office-gobmx/m4
Michael Stahl 0028266e34 configure: default to --with-system-nss on Linux
NSS is very ABI compatible and part of current LSB 5.0 and so it should
just work to use the one from the system, i'm not aware of a Linux that
doesn't ship it.

There used to be some feature patch in external/nss but this was removed
years ago, now it just contains build fixes.

Problems can occur if a mixture of system and bundled NSS libraries is
loaded, if first an old version .so is loaded and then newer version .so
depends on it but can't find some required symbol.

See for example:
https://www.mail-archive.com/libreoffice@lists.freedesktop.org/msg287043.html

Another issue is that e.g. Fedora ships libnsspem.so in the nss-pem
package, which may cause trouble in ASAN builds, where the internal NSS
is built to call __asan_poison_memory_region but the system
libnss-pem.so doesn't call __asan_unpoison_memory_region so we get:

  ==2568944==ERROR: AddressSanitizer: use-after-poison on address 0x61d0019afab0
  WRITE of size 192 at 0x61d0019afab0 thread T28 (utl::Moderator)
    0 in __interceptor_memset.part.0 (instdir/program/soffice.bin+0x466460)
    1  (/lib64/libnsspem.so+0x15f3d)
    2  (/lib64/libnsspem.so+0x16185)
    3  (/lib64/libnsspem.so+0x8a9b)
    4  (/lib64/libnsspem.so+0xe13b)
    5 in secmod_ModuleInit workdir/UnpackedTarball/nss/nss/lib/pk11wrap/pk11load.c:244:11
    ..
    21 in curl_easy_perform workdir/UnpackedTarball/curl/lib/easy.c:715:10

Also, with system NSS, things like p11-kit integration become
responsibility of the OS.

Change-Id: I50caedd46914dd5d6905c5d32d44a599cd78119e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120388
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
2022-04-29 20:24:58 +02:00
..
mac
ax_boost_base.m4
ax_boost_date_time.m4
ax_boost_filesystem.m4
ax_boost_iostreams.m4
ax_boost_locale.m4
ax_boost_system.m4
introspection.m4
l_atomic.m4
libo_check_extension.m4
libo_enable_vclplug.m4
libo_externals.m4
libo_fuzz_configury.m4
libo_pkg_version.m4
README.md

m4 Macros

m4 - Macros to locate and utilise pkg-config.