Switch Nixpkgs to using more NetBSD stuff for MUSL #41320

matthewbauer · 2018-05-31T16:36:05Z

Motivation for this change

This gets rid of some of the Musl specific stuff that was being pulled indirectly from NetBSD sources. Libbsd is also replaced with NetBSD compat. More testing is still needed.

This gets our BSD derivations directly from the upstream NetBSD CVS tree. Previously we were relying on "Linux"ized derivations of BSD sources (slightly modified versions of the original BSD sources). There are basically two things this changes:

Replace libbsd with NetBSD compat. The Freedesktop project maintains libbsd but they only support it on Linux platforms. libbsd works great for Linux but unfortunately lacks feature detection & requires heavy patching for macOS or really anything else that's not GNU/Linux. NetBSD compat does proper feature detection so should work almost anywhere. (https://github.com/NetBSD/src/tree/trunk/tools/compat)
Replace musl-* stuff with direct NetBSD derivation. These are all derived from NetBSD sources originally but we were relying on Alpine Linux's version of them. Moving to upstream should be more reliable.

GrahamcOfBorg · 2018-05-31T17:33:23Z

Success on x86_64-linux (full log)

Attempted: libbsd

Partial log (click to expand)

--- /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2/include/compat/nbtool_config.h ---
#   install  /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2/include/compat/nbtool_config.h
/nix/store/7ks9bl96a1793lxjk9vyxyf80a5m6a5f-coreutils-8.29/bin/install -c  -D nbtool_config.h /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2/include/compat/nbtool_config.h
--- includes ---
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2
strip is /nix/store/92d2ifxcni4n3zx9s8wnkcjlvnx5ajlc-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2
checking for references to /build in /nix/store/sb2nv5nki21g9hhg86dhsi89g6zzfg57-bsd-compat-netbsd-7.1.2...

GrahamcOfBorg · 2018-05-31T17:33:55Z

Success on x86_64-darwin (full log)

Attempted: libbsd

Partial log (click to expand)

/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -d /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/share/compat
--- /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/lib/libnbcompat.a ---
/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -c  -D -m 444 libnbcompat.a /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/lib/libnbcompat.a
--- includes ---
--- /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/share/compat/defs.mk ---
/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -c  -D defs.mk /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/share/compat/defs.mk
post-installation fixup
strip is /nix/store/r5mcn9vqq80v5pfqp45d7290cis7dwp4-cctools-binutils-darwin/bin/strip
stripping (with command strip and flags -S) in /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2

GrahamcOfBorg · 2018-05-31T17:33:58Z

Success on aarch64-linux (full log)

Attempted: libbsd

Partial log (click to expand)

--- /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2/share/compat/defs.mk ---
/nix/store/nnkwjkcjqw94knaxpzwl7sysx72xab3z-coreutils-8.29/bin/install -c  -D defs.mk /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2/share/compat/defs.mk
--- includes ---
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2
strip is /nix/store/8yfik687kfccisxnad42j19lfb7ij9b4-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2
checking for references to /build in /nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2...
/nix/store/kaln74gz597hwgzmfs8dix6d3lgi4y7f-bsd-compat-netbsd-7.1.2

matthewbauer · 2018-05-31T18:24:11Z

@GrahamcOfBorg build mg

GrahamcOfBorg · 2018-05-31T18:24:49Z

Failure on aarch64-linux (full log)

Attempted: mg

Partial log (click to expand)

   n = (int)strtonum(buf, INT_MIN, INT_MAX, &err);
            ^~~~~~~~
            strtou
cscope.c: In function 'addentry':
cscope.c:498:11: warning: implicit declaration of function 'strtonum'; did you mean 'strtou'? [-Wimplicit-function-declaration]
  lineno = strtonum(t.lineno, INT_MIN, INT_MAX, &errstr);
           ^~~~~~~~
           strtou
builder for '/nix/store/j5w3541fhr07kap0x1jiv7qgcdrb7br0-mg-20171014.drv' failed with exit code 2
�[31;1merror:�[0m build of '/nix/store/j5w3541fhr07kap0x1jiv7qgcdrb7br0-mg-20171014.drv' failed

GrahamcOfBorg · 2018-05-31T18:24:58Z

Failure on x86_64-darwin (full log)

