作为linux内核编译的新手，这是我第一次自己编译Linux内核（我正在尝试使用其他TCP拥塞控制算法）。
我按照以下步骤操作如何编译 Linux 内核。当尝试运行时make，我收到错误：
✘ XPS-13-9360 ~/linux_compile/linux-5.1.18 make
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
DESCEND objtool
CC /home/soar/linux_compile/linux-5.1.18/tools/objtool/arch/x86/decode.o
In file included from /usr/include/gelf.h:32:0,
from arch/x86/../../elf.h:22,
from arch/x86/decode.c:26:
/usr/include/libelf.h:46:4: error: unknown type name ‘Elf32_Word’
Elf32_Word ch_type; /* Compression format. */
^~~~~~~~~~
/usr/include/libelf.h:47:4: error: unknown type name ‘Elf32_Word’
Elf32_Word ch_size; /* Uncompressed data size. */
^~~~~~~~~~
/usr/include/libelf.h:48:4: error: unknown type name ‘Elf32_Word’
Elf32_Word ch_addralign; /* Uncompressed data alignment. */
^~~~~~~~~~
/usr/include/libelf.h:53:4: error: unknown type name ‘Elf64_Word’
Elf64_Word ch_type; /* Compression format. */
^~~~~~~~~~
/usr/include/libelf.h:54:4: error: unknown type name ‘Elf64_Word’
Elf64_Word ch_reserved;
^~~~~~~~~~
/usr/include/libelf.h:55:4: error: unknown type name ‘Elf64_Xword’
Elf64_Xword ch_size; /* Uncompressed data size. */
^~~~~~~~~~~
/usr/include/libelf.h:56:4: error: unknown type name ‘Elf64_Xword’
Elf64_Xword ch_addralign; /* Uncompressed data alignment. */
^~~~~~~~~~~
/usr/include/libelf.h:253:8: error: unknown type name ‘Elf32_Ehdr’
extern Elf32_Ehdr *elf32_getehdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:255:8: error: unknown type name ‘Elf64_Ehdr’
extern Elf64_Ehdr *elf64_getehdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:258:8: error: unknown type name ‘Elf32_Ehdr’
extern Elf32_Ehdr *elf32_newehdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:260:8: error: unknown type name ‘Elf64_Ehdr’
extern Elf64_Ehdr *elf64_newehdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:269:8: error: unknown type name ‘Elf32_Phdr’
extern Elf32_Phdr *elf32_getphdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:271:8: error: unknown type name ‘Elf64_Phdr’
extern Elf64_Phdr *elf64_getphdr (Elf *__elf);
^~~~~~~~~~
/usr/include/libelf.h:274:8: error: unknown type name ‘Elf32_Phdr’
extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt);
^~~~~~~~~~
/usr/include/libelf.h:276:8: error: unknown type name ‘Elf64_Phdr’
extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt);
^~~~~~~~~~
/usr/include/libelf.h:283:43: error: unknown type name ‘Elf32_Off’; did you mean ‘Elf32_Chdr’?
extern Elf_Scn *elf32_offscn (Elf *__elf, Elf32_Off __offset);
^~~~~~~~~
Elf32_Chdr
/usr/include/libelf.h:285:43: error: unknown type name ‘Elf64_Off’; did you mean ‘Elf64_Chdr’?
extern Elf_Scn *elf64_offscn (Elf *__elf, Elf64_Off __offset);
^~~~~~~~~
Elf64_Chdr
/usr/include/libelf.h:325:8: error: unknown type name ‘Elf32_Shdr’
extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn);
^~~~~~~~~~
/usr/include/libelf.h:327:8: error: unknown type name ‘Elf64_Shdr’
extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn);
^~~~~~~~~~
In file included from arch/x86/../../elf.h:22:0,
from arch/x86/decode.c:26:
/usr/include/gelf.h:44:9: error: unknown type name ‘Elf64_Half’
typedef Elf64_Half GElf_Half;
^~~~~~~~~~
/usr/include/gelf.h:47:9: error: unknown type name ‘Elf64_Word’
typedef Elf64_Word GElf_Word;
^~~~~~~~~~
/usr/include/gelf.h:48:9: error: unknown type name ‘Elf64_Sword’
typedef Elf64_Sword GElf_Sword;
^~~~~~~~~~~
/usr/include/gelf.h:51:9: error: unknown type name ‘Elf64_Xword’
typedef Elf64_Xword GElf_Xword;
^~~~~~~~~~~
/usr/include/gelf.h:52:9: error: unknown type name ‘Elf64_Sxword’
typedef Elf64_Sxword GElf_Sxword;
^~~~~~~~~~~~
/usr/include/gelf.h:55:9: error: unknown type name ‘Elf64_Addr’
typedef Elf64_Addr GElf_Addr;
^~~~~~~~~~
/usr/include/gelf.h:58:9: error: unknown type name ‘Elf64_Off’
typedef Elf64_Off GElf_Off;
^~~~~~~~~
/usr/include/gelf.h:62:9: error: unknown type name ‘Elf64_Ehdr’
typedef Elf64_Ehdr GElf_Ehdr;
^~~~~~~~~~
/usr/include/gelf.h:65:9: error: unknown type name ‘Elf64_Shdr’
typedef Elf64_Shdr GElf_Shdr;
^~~~~~~~~~
/usr/include/gelf.h:70:9: error: unknown type name ‘Elf64_Section’
typedef Elf64_Section GElf_Section;
