Allow for system pcre to take precedence.

CMake/Modules/FindPcre.cmake

@@ -0,0 +1,17 @@
+# Find pcre using standard tools.
+
+# The following will be set:
+
+# PCRE_INCLUDE_DIR
+# PCRE_LIBRARY
+# PCRE_FOUND
+
+find_path(PCRE_INCLUDE_DIR NAMES pcre.h)
+find_library(PCRE_LIBRARY NAMES pcre)
+
+# Properly pass QUIETLY and REQUIRED.
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PCRE DEFAULT_MSG PCRE_INCLUDE_DIR PCRE_LIBRARY)
+
+mark_as_advanced(PCRE_INCLUDE_DIR PCRE_LIBRARY)
+

CMakeLists.txt

@@ -106,6 +106,7 @@ set(ENDIANNESS "ENDIAN_LITTLE")
 if(WIN32)
   set(HAS_OGG TRUE)
   set(HAS_MP3 TRUE)
+  set(SYSTEM_PCRE_FOUND FALSE)
   find_package(DirectX REQUIRED)
   
   # FFMPEG...it can be evil.
@@ -131,6 +132,7 @@ if(WIN32)
 elseif(MACOSX)
   set(HAS_OGG TRUE)
   set(HAS_MP3 TRUE)
+  set(SYSTEM_PCRE_FOUND FALSE)
   set(WITH_CRASH_HANDLER TRUE)
   # Apple Archs needs to be 32-bit for now.
   # When SDL2 is introduced, this may change.
@@ -189,6 +191,9 @@ elseif(LINUX)
 
   find_package(X11)
 
+  find_package(Pcre)
+  set(SYSTEM_PCRE_FOUND ${PCRE_FOUND})
+
   find_package("BZip2")
   if (NOT(${BZIP2_FOUND}))
     message(FATAL_ERROR "Bzip2 support required.")

extern/CMakeLists.txt

@@ -1,7 +1,9 @@
 include(CMakeProject-lua.cmake)
 include(CMakeProject-glew.cmake)
 include(CMakeProject-json.cmake)
-include(CMakeProject-pcre.cmake)
+if (NOT SYSTEM_PCRE_FOUND)
+  include(CMakeProject-pcre.cmake)
+endif()
 include(CMakeProject-tomcrypt.cmake)
 include(CMakeProject-tommath.cmake)
 if (APPLE OR MSVC)

src/CMakeLists.txt

@@ -296,10 +296,13 @@ list(APPEND SMDATA_LINK_LIB
   "mad"
   "png"
   "glew"
-  "pcre"
   "jpeg"
 )
 
+if (NOT SYSTEM_PCRE_FOUND)
+  list(INSERT SMDATA_LINK_LIB 8 "pcre")
+endif()
+
 if (WIN32)
   list(APPEND SMDATA_LINK_LIB
     # The misc libraries are here.
@@ -444,6 +447,10 @@ else() # Unix / Linux
     list(APPEND SMDATA_LINK_LIB ${X11_LIBRARIES})
   endif()
 
+  if(PCRE_FOUND)
+    list(APPEND SMDATA_LINK_LIB ${PCRE_LIBRARY})
+  endif()
+
   list(APPEND SMDATA_