Attempted: mg

Partial log (click to expand)

./def.h:42:9: warning: 'TRUE' macro redefined [-Wmacro-redefined]
#define TRUE    1               /* True, yes, good, etc.         */
        ^
/nix/store/apmsjghssi4wyfbx7wdaar5bxbdn0rcr-bsd-compat-netbsd-7.1.2/include/rpc/types.h:59:10: note: previous definition is here
#       define TRUE     (1)
               ^
2 warnings generated.
2 warnings generated.
builder for '/nix/store/x48sqfxlr6v6hykksp6zdkbx0wq7lsl3-mg-20171014.drv' failed with exit code 2
error: build of '/nix/store/x48sqfxlr6v6hykksp6zdkbx0wq7lsl3-mg-20171014.drv' failed

GrahamcOfBorg · 2018-05-31T18:25:47Z

Failure on x86_64-linux (full log)

Attempted: mg

Partial log (click to expand)

                ^~~~~~~~
                strtou
tags.c:11:10: fatal error: sys/tree.h: No such file or directory
 #include <sys/tree.h>
          ^~~~~~~~~~~~
compilation terminated.
make: *** [GNUmakefile:63: tags.o] Error 1
make: *** Waiting for unfinished jobs....
builder for '/nix/store/9jigxr2y1b5cwbzi50rvqkkj0kx6pfdd-mg-20171014.drv' failed with exit code 2
error: build of '/nix/store/9jigxr2y1b5cwbzi50rvqkkj0kx6pfdd-mg-20171014.drv' failed

Ericson2314 · 2018-05-31T20:53:51Z

pkgs/top-level/all-packages.nix

@@ -21462,6 +21457,10 @@ with pkgs;
                      mount wall hostname more sysctl getconf
                      getent;

+  fts = if hostPlatform.isMusl then netbsd.fts else null;


Maybe there is some meta.available thing you can do instead of null?

It should be provided by most libcs except for Musl. It will build everywhere, just runs on Musl.

GrahamcOfBorg · 2018-05-31T21:28:35Z

Success on x86_64-linux (full log)

Attempted: libbsd

Partial log (click to expand)

/nix/store/7ks9bl96a1793lxjk9vyxyf80a5m6a5f-coreutils-8.29/bin/install -c  -D nbtool_config.h /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2/include/compat/nbtool_config.h
--- /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2/share/compat/defs.mk ---
/nix/store/7ks9bl96a1793lxjk9vyxyf80a5m6a5f-coreutils-8.29/bin/install -c  -D defs.mk /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2/share/compat/defs.mk
--- includes ---
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2
strip is /nix/store/92d2ifxcni4n3zx9s8wnkcjlvnx5ajlc-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2
checking for references to /build in /nix/store/m0r3n0b0wdnanq2y65mmx65s4j2aw0p9-bsd-compat-netbsd-7.1.2...

GrahamcOfBorg · 2018-05-31T21:29:25Z

Success on x86_64-darwin (full log)

Attempted: libbsd

Partial log (click to expand)

/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -c  -D nbtool_config.h /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/include/compat/nbtool_config.h
--- /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/lib/libnbcompat.a ---
/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -c  -D -m 444 libnbcompat.a /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/lib/libnbcompat.a
--- /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/share/compat/defs.mk ---
/nix/store/l28y6zy1qfiqhpcs37kvclabj066a8v7-coreutils-8.29/bin/install -c  -D defs.mk /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/share/compat/defs.mk
--- includes ---
post-installation fixup
strip is /nix/store/r5mcn9vqq80v5pfqp45d7290cis7dwp4-cctools-binutils-darwin/bin/strip
stripping (with command strip and flags -S) in /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/r7wk5jrf54vkni76x36vjrycdj2nx9xq-bsd-compat-netbsd-7.1.2

GrahamcOfBorg · 2018-05-31T21:29:41Z

Success on aarch64-linux (full log)

Attempted: libbsd

Partial log (click to expand)

