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rabbull 05-12-2020 01:57 AM
Failed to build Linux Kernel 4.15
 
I'm trying to build linux kernel 4.15 but failed, with tons of error messages. Seems not only one thing went wrong. Specific information are found below.

build platform specifications:
  • gcc: 9.3.0
  • make: 4.3
  • libelf: 0.178

build commands:
Code:
$ mkdir build
$ make O=`pwd`/build/ mrproper
$ make ARCH=x86_64 O=`pwd`/build/ x86_64_defconfig
$ make ARCH=x86_64 O=`pwd`/build/ -j`nproc`
error messages:
Code:
In file included from /usr/include/gelf.h:32,
                from arch/x86/../../elf.h:22,
                from arch/x86/decode.c:26:
/usr/include/libelf.h:46:4: error: unknown type name ‘Elf32_Word’
  46 |    Elf32_Word  ch_type;        /* Compression format.  */
      |    ^~~~~~~~~~
/usr/include/libelf.h:47:4: error: unknown type name ‘Elf32_Word’
  47 |    Elf32_Word  ch_size;        /* Uncompressed data size.  */
      |    ^~~~~~~~~~
/usr/include/libelf.h:48:4: error: unknown type name ‘Elf32_Word’
  48 |    Elf32_Word  ch_addralign;  /* Uncompressed data alignment.  */
      |    ^~~~~~~~~~
/usr/include/libelf.h:53:4: error: unknown type name ‘Elf64_Word’
  53 |    Elf64_Word  ch_type;        /* Compression format.  */
      |    ^~~~~~~~~~
/usr/include/libelf.h:54:4: error: unknown type name ‘Elf64_Word’
  54 |    Elf64_Word  ch_reserved;
      |    ^~~~~~~~~~
/usr/include/libelf.h:55:4: error: unknown type name ‘Elf64_Xword’
  55 |    Elf64_Xword  ch_size;        /* Uncompressed data size.  */
      |    ^~~~~~~~~~~
/usr/include/libelf.h:56:4: error: unknown type name ‘Elf64_Xword’
  56 |    Elf64_Xword  ch_addralign;  /* Uncompressed data alignment.  */
      |    ^~~~~~~~~~~
/usr/include/libelf.h:255:8: error: unknown type name ‘Elf32_Ehdr’
  255 | extern Elf32_Ehdr *elf32_getehdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:257:8: error: unknown type name ‘Elf64_Ehdr’
  257 | extern Elf64_Ehdr *elf64_getehdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:260:8: error: unknown type name ‘Elf32_Ehdr’
  260 | extern Elf32_Ehdr *elf32_newehdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:262:8: error: unknown type name ‘Elf64_Ehdr’
  262 | extern Elf64_Ehdr *elf64_newehdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:271:8: error: unknown type name ‘Elf32_Phdr’
  271 | extern Elf32_Phdr *elf32_getphdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:273:8: error: unknown type name ‘Elf64_Phdr’
  273 | extern Elf64_Phdr *elf64_getphdr (Elf *__elf);
      |        ^~~~~~~~~~
/usr/include/libelf.h:276:8: error: unknown type name ‘Elf32_Phdr’
  276 | extern Elf32_Phdr *elf32_newphdr (Elf *__elf, size_t __cnt);
      |        ^~~~~~~~~~
/usr/include/libelf.h:278:8: error: unknown type name ‘Elf64_Phdr’
  278 | extern Elf64_Phdr *elf64_newphdr (Elf *__elf, size_t __cnt);
      |        ^~~~~~~~~~
/usr/include/libelf.h:285:43: error: unknown type name ‘Elf32_Off’
  285 | extern Elf_Scn *elf32_offscn (Elf *__elf, Elf32_Off __offset);
      |                                          ^~~~~~~~~
/usr/include/libelf.h:287:43: error: unknown type name ‘Elf64_Off’
  287 | extern Elf_Scn *elf64_offscn (Elf *__elf, Elf64_Off __offset);
      |                                          ^~~~~~~~~
/usr/include/libelf.h:327:8: error: unknown type name ‘Elf32_Shdr’
  327 | extern Elf32_Shdr *elf32_getshdr (Elf_Scn *__scn);
      |        ^~~~~~~~~~
/usr/include/libelf.h:329:8: error: unknown type name ‘Elf64_Shdr’
  329 | extern Elf64_Shdr *elf64_getshdr (Elf_Scn *__scn);
      |        ^~~~~~~~~~
In file included from arch/x86/../../elf.h:22,
                from arch/x86/decode.c:26:
/usr/include/gelf.h:44:9: error: unknown type name ‘Elf64_Half’
  44 | typedef Elf64_Half GElf_Half;
      |        ^~~~~~~~~~
/usr/include/gelf.h:47:9: error: unknown type name ‘Elf64_Word’
  47 | typedef Elf64_Word GElf_Word;
      |        ^~~~~~~~~~
/usr/include/gelf.h:48:9: error: unknown type name ‘Elf64_Sword’
  48 | typedef Elf64_Sword GElf_Sword;
      |        ^~~~~~~~~~~
/usr/include/gelf.h:51:9: error: unknown type name ‘Elf64_Xword’
