Before split-out of libpdbxpp

.travis.yml

-language: cpp
-
-os:
-  - linux
-  - osx
-
-dist: focal
-
-osx_image:
-  - xcode12
-
-compiler:
-  - gcc
-  - clang
-
-addons:
-  apt:
-    packages:
-      - libboost-all-dev
-
-before_install:
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew install make; fi
-
-script:
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then ./configure --disable-shared --disable-revision --disable-download-ccd ; else ./configure --disable-revision --disable-download-ccd ; fi
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then gmake                        ; else make             ; fi
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then gmake test                   ; else make test        ; fi
-  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then sudo gmake install           ; else sudo make install; fi
-
-# jobs:
-#   allow_failures:
-#     - os: osx
-

CMakeLists.txt

@@ -156,6 +156,13 @@ try_run(STD_REGEX_RUNNING STD_REGEX_COMPILING
 if(STD_REGEX_RUNNING STREQUAL FAILED_TO_RUN)
 	message(WARNING "You are probably trying to compile using the g++ standard library which contains a crashing std::regex implementation. Will try to use boost::regex instead")
 
+	# Test to see if the submodule was loaded
+	find_file(HAVE_BOOST_REGEX_HPP regex.hpp PATHS ${PROJECT_SOURCE_DIR}/regex/include/boost NO_DEFAULT_PATH)
+
+	if (NOT HAVE_BOOST_REGEX_HPP)
+		message(FATAL_ERROR "The submodule regex was not loaded, please run git submodule update --init ")
+	endif()
+
 	set(BOOST_REGEX_STANDALONE ON)
 	add_subdirectory(regex)
 endif()

libcifpp.pc.in

@@ -8,5 +8,6 @@ Name: libcifpp
 Description: C++ library for the manipulation of mmCIF files.
 Version: @PACKAGE_VERSION@
 
-Libs: -L${libdir} -lcifpp -lz
+Requires.private: zlib, liblzma
+Libs: -L${libdir} -lcifpp
 Cflags: -I${includedir} -pthread