Building NetBSD 11 Release from Source Fails on Linux/MacOS

[Helge Pfeiffer <ropf%itu.dk@localhost>]

Dear all,

I am new to NetBSD. I am trying to build NetBSD 11 for amd64 x86_64 from source.
I tried it both on a Linux (Pop!_OS 22.04 LTS, which is an Ubuntu 22.04) host and on a MacOS (Sequoia). On both hosts, I
see the same issue. Building a release fails, see my detailed description below. 


Specifically, I am doing the following:

1. I checkout the source code of the NetBSD 11 branch from the Git repository mirror on GitHub:
   `git clone --depth 1 https://github.com/NetBSD/src.git -b netbsd-11 netbsd-11-src`
2. I build the tools
   `./build.sh -U -u -j12 -m amd64 -a x86_64 -O ./obj tools`
   Building the tools works. No errors are reported.
3. I try to build a release with the following command:
   `./build.sh -U -u -j12 -m amd64 -a x86_64 -O ./obj release`

Step 3 fails. When inspecting the logs, I can see the following error:

```
nbmake[4]: stopped making "build_install" in /home/user/workspace/netbsd-11-src/lib

nbmake[3]: stopped making "do-lib" in /home/user/workspace/netbsd-11-src

nbmake[2]: stopped making "build" in /home/user/workspace/netbsd-11-src

nbmake[1]: stopped making "distribution" in /home/user/workspace/netbsd-11-src

nbmake: stopped making "release" in /home/user/workspace/netbsd-11-src

ERROR: Failed to make release

*** BUILD ABORTED ***
```

When I scroll through the build logs, I can see that there are issues with the nbm4 macro processor.
For example, I can see output as in the following, which I believe is the source of the problem:

```
nbm4: unexpected end of input, unclosed parenthesis:
   /home/user/workspace/netbsd-11-src/external/lgpl3/gmp/lib/libgmp/../../dist/mpn/x86_64/sqr_diag_addlsh1.asm at line
116

*** Failed target: sqr_diag_addlsh1.s
*** In directory: /home/user/workspace/netbsd-11-src/external/lgpl3/gmp/lib/libgmp
*** Failed commands:
    ${TOOL_M4} -DCONFIG_TOP_SRCDIR=${DIST} ${BUILD_S_INCS}  ${M4FLAGS} ${M4FLAGS.${.TARGET:R}}  -DOPERATION_${.TARGET:R}
${DIST}/${:Umpn/x86_64/sqr_diag_addlsh1.asm} > ${.TARGET}
    => /home/user/workspace/netbsd-11-src/./obj/tooldir.Linux-5.19.0-76051900-generic-x86_64/bin/nbm4 -
DCONFIG_TOP_SRCDIR=/home/user/workspace/netbsd-11-src/external/lgpl3/gmp/lib/libgmp/../../dist -
I/home/user/workspace/netbsd-11-src/external/lgpl3/gmp/lib/libgmp -I/home/user/workspace/netbsd-11-
src/./obj/external/lgpl3/gmp/lib/libgmp/dummy -I/home/user/workspace/netbsd-11-
src/external/lgpl3/gmp/lib/libgmp/../../dist/ -I/home/user/workspace/netbsd-11-
src/external/lgpl3/gmp/lib/libgmp/../../dist/mpn  -I/home/user/workspace/netbsd-11-
src/./obj/external/lgpl3/gmp/lib/libgmp  -DPIC   -DOPERATION_sqr_diag_addlsh1 /home/user/workspace/netbsd-11-
src/external/lgpl3/gmp/lib/libgmp/../../dist/mpn/x86_64/sqr_diag_addlsh1.asm > sqr_diag_addlsh1.s
*** [sqr_diag_addlsh1.s] Error code 1
```

When inspecting the file `external/lgpl3/gmp/dist/mpn/x86_64/sqr_diag_addlsh1.asm`, I see that on line 33, a file
`../config.m4` is referenced (33 include(`../config.m4').
However, there is no file `config.m4` under `external/lgpl3/gmp/dist/mpn/` (nor under
`external/lgpl3/gmp/dist/mpn/x86_64/`). The only `config.m4` files that I can find are under the respective lib
directory, e.g., `external/lgpl3/gmp/lib/libgmp/arch/x86_64/config.m4` (I found them via `find external/lgpl3/gmp -name
config.m4 | sort`).

Now, I do not know how to proceed. I am wondering:

a) Is there a problem with the configuration step and the file `config.m4` is not generated in
`external/lgpl3/gmp/dist/mpn/`?
   (Unfortunately, I cannot find a log message that suggests that, but I also do not know what to look for precisely...)
b) Is the `config.m4` file that `nbm4` expects under `external/lgpl3/gmp/dist/mpn/` the one that is under
`external/lgpl3/gmp/lib/libgmp/arch/x86_64/config.m4`?
   If yes, why is it there and how shall I get it to the right place without manually copying/linking it there?


I searched the problem databases for "nbm4 external/lgpl3/gmp/" and "NetBSD 11 from source", but I do not find anything
related to my issue there.
When searching with the same search queries in the mailing list archive, I cannot find messages that address/solve my
problem.



I would appreciate any help so that I can build NetBSD 11 from source. Thank you very much in advance.


Best,
Helge