^~~~~~~~~~~~~
/usr/include/gelf.h:73:9: error: unknown type name ‘Elf64_Sym’
typedef Elf64_Sym GElf_Sym;
^~~~~~~~~
/usr/include/gelf.h:77:9: error: unknown type name ‘Elf64_Syminfo’
typedef Elf64_Syminfo GElf_Syminfo;
^~~~~~~~~~~~~
/usr/include/gelf.h:80:9: error: unknown type name ‘Elf64_Rel’
typedef Elf64_Rel GElf_Rel;
^~~~~~~~~
/usr/include/gelf.h:83:9: error: unknown type name ‘Elf64_Rela’
typedef Elf64_Rela GElf_Rela;
^~~~~~~~~~
/usr/include/gelf.h:86:9: error: unknown type name ‘Elf64_Phdr’
typedef Elf64_Phdr GElf_Phdr;
^~~~~~~~~~
/usr/include/gelf.h:92:9: error: unknown type name ‘Elf64_Dyn’
typedef Elf64_Dyn GElf_Dyn;
^~~~~~~~~
/usr/include/gelf.h:96:9: error: unknown type name ‘Elf64_Verdef’
typedef Elf64_Verdef GElf_Verdef;
^~~~~~~~~~~~
/usr/include/gelf.h:99:9: error: unknown type name ‘Elf64_Verdaux’
typedef Elf64_Verdaux GElf_Verdaux;
^~~~~~~~~~~~~
/usr/include/gelf.h:102:9: error: unknown type name ‘Elf64_Verneed’
typedef Elf64_Verneed GElf_Verneed;
^~~~~~~~~~~~~
/usr/include/gelf.h:105:9: error: unknown type name ‘Elf64_Vernaux’
typedef Elf64_Vernaux GElf_Vernaux;
^~~~~~~~~~~~~
/usr/include/gelf.h:109:9: error: unknown type name ‘Elf64_Versym’
typedef Elf64_Versym GElf_Versym;
^~~~~~~~~~~~
/usr/include/gelf.h:113:9: error: unknown type name ‘Elf64_auxv_t’
typedef Elf64_auxv_t GElf_auxv_t;
^~~~~~~~~~~~
/usr/include/gelf.h:117:9: error: unknown type name ‘Elf64_Nhdr’
typedef Elf64_Nhdr GElf_Nhdr;
^~~~~~~~~~
/usr/include/gelf.h:121:9: error: unknown type name ‘Elf64_Move’
typedef Elf64_Move GElf_Move;
^~~~~~~~~~
/usr/include/gelf.h:125:9: error: unknown type name ‘Elf64_Lib’
typedef Elf64_Lib GElf_Lib;
^~~~~~~~~
/usr/include/gelf.h:232:8: error: unknown type name ‘Elf32_Word’; did you mean ‘GElf_Word’?
Elf32_Word *__xshndx);
^~~~~~~~~~
GElf_Word
/usr/include/gelf.h:238:6: error: unknown type name ‘Elf32_Word’; did you mean ‘GElf_Word’?
Elf32_Word __xshndx);
^~~~~~~~~~
GElf_Word
arch/x86/decode.c: In function ‘is_x86_64’:
arch/x86/decode.c:43:19: error: request for member ‘e_machine’ in something not a structure or union
switch (elf->ehdr.e_machine) {
^
arch/x86/decode.c:44:7: error: ‘EM_X86_64’ undeclared (first use in this function); did you mean ‘is_x86_64’?
case EM_X86_64:
^~~~~~~~~
is_x86_64
arch/x86/decode.c:44:7: note: each undeclared identifier is reported only once for each function it appears in
arch/x86/decode.c:46:7: error: ‘EM_386’ undeclared (first use in this function); did you mean ‘EM_X86_64’?
case EM_386:
^~~~~~
EM_X86_64
In file included from arch/x86/decode.c:28:0:
arch/x86/decode.c:49:51: error: request for member ‘e_machine’ in something not a structure or union
WARN("unexpected ELF machine type %d", elf->ehdr.e_machine);
^
arch/x86/../../warn.h:58:14: note: in definition of macro ‘WARN’
objname, ##__VA_ARGS__)
^~~~~~~~~~~
arch/x86/decode.c:52:1: error: control reaches end of non-void function [-Werror=return-type]
}
^
cc1: all warnings being treated as errors
mv: cannot stat '/home/soar/linux_compile/linux-5.1.18/tools/objtool/arch/x86/.decode.o.tmp': No such file or directory
/home/soar/linux_compile/linux-5.1.18/tools/build/Makefile.build:96: recipe for target '/home/soar/linux_compile/linux-5.1.18/tools/objtool/arch/x86/decode.o' failed
make[4]: *** [/home/soar/linux_compile/linux-5.1.18/tools/objtool/arch/x86/decode.o] Error 1
/home/soar/linux_compile/linux-5.1.18/tools/build/Makefile.build:139: recipe for target 'arch/x86' failed
make[3]: *** [arch/x86] Error 2
Makefile:50: recipe for target '/home/soar/linux_compile/linux-5.1.18/tools/objtool/objtool-in.o' failed
make[2]: *** [/home/soar/linux_compile/linux-5.1.18/tools/objtool/objtool-in.o] Error 2
Makefile:66: recipe for target 'objtool' failed
make[1]: *** [objtool] Error 2
Makefile:1699: recipe for target 'tools/objtool' failed
make: *** [tools/objtool] Error 2
在 libelf.h 中：
和 elf.h
然后我发现之前有报道过，但仍然没有任何解决办法。我能做些什么？
答案1
其实这个是我自己想出来的。看起来编译器找不到我认为的标头。使用env命令，CPATH不在/usr/include/but中/home/user/.local/include:$CPATH，所以我将CPATH更改为/usr/include/，使用的方法克雷默，但是还是不行，env显示CPATH已经是/usr/include/.我想解决这个问题会很困难，关闭我的ubuntu休息一下。但今天早上我打开我的ubuntu，一切正常。