> -----Original Message----- > From: xen-devel-boun...@lists.xen.org [mailto:xen-devel- > boun...@lists.xen.org] On Behalf Of Ian Murray > Sent: 15 March 2015 22:59 > To: xen-de...@lists.xensource.com > Subject: [Xen-devel] Compliling Xen 4.5.0 Fails with error: ‘bufioreq_pfn’ may > be used uninitialised in this function [-Werror=uninitialized] > > Hi, > > This was originally posted to the user list but it was suggested to me to > post it > here also. I am getting a failed compilation when I try to compile Xen 4.5.0 > from the tarball and also from Git. I can compile RC4, although a bisect > reveals that they pertinent difference is debug=y in Config.mk, which allows > it to compile. That compiles without a problem and that is what I am running > with. I have tried to build on two different servers with the same result, > however both are running Ubuntu 12.04.5 and are similarly configured. > > Steps I (would) use to build are simply... > > ./configure > make dist > make install > > > which results in... > > ... > gcc -O2 -fomit-frame-pointer -m64 -fno-strict-aliasing -std=gnu99 -Wall > -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set- > variable > -DNDEBUG -I/root/xen450/xen-4.5.0/xen/include > -I/root/xen450/xen-4.5.0/xen/include/asm-x86/mach-generic > -I/root/xen450/xen-4.5.0/xen/include/asm-x86/mach-default -msoft-float > -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX > -DHAVE_GAS_EPT -DHAVE_GAS_FSGSBASE -mno-red-zone -mno-sse -fpic > -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -fno- > builtin > -fno-common -Werror -Wredundant-decls -Wno-pointer-arith -pipe -g - > D__XEN__ > -include /root/xen450/xen-4.5.0/xen/include/xen/config.h -nostdinc - > DHAS_ACPI > -DHAS_GDBSX -DHAS_PASSTHROUGH -DHAS_MEM_ACCESS - > DHAS_MEM_PAGING > -DHAS_MEM_SHARING -DHAS_PCI -DHAS_IOPORTS -DHAS_PDX -MMD -MF > .hvm.o.d -c hvm.c > -o hvm.o > hvm.c: In function ‘hvm_create_ioreq_server’: > hvm.c:487:18: error: ‘bufioreq_pfn’ may be used uninitialised in this function > [-Werror=uninitialized] > hvm.c:718:30: note: ‘bufioreq_pfn’ was declared here > cc1: all warnings being treated as errors > make[5]: *** [hvm.o] Error 1 > > Any suggestions are welcome, >
Those line numbers don't work for me. I did a checkout of RELEASE-4.5.0 and, whilst bufioreq_pfn is indeed declared on line 718, I see no reference to it on line 487. Also, if I compile debug=n I see no problem. Is it possible you don't have a clean checkout of 4.5.0? What version of gcc are you using? Paul > Thanks for reading, > > Ian. > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
