[GNC-dev] Possible fixes needed -- or maybe an anomaly with make and Ubuntu 23.10

   Don't know whether or not the following needs a developer's attention.
   I attempted to include as much context as needed.  Just did a git pull
   to update to 5.5-87 then did a successful build.  So it must not be too
   disastrous.  Perhaps just an anomaly with make on Ubuntu 23.10.
   -- The C compiler identification is GNU 13.2.0
   -- The CXX compiler identification is GNU 13.2.0
   [ 19%] Generating swig-unittest-support-python.c, unittest_support.py
   Deprecated command line option: -py3. Ignored, this option is no longer
   supported.
   [ 19%] Built target swig-unittest-support-python
   [ 30%] Linking CXX shared library
   ../../../lib/libgnc-backend-xml-utils.so
   /usr/bin/ld:
   CMakeFiles/gnc-backend-xml-utils.dir/gnc-xml-backend.cpp.o: in function
   `GncXmlBackend::write_to_file(bool)':
   /home/steve/Projects/GnuCash/gnucash/libgnucash/backend/xml/gnc-xml-bac
   kend.cpp:390:(.text+0x1447):
   warning: the use of `mktemp' is dangerous, better use `mkstemp' or
   `mkdtemp'
   [ 30%] Built target gnc-backend-xml-utils
   [ 32%] Generating
   ../../lib/x86_64-linux-gnu/guile/3.0/site-ccache/gnucash/app-utils/date
   -utilities.go
   <unknown-location>: warning: non-literal format string
   wrote
   `/home/steve/Projects/GnuCash/Build-gnucash_5.5-87/lib/x86_64-linux-gnu
   /guile/3.0/site-ccache/gnucash/app-utils/date-utilities.go'
   [ 32%] Built target scm-app-utils-1
   [ 77%] Generating
   ../../../lib/x86_64-linux-gnu/guile/3.0/site-ccache/gnucash/reports/sta
   ndard/advanced-portfolio.go
   <unknown-location>: warning: non-literal format string
   wrote
   `/home/steve/Projects/GnuCash/Build-gnucash_5.5-87/lib/x86_64-linux-gnu
   /guile/3.0/site-ccache/gnucash/reports/standard/advanced-portfolio.go'
   [ 78%] Generating
   ../../../lib/x86_64-linux-gnu/guile/3.0/site-ccache/gnucash/reports/sta
   ndard/category-barchart.go
   <unknown-location>: warning: non-literal format string
   wrote
   `/home/steve/Projects/GnuCash/Build-gnucash_5.5-87/lib/x86_64-linux-gnu
   /guile/3.0/site-ccache/gnucash/reports/standard/category-barchart.go'
   [100%] Generating gnucash_core.c, gnucash_core_c.py
   Deprecated command line option: -py3. Ignored, this option is no longer
   supported.
   [100%] Built target swig-gnucash-core
   [100%] Generating swig-core-utils-python.c, sw_core_utils.py
   Deprecated command line option: -py3. Ignored, this option is no longer
   supported.
   [100%] Built target swig-core-utils-python
   [100%] Generating swig-app-utils-python.c, sw_app_utils.py
   Deprecated command line option: -py3. Ignored, this option is no longer
   supported.
   [100%] Built target swig-app-utils-python