--- /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2/share/compat/defs.mk ---
/nix/store/nnkwjkcjqw94knaxpzwl7sysx72xab3z-coreutils-8.29/bin/install -c  -D defs.mk /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2/share/compat/defs.mk
--- includes ---
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2
strip is /nix/store/8yfik687kfccisxnad42j19lfb7ij9b4-binutils-2.30/bin/strip
stripping (with command strip and flags -S) in /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2/lib
patching script interpreter paths in /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2
checking for references to /build in /nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2...
/nix/store/316bnjm5ci5g9zdssbrnrsaly9fzdxjm-bsd-compat-netbsd-7.1.2

edolstra · 2018-06-01T10:55:28Z

I don't understand what this means. Why would we want to use "more NetBSD stuff"? If the goal is to move away from GNU, 👎.

matthewbauer · 2018-06-01T15:31:11Z

I don't understand what this means. Why would we want to use "more NetBSD stuff"

I should have been more clear. This gets our BSD derivations directly from the upstream NetBSD CVS tree. Previously we were relying on "Linux"ized derivations of BSD sources. There are basically two things this changes:

Replace libbsd with NetBSD compat. The Freedesktop project maintains libbsd but they only support it on Linux platforms. libbsd works great for Linux but unfortunately lacks feature detection & requires heavy patching for macOS or really anything else that's not GNU/Linux. NetBSD compat does proper feature detection so should work almost anywhere. (https://github.com/NetBSD/src/tree/trunk/tools/compat)
Replace musl-* stuff with direct NetBSD derivation. These are all derived from NetBSD sources originally but we were relying on Alpine Linux's version of them. Moving to upstream should be more reliable.

Ericson2314 · 2018-06-01T17:27:56Z

@edolstra yeah even more pithily put, this is not moving away from GNU, but just using upstream version of the non-GNU stuff we already use.

vcunat · 2018-06-02T11:44:22Z

This broke samba build, now discussed on #nixos-dev with @7c6f434c.

a partial rollback of NixOS#41320 samba is already Linux-only because of acl, and it is unclear what the problem is with upstream netbsd-compat.

orivej · 2018-06-06T02:43:22Z

This has broken all packages that depend on libbsd, and the reason is obvious if you compare the include files that they install:

# freedesktop libbsd      # netbsd compat
└── bsd                   ├── cdbr.h
    ├── bitstring.h       ├── cdbw.h
    ├── bsd.h             ├── compat_defs.h
    ├── err.h             ├── db.h
    ├── getopt.h          ├── machine
    ├── inttypes.h        │   ├── bswap.h
    ├── libutil.h         │   └── endian.h
    ├── md5.h             ├── md5.h
    ├── netinet           ├── nbtool_config.h
    │   └── ip_icmp.h     ├── netconfig.h
    ├── nlist.h           ├── rmd160.h
    ├── readpassphrase.h  ├── rpc
    ├── stdio.h           │   └── types.h
    ├── stdlib.h          ├── sha1.h
    ├── string.h          ├── sha2.h
    ├── stringlist.h      ├── sys
    ├── sys               │   ├── bswap.h
    │   ├── bitstring.h   │   ├── endian.h
    │   ├── cdefs.h       │   ├── featuretest.h
    │   ├── endian.h      │   ├── queue.h
    │   ├── poll.h        │   └── tree.h
    │   ├── queue.h       ├── tzfile.h
    │   ├── time.h        ├── util.h
    │   └── tree.h        ├── utmpx.h
    ├── timeconv.h        └── vis.h
    ├── unistd.h
    ├── vis.h
    └── wchar.h

acme-client:

config.h:21:12: fatal error: bsd/stdlib.h: No such file or directory

hfsprogs:

/build/diskdev_cmds-332.25/include/missing.h:9:10: fatal error: bsd/string.h: No such file or directory

radiotray-ng:

-- Checking for one of the modules 'libbsd'
CMake Error at /nix/store/5adacq979k95wi13q6fzhdddgxbqnpz0-cmake-3.11.2/share/cmake-3.11/Modules/FindPkgConfig.cmake:640 (message):
  None of the required 'libbsd' found

where radiotray-ng CMakeLists.txt contains

if (NOT APPLE)
    pkg_search_module(LIBBSD  REQUIRED libbsd)
endif(NOT APPLE)

Clearly nbcompat can not replace libbsd.

matthewbauer · 2018-06-06T02:57:31Z

Yes if someone wants to undo the libbsd = netbsd.compat they are certainly welcome to. A few do build but mostly just ones using basic symbols like strlcpy. I still want to minimize libbsd usage in nixpkgs but it is obviously not a drop in replacement right now.

orivej · 2018-06-06T03:29:25Z

OK, I'll undo libbsd = netbsd.compat.

