Major Description
This is on Darwin with Homebrew PCRE:
libtool: link: c++ -dynamiclib -o .libs/libtsutil.7.dylib .libs/Arena.o .libs/BaseLogFile.o .libs/Bitops.o .libs/ConsistentHash.o .libs/ContFlags.o .libs/Diags.o .libs/EventNotify.o .libs/Hash.o .libs/HashFNV.o .libs/HashMD5.o .libs/HashSip.o .libs/HostLookup.o .libs/IpMap.o .libs/IpMapConf.o .libs/Layout.o .libs/MMH.o .libs/MatcherUtils.o .libs/ParseRules.o .libs/RawHashTable.o .libs/RbTree.o .libs/Regex.o .libs/Regression.o .libs/TextBuffer.o .libs/Tokenizer.o .libs/Vec.o .libs/Version.o .libs/fastlz.o .libs/hugepages.o .libs/ink_args.o .libs/ink_assert.o .libs/ink_base64.o .libs/ink_cap.o .libs/ink_code.o .libs/ink_defs.o .libs/ink_error.o .libs/ink_file.o .libs/ink_hash_table.o .libs/ink_hrtime.o .libs/ink_inet.o .libs/ink_memory.o .libs/ink_mutex.o .libs/ink_queue.o .libs/ink_queue_utils.o .libs/ink_rand.o .libs/ink_res_init.o .libs/ink_res_mkquery.o .libs/ink_resource.o .libs/ink_rwlock.o .libs/ink_sock.o .libs/ink_sprintf.o .libs/ink_stack_trace.o .libs/ink_string++.o .libs/ink_string.o .libs/ink_sys_control.o .libs/ink_syslog.o .libs/ink_thread.o .libs/ink_time.o .libs/llqueue.o .libs/lockfile.o .libs/signals.o .libs/X509HostnameValidator.o -L/usr/local/Cellar/openssl/1.0.2g/lib -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/lib -L/usr/local/Cellar/pcre/8.38/lib -lssl -lcrypto -ltcl -lresolv -lc -lpcre -lexpat -g -mcx16 -install_name /opt/ats/lib/libtsutil.7.dylib -compatibility_version 8 -current_version 8.0 -Wl,-single_module Undefined symbols for architecture x86_64: "_pcre_assign_jit_stack", referenced from: Regex::compile(char const*, unsigned int) in Regex.o "_pcre_free_study", referenced from: Regex::~Regex() in Regex.o "_pcre_jit_stack_alloc", referenced from: get_jit_stack(void*) in Regex.o "_pcre_jit_stack_free", referenced from: RegexThreadKey::RegexThreadKey() in Regex.o ld: symbol(s) not found for architecture x86_64
It looks like the PCRE JIT code checks for PCRE_CONFIG_JIT, but that would always be defined so that apps can make runtime checks for JIT support.