  51 | typedef Elf64_Xword GElf_Xword;
      |        ^~~~~~~~~~~
/usr/include/gelf.h:52:9: error: unknown type name ‘Elf64_Sxword’
  52 | typedef Elf64_Sxword GElf_Sxword;
      |        ^~~~~~~~~~~~
/usr/include/gelf.h:55:9: error: unknown type name ‘Elf64_Addr’
  55 | typedef Elf64_Addr GElf_Addr;
      |        ^~~~~~~~~~
/usr/include/gelf.h:58:9: error: unknown type name ‘Elf64_Off’
  58 | typedef Elf64_Off GElf_Off;
      |        ^~~~~~~~~
/usr/include/gelf.h:62:9: error: unknown type name ‘Elf64_Ehdr’
  62 | typedef Elf64_Ehdr GElf_Ehdr;
      |        ^~~~~~~~~~
/usr/include/gelf.h:65:9: error: unknown type name ‘Elf64_Shdr’
  65 | typedef Elf64_Shdr GElf_Shdr;
      |        ^~~~~~~~~~
/usr/include/gelf.h:70:9: error: unknown type name ‘Elf64_Section’
  70 | typedef Elf64_Section GElf_Section;
      |        ^~~~~~~~~~~~~
/usr/include/gelf.h:73:9: error: unknown type name ‘Elf64_Sym’
  73 | typedef Elf64_Sym GElf_Sym;
      |        ^~~~~~~~~
/usr/include/gelf.h:77:9: error: unknown type name ‘Elf64_Syminfo’
  77 | typedef Elf64_Syminfo GElf_Syminfo;
      |        ^~~~~~~~~~~~~
/usr/include/gelf.h:80:9: error: unknown type name ‘Elf64_Rel’
  80 | typedef Elf64_Rel GElf_Rel;
      |        ^~~~~~~~~
/usr/include/gelf.h:83:9: error: unknown type name ‘Elf64_Rela’
  83 | typedef Elf64_Rela GElf_Rela;
      |        ^~~~~~~~~~
/usr/include/gelf.h:86:9: error: unknown type name ‘Elf64_Phdr’
  86 | typedef Elf64_Phdr GElf_Phdr;
      |        ^~~~~~~~~~
/usr/include/gelf.h:92:9: error: unknown type name ‘Elf64_Dyn’
  92 | typedef Elf64_Dyn GElf_Dyn;
      |        ^~~~~~~~~
/usr/include/gelf.h:96:9: error: unknown type name ‘Elf64_Verdef’
  96 | typedef Elf64_Verdef GElf_Verdef;
      |        ^~~~~~~~~~~~
/usr/include/gelf.h:99:9: error: unknown type name ‘Elf64_Verdaux’
  99 | typedef Elf64_Verdaux GElf_Verdaux;
      |        ^~~~~~~~~~~~~
/usr/include/gelf.h:102:9: error: unknown type name ‘Elf64_Verneed’
  102 | typedef Elf64_Verneed GElf_Verneed;
      |        ^~~~~~~~~~~~~
/usr/include/gelf.h:105:9: error: unknown type name ‘Elf64_Vernaux’
  105 | typedef Elf64_Vernaux GElf_Vernaux;
      |        ^~~~~~~~~~~~~
/usr/include/gelf.h:109:9: error: unknown type name ‘Elf64_Versym’
  109 | typedef Elf64_Versym GElf_Versym;
      |        ^~~~~~~~~~~~
/usr/include/gelf.h:113:9: error: unknown type name ‘Elf64_auxv_t’
  113 | typedef Elf64_auxv_t GElf_auxv_t;
      |        ^~~~~~~~~~~~
/usr/include/gelf.h:117:9: error: unknown type name ‘Elf64_Nhdr’
  117 | typedef Elf64_Nhdr GElf_Nhdr;
      |        ^~~~~~~~~~
/usr/include/gelf.h:121:9: error: unknown type name ‘Elf64_Move’
  121 | typedef Elf64_Move GElf_Move;
      |        ^~~~~~~~~~
/usr/include/gelf.h:125:9: error: unknown type name ‘Elf64_Lib’
  125 | typedef Elf64_Lib GElf_Lib;
      |        ^~~~~~~~~
/usr/include/gelf.h:232:8: error: unknown type name ‘Elf32_Word’; did you mean ‘GElf_Word’?
  232 |        Elf32_Word *__xshndx);
      |        ^~~~~~~~~~
      |        GElf_Word
/usr/include/gelf.h:238:6: error: unknown type name ‘Elf32_Word’; did you mean ‘GElf_Word’?
  238 |      Elf32_Word __xshndx);
      |      ^~~~~~~~~~
      |      GElf_Word
Code:
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
  43 |  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’?
  44 |  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)
  46 |  case EM_386:
      |      ^~~~~~
In file included from arch/x86/decode.c:28:
arch/x86/decode.c:49:51: error: request for member ‘e_machine’ in something not a structure or union
  49 |  WARN("unexpected ELF machine type %d", elf->ehdr.e_machine);
      |                                                  ^
arch/x86/../../warn.h:58:14: note: in definition of macro ‘WARN’
  58 |  objname, ##__VA_ARGS__)
      |              ^~~~~~~~~~~
Code:
arch/x86/decode.c:52:1: error: control reaches end of non-void function [-Werror=return-type]
  52 | }
      | ^
Code:
pager.c: In function ‘pager_preexec’:
pager.c:36:12: error: passing argument 2 to restrict-qualified parameter aliases with argument 4 [-Werror=restrict]
  36 |  select(1, &in, NULL, &in, NULL);
      |            ^~~        ~~~

