releases:3.2.0:developersguide:usingnetbsdcode [Wiki]

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====== NetBSD libc invocation ======

NetBSD libc is in the master branch and hooked into the make world/elf-libraries procedure.

In the latest version of the master branch, gcc and clang *always* use the netbsd headers and libraries, and no elf libraries of the minix libraries are generated any more, to simplify things.

====== NetBSD Code Patch System ======

In order to be able to neatly track NetBSD sources, and easily import and patch more, there is a system to retrieve NetBSD sources using cvs, and automatically generate patch files from the current Minix code with respect to the current NetBSD code.

===== Imported NetBSD code =====

The list of imported NetBSD sub-hierarchies is in **tools/nbsd_ports**. Each line is an imported hierarchy, where the first column is the Minix location, and the second column is the NetBSD CVS location. E.g.:
<code>
common/lib/libc		src/common/lib/libc
lib/nbsd_libc		src/lib/libc
lib/nbsd_libm		src/lib/libm
nbsd_include		src/include
</code>
The CVS revision of the NetBSD code currently imported in Minix is set in **nbsd.config**.
==== Hierarchy Maintenance ====
Install the ''cvs'' package.
<code>
pkgin in cvs
</code>
After running the following command, the original NetBSD sources will be stored, for reference, in src/nbsdsrc.
<code>
cd /usr/src/tools && make nbsd_fetch
</code>
Using **nbsd.config**, this fetches the right revision of the imported hierarchies.

To update each hierarchy's patch file (minix-port.patch):
<code>
make nbsd_diff
</code>

====== Remaining Issues ======
  * Implement issetugid.c
  * Can't build image with clang
  * RENAME
  * syslog doesn't seem to work (connects to unix domain socket)
  * Make off_t, time_t, mode_t match NetBSD's types
  * Clean up other warnings
  * The sys/bswap.h header indirectly includes sys/endian.h, which implicitly declares the bswap{16,32,64} functions; sys/bswap.h later declares them as well, resulting in a compilation error
  * Phase out MINIX sed
  * zoneinfo build problem with gcc/clang
  * signal number conflicts
  * test set build failures
  * <unistd.h> feature-test macros vary on the level of POSIX conformance (_POSIX*_VERSION), functionnality of chown (_POSIX_CHOWN_RESTRICTED), path too long signalling (_POSIX_NO_TRUNC), support of job control (_POSIX_JOB_CONTROL), perhaps tty disabling (_POSIX_VDISABLE, cannot figure it out), and a host of post-1993 POSIX features, not all of them implemented in the MINIX system; I guess src/nbsd_include/sys/unistd.h is unchanged from NetBSD
  * not-stubbed uuid_xxx(3) functions (need uuidgen).
  * widely distributed ~/.ashrc uses non-standard construction ''if [ "$-" : '.*i.*''' which takes advantage of ''expr'' and ''test''/''['' being the same with MINIX port of ''ash(1)'', not so with NetBSD
  * MSG_DONTWAIT is missing

====== Resolved Issues, with future follow-up ======
  * dns lookups need resolv.conf; fine, we need a resolv.conf then; when everyone uses it, we can phase out nonamed
  * Password format
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