我编译前把本机的gcc降低为gcc-4.4
$ll /usr/bin/gcc*
lrwxrwxrwx 1 root root 16 4月 1 00:34 /usr/bin/gcc -> /usr/bin/gcc-4.4*


编译的出错信息如下：

CHK include/linux/version.h
CHK include/linux/utsrelease.h
SYMLINK include/asm -> include/asm-x86
HOSTCC scripts/basic/fixdep
HOSTCC scripts/basic/docproc
HOSTCC scripts/basic/hash
CC kernel/bounds.s
GEN include/linux/bounds.h
CC arch/x86/kernel/asm-offsets.s
GEN include/asm/asm-offsets.h
CALL scripts/checksyscalls.sh
HOSTCC scripts/genksyms/genksyms.o
HOSTCC scripts/genksyms/lex.o
HOSTCC scripts/genksyms/parse.o
HOSTLD scripts/genksyms/genksyms
CC scripts/mod/empty.o
HOSTCC scripts/mod/mk_elfconfig
MKELF scripts/mod/elfconfig.h
HOSTCC scripts/mod/file2alias.o
HOSTCC scripts/mod/modpost.o
scripts/mod/modpost.c: In function ‘get_markers’:
scripts/mod/modpost.c:1562: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result
scripts/mod/modpost.c: In function ‘add_marker’:
scripts/mod/modpost.c:1982: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result
HOSTCC scripts/mod/sumversion.o
HOSTLD scripts/mod/modpost
HOSTCC scripts/selinux/mdp/mdp
HOSTCC scripts/kallsyms
scripts/kallsyms.c: In function ‘read_symbol’:
scripts/kallsyms.c:112: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
HOSTCC scripts/conmakehash
CC init/main.o
ld: Relocatable linking with relocations from format elf32-i386 (init/main.o) to format elf64-x86-64 (init/.tmp_mx_main.o) is not supported
mv: cannot stat ‘init/.tmp_mx_main.o’: No such file or directory
CHK include/linux/compile.h
UPD include/linux/compile.h
CC init/version.o
CC init/do_mounts.o
ld: Relocatable linking with relocations from format elf32-i386 (init/do_mounts.o) to format elf64-x86-64 (init/.tmp_mx_do_mounts.o) is not supported
mv: cannot stat ‘init/.tmp_mx_do_mounts.o’: No such file or directory
CC init/do_mounts_rd.o
CC init/do_mounts_initrd.o
CC init/do_mounts_md.o
LD init/mounts.o
ld: Relocatable linking with relocations from format elf64-x86-64 (init/do_mounts_rd.o) to format elf32-i386 (init/mounts.o) is not supported
make[1]: *** [init/mounts.o] Error 1
make: *** [init] Error 2