9 rebuild of the package. See https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/RYVPP45PMWPXYBBDKXO3CI7YGL7CDQG6/ and https://gcc.gnu.org/gcc-10/porting_to.html#common for more information about the failure.