pcre: link fails for 'pcre_scanner_unittest', due to numerous undefined symbols; possible xcode 15 issue

[conradwt (Conrad Taylor)]

Details (too many undefined symbols to list all, but here are a few examples):

:info:build libtool: link: /usr/bin/clang++ -pipe -Os -stdlib=libc++ -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk
-arch arm64 -arch x86_64 -Wl,-headerpad_max_install_names -Wl,-syslibroot -Wl,/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk
-arch arm64 -arch x86_64 -o .libs/pcre_scanner_unittest pcre_scanner_unittest-pcre_scanner_unittest.o  -L/opt/local/lib ./.libs/libpcrecpp.dylib
/opt/local/var/macports/buil/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_pcre/pcre/work/pcre-8.45/.libs/libpcre.dylib

:info:build ld: Undefined symbols:
:info:build   pcrecpp::RE::Init(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, pcrecpp::RE_Options const*), referenced from:
:info:build       pcrecpp::RE::RE(char const*) in pcre_scanner_unittest-pcre_scanner_unittest.o
:info:build   pcrecpp::RE::no_arg, referenced from:
:info:build       _main in pcre_scanner_unittest-pcre_scanner_unittest.o
:info:build   pcrecpp::RE::~RE(), referenced from:
:info:build       _main in pcre_scanner_unittest-pcre_scanner_unittest.o
:info:build   pcrecpp::Arg::parse_string(char const*, int, void*), referenced from:
:info:build       _main in pcre_scanner_unittest-pcre_scanner_unittest.o

[...etc...]

:info:build make[1]: *** [pcre_scanner_unittest] Error 1
:info:build clang: error: linker command failed with exit code 1 (use -v to see invocation)
:info:build make[1]: *** [pcrecpp_unittest] Error 1

[conradwt (Conrad Taylor)]

main.log

[jmroot (Joshua Root)]

Needs the usual libtool single_module fix. Larry, I can push it for you if you want.

[jmroot (Joshua Root)]

In 661d0212412d4f428a37d31e233fa6ca1efd4331/macports-ports (master):

pcre: fix build with Xcode 15

Maintainer timeout.

Closes: #68385