lnav @0.12.0_0 fails to build on mavericks

[tehcog (tehcog)]

:info:build fs_util.cc:91:15: error: use of undeclared identifier 'mkostemp'; did you mean 'mkstemps'?
:info:build     if ((fd = mkostemp(pattern_copy, O_CLOEXEC)) == -1) {
:info:build               ^~~~~~~~
:info:build               mkstemps
:info:build /usr/include/unistd.h:671:6: note: 'mkstemps' declared here
:info:build int      mkstemps(char *, int);
:info:build          ^
:info:build depbase=`echo is_utf8.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
:info:build 	/opt/local/bin/clang++-mp-16 -std=c++14 -DHAVE_CONFIG_H -I. -I../../src   -Wall -I../../src/ -I../../src/third-party -I../../src/fmtlib -I../../src/third-party/date/include -I../../src/third-party/scnlib/include     -I/opt/local/include -I../../src/third-party/doctest-root -isystem/opt/local/include/LegacySupport -I/opt/local/include -D_ISOC99_SOURCE -D__STDC_LIMIT_MACROS -D_GNU_SOURCE -DUSE_OS_TZDB=1 -DHAS_REMOTE_API=0 -I/opt/local/include -I/opt/local/include -I/opt/local/include -I/usr/local/include  -pipe -Os -stdlib=libc++ -arch x86_64 -pthread -MT is_utf8.o -MD -MP -MF $depbase.Tpo -c -o is_utf8.o is_utf8.cc &&\
:info:build 	mv -f $depbase.Tpo $depbase.Po
:info:build 1 error generated.
:info:build make[3]: *** [fs_util.o] Error 1

[ryandesign (Ryan Carsten Schmidt)]

mkostemp was introduced in macOS 10.12. So this issue is not specific to MacPorts and would occur for any user trying to compile lnav on OS X 10.11 or earlier. You could file an ​lnav bug report about it and see if the developer can add a workaround.