I have noticed that having a direct or an indirect dependency on netbsd.compat adds -include nbtool_config.h to NIX_CFLAGS_COMPILE (here), which prepends a lot of stuff to every compiled file, such as:

#define HAVE_ASPRINTF 1
#define HAVE_FEATURES_H 1
#define STDC_HEADERS 1

#include "compat_defs.h"

# ← from compat_defs.h

#if defined(__linux__) && HAVE_FEATURES_H
#include <features.h>
#undef _POSIX_SOURCE
#undef _POSIX_C_SOURCE
#define __USE_ISOC99 1
#endif

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#undef btodb
#define btodb(x) ((x) << 9)
#undef setbit
#define	setbit(a,i)	((a)[(i)/NBBY] |= 1<<((i)%NBBY))

and e.g. this file compiles and runs:

int main() {
    puts("hello");
    return btodb(10);
}

Is this -include necessary? If it is, can it be limited to direct dependencies? It has high potential to introduce subtle breakages.

matthewbauer · 2018-06-06T03:34:57Z

It may not be necessary any more but it definitely was at one point. The NetBSD derivations are built on top of this so they need those defines to avoid compatibility issues. This is supposed to get you to a BSD-compatible system. I can look into either disabling the default or making it optional though.

orivej · 2018-06-06T03:37:28Z

If only stuff under netbsd will depend on netbsd.compat, then it seems OK to leave this as is.

This reverts commit 480434f. netbsd.compat does not provide include files that are provided by libbsd [1], and it encumbers its transitive dependents with an obligatory include file that setups BSD-compatible C environment [2]. [1] NixOS#41320 (comment) [2] NixOS#41320 (comment)

orivej · 2018-06-06T04:34:30Z

Sorry, I was wrong about indirect dependencies in:

I have noticed that having a direct or an indirect dependency on netbsd.compat adds -include nbtool_config.h to NIX_CFLAGS_COMPILE
Is this -include necessary? If it is, can it be limited to direct dependencies?

I have tested this with a package that indirectly depended on netbsd.fts which propagates netbsd.compat.

However, a package with -include nbtool_config.h in its setupHook should not be propagated. The packages that currently propagate it should have the same setupHook instead. I'm going to propose this in a PR.

matthewbauer added 3 commits May 31, 2018 12:36

netbsd: allow replacing nbcompat with libbsd

fd874b7

libbsd: replace with nbcompat

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Learn about vigilant mode

480434f

treewide: get rid of musl stuff

e993225

matthewbauer force-pushed the bsd-switch branch from 640ffcf to e993225 Compare May 31, 2018 16:37

fix eval

ae6a4a9

matthewbauer force-pushed the bsd-switch branch from 7b91fd1 to ae6a4a9 Compare May 31, 2018 17:17

GrahamcOfBorg added 8.has: clean-up 8.has: package (new) 10.rebuild-darwin: 501+ 10.rebuild-linux: 101-500 labels May 31, 2018

matthewbauer requested review from dtzWill and Ericson2314 May 31, 2018 17:38

Ericson2314 reviewed May 31, 2018

View reviewed changes

add sys/tree.h is needed for mg

7aca4b4

Ericson2314 changed the title ~~Switch Nixpkgs to using more NetBSD stuff~~ Switch Nixpkgs to using more NetBSD stuff for MUSL Jun 1, 2018

Ericson2314 merged commit 7a2dd97 into NixOS:master Jun 1, 2018

orivej mentioned this pull request Jun 6, 2018

Restore freedesktop libbsd #41522

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Switch Nixpkgs to using more NetBSD stuff for MUSL #41320

Switch Nixpkgs to using more NetBSD stuff for MUSL #41320

matthewbauer commented May 31, 2018 •

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Switch Nixpkgs to using more NetBSD stuff for MUSL #41320

Switch Nixpkgs to using more NetBSD stuff for MUSL #41320

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