未定义的符号'timer_settime @@ GLIBC_2.3.3

Question

操作系统:Linux

我试图链接mips64-softmmu/qemu-system-mips64但它导致错误:

./slirp/misc.o: In function `memset':
/usr/include/bits/string3.h:81: warning: memset used with constant zero length parameter; 
this could be due to transposed parameters
/usr/bin/ld: ../qemu-timer.o: undefined reference to symbol 'timer_settime@@GLIBC_2.3.3'
/usr/bin/ld: note: 'timer_settime@@GLIBC_2.3.3' is defined in DSO /lib64/librt.so.1 so   try adding it to the linker command line

/lib64/librt.so.1: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make[1]: *** [qemu-system-mips64] Error 1
make: *** [subdir-mips64-softmmu] Error 2

任何人都可以建议我如何解决这个问题.

Answer 1

出现此问题的原因是rt库未链接.

在qemu目录中编辑Makefile.target,查找LIBS+=-lz,添加LIBS+=-lrt到此行下方.

或者说,在本地添加了以下补丁

--- a/tools/qemu-xen/Makefile.target    2013-04-05 23:39:54.000000000 +0000
+++ b/tools/qemu-xen/Makefile.target    2013-04-25 13:54:59.360000000 +0000
@@ -206,6 +206,7 @@
obj-$(CONFIG_NO_KVM) += kvm-stub.o
obj-y += memory.o
LIBS+=-lz
+LIBS+=-lrt

QEMU_CFLAGS += $(VNC_TLS_CFLAGS)
QEMU_CFLAGS += $(VNC_SASL_CFLAGS)

Answer 2

Makefile通过编辑两个文件并Makefile.target添加来解决问题

LIBS+=-lz -lrt -lm