GPGAgent 05-13-2020 04:02 AM
Well, what I do is to start with the first error message and google it
Code:
libelf.h:46:4: error: unknown type name ‘Elf32_Word’
That came back with this:
https://mremallin.ca/2018/12/30/linu...lure-debian-9/
Which suggested this:
Code:
Turns out  it is my CPATH environment variable causing issues with the libelf header inclusion. Clearing the environment variable fixed the above compilation issue.
That's your starting point, just go through each error message like this always starting with the first one, clear the error and run the build again till no errors and you'll have a successful build!

rabbull 05-13-2020 04:57 AM
Quote:
Originally Posted by GPGAgent (Post 6122398)
Well, what I do is to start with the first error message and google it
Code:
libelf.h:46:4: error: unknown type name ‘Elf32_Word’
That came back with this:
https://mremallin.ca/2018/12/30/linu...lure-debian-9/
Which suggested this:
Code:
Turns out  it is my CPATH environment variable causing issues with the libelf header inclusion. Clearing the environment variable fixed the above compilation issue.
That's your starting point, just go through each error message like this always starting with the first one, clear the error and run the build again till no errors and you'll have a successful build!
Your advice is really helpful. I'm now working on it. Thanks.

ehartman 05-13-2020 07:24 AM
Quote:
Originally Posted by rabbull (Post 6122046)
I'm trying to build linux kernel 4.15 but failed, with tons of error messages.
I do wonder why you would be working on such an older (and EOL) kernel?
Kernel 4.15 had been released on 28 Jan 2018 and had its last update (4.15.18) about 3 months later on 19 Apr 2018
It was a short-term release, unlike 4.14 and 4.19, which both are still supported by the kernel team.

rabbull 05-13-2020 11:39 AM
Quote:
Originally Posted by ehartman (Post 6122451)
I do wonder why you would be working on such an older (and EOL) kernel?
Kernel 4.15 had been released on 28 Jan 2018 and had its last update (4.15.18) about 3 months later on 19 Apr 2018
It was a short-term release, unlike 4.14 and 4.19, which both are still supported by the kernel team.
Actually I didn't mean to either.

An assignment of mine requires a linux kernel module works on Deepin 15.11, which uses a fork of Kernel 4.15 by default. I'm attempting to cross-compile the module (and test on a VM later) in order to avoid installing Deepin on my laptop or coding on a VM. It turns out that I should have kernel 4.15 compiled to manage to it.

I'd appreciate any other ideas that help me out.


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