We currently build CONFIG_IPV6=m.
This seems to be not really well-supported in mainline kernels - see
https://lore.kernel.org/netdev/20201115224509.2020651-1-flokli@flokli.de/T/#u
Compiling it as a module doesn't give too much benefit - even for people
who did explicitly set `enableIPv6` to false, the `ipv6` module was
still loaded, as soon as another module was loaded that requires it
(bridge,br_netfilter,wireguard,ip6table_mangle,sctp,…).
By compiling it in, we only loose the possibility to not add it to
`boot.kernelModules` anymore (as it's part of the kernel directly). The
space savings are negligible.
People wanting to disable IPv6 still get the appropriate sysctls and
options set (while having the kernel code loaded), nothing is really
changing here.
Patch copied from https://github.com/archlinux/svntogit-packages/blob/packages/wireguard-dkms/trunk/lts.diff
This fixes:
```
In file included from <command-line>:
/build/source/src/compat/compat-asm.h:44: warning: "SYM_FUNC_START" redefined
44 | #define SYM_FUNC_START ENTRY
|
In file included from /build/source/src/compat/compat-asm.h:9,
from <command-line>:
/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/include/linux/linkage.h:218: note: this is the location of the previous definition
218 | #define SYM_FUNC_START(name) \
|
In file included from <command-line>:
/build/source/src/compat/compat-asm.h:45: warning: "SYM_FUNC_END" redefined
45 | #define SYM_FUNC_END ENDPROC
|
In file included from /build/source/src/compat/compat-asm.h:9,
from <command-line>:
/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/include/linux/linkage.h:265: note: this is the location of the previous definition
265 | #define SYM_FUNC_END(name) \
|
/build/source/src/crypto/zinc/blake2s/blake2s-x86_64.S: Assembler messages:
/build/source/src/crypto/zinc/blake2s/blake2s-x86_64.S:50: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/blake2s/blake2s-x86_64.S:176: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/blake2s/blake2s-x86_64.S:180: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/blake2s/blake2s-x86_64.S:257: Error: invalid character '(' in mnemonic
make[3]: *** [/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/scripts/Makefile.build:348: /build/source/src/crypto/zinc/blake2s/blake2s-x86_64.o] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from <command-line>:
/build/source/src/compat/compat-asm.h:44: warning: "SYM_FUNC_START" redefined
44 | #define SYM_FUNC_START ENTRY
|
In file included from /build/source/src/compat/compat-asm.h:9,
from <command-line>:
/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/include/linux/linkage.h:218: note: this is the location of the previous definition
218 | #define SYM_FUNC_START(name) \
|
In file included from <command-line>:
/build/source/src/compat/compat-asm.h:45: warning: "SYM_FUNC_END" redefined
45 | #define SYM_FUNC_END ENDPROC
|
In file included from /build/source/src/compat/compat-asm.h:9,
from <command-line>:
/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/include/linux/linkage.h:265: note: this is the location of the previous definition
265 | #define SYM_FUNC_END(name) \
|
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S: Assembler messages:
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:123: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:185: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:187: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:319: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1016: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1616: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1620: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1810: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1812: Error: invalid character '(' in mnemonic
/build/source/src/crypto/zinc/chacha20/chacha20-x86_64.S:1959: Error: invalid character '(' in mnemonic
make[3]: *** [/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/scripts/Makefile.build:348: /build/source/src/crypto/zinc/chacha20/chacha20-x86_64.o] Error 1
make[2]: *** [/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/Makefile:1729: /build/source/src] Error 2
make[1]: *** [/nix/store/cz60577g5hwk78c2z7rhxl21bklaqr0d-linux-5.4.77-dev/lib/modules/5.4.77-hardened/source/Makefile:179: sub-make] Error 2
make: *** [Makefile:26: module] Error 2
builder for '/nix/store/hll3sjyrwa55arzlsxnbacqdd8s842l1-wireguard-1.0.20200908.drv' failed with exit code 2
```
sudo the package is not suid, so remove it from the PATH. Extend
PATH with $PATH to fetch sudo from the outer PATH. Move the generation
of `path` in to Nix, so the sed expression can use single quotes,
which prevents $PATH being interpolated at build-time.
