Add dependency on PCRE

Perl-compatible regular expression library

CMake/FindPCRE.cmake

@@ -0,0 +1,37 @@
+# Copyright (C) 2007-2009 LuaDist.
+# Created by Peter Kapec <kapecp@gmail.com>
+# Redistribution and use of this file is allowed according to the terms of the MIT license.
+# For details see the COPYRIGHT file distributed with LuaDist.
+#	Note:
+#		Searching headers and libraries is very simple and is NOT as powerful as scripts
+#		distributed with CMake, because LuaDist defines directories to search for.
+#		Everyone is encouraged to contact the author with improvements. Maybe this file
+#		becomes part of CMake distribution sometimes.
+
+# - Find pcre
+# Find the native PCRE headers and libraries.
+#
+# PCRE_INCLUDE_DIRS	- where to find pcre.h, etc.
+# PCRE_LIBRARIES	- List of libraries when using pcre.
+# PCRE_FOUND	- True if pcre found.
+
+# Look for the header file.
+FIND_PATH(PCRE_INCLUDE_DIR NAMES pcre.h)
+
+# Look for the library.
+FIND_LIBRARY(PCRE_LIBRARY NAMES pcre)
+
+# Handle the QUIETLY and REQUIRED arguments and set PCRE_FOUND to TRUE if all listed variables are TRUE.
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(PCRE DEFAULT_MSG PCRE_LIBRARY PCRE_INCLUDE_DIR)
+
+# Copy the results to the output variables.
+IF(PCRE_FOUND)
+	SET(PCRE_LIBRARIES ${PCRE_LIBRARY})
+	SET(PCRE_INCLUDE_DIRS ${PCRE_INCLUDE_DIR})
+ELSE(PCRE_FOUND)
+	SET(PCRE_LIBRARIES)
+	SET(PCRE_INCLUDE_DIRS)
+ENDIF(PCRE_FOUND)
+
+MARK_AS_ADVANCED(PCRE_INCLUDE_DIRS PCRE_LIBRARIES)

CMakeLists.txt

@@ -9,19 +9,13 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMake)
 find_package(XKBCommon REQUIRED)
 find_package(WLC REQUIRED)
 find_package(A2X REQUIRED)
-
-if (UNIX)
-   find_library(DL_LIBRARY dl)
-   mark_as_advanced(DL_LIBRARY)
-   if (NOT DL_LIBRARY)
-      message(FATAL_ERROR "libdl is needed on unix systems")
-   endif ()
-endif (UNIX)
+find_package(PCRE REQUIRED)
 
 FILE(GLOB sources ${PROJECT_SOURCE_DIR}/sway/*.c)
 
 include_directories(
    ${WLC_INCLUDE_DIRS}
+   ${PCRE_INCLUDE_DIRS}
    include/
 )
 
@@ -32,7 +26,7 @@ add_executable(sway
 target_link_libraries(sway
    ${WLC_LIBRARIES}
    ${XKBCOMMON_LIBRARIES}
-   ${DL_LIBRARY}
+   ${PCRE_LIBRARIES}
 )
 
 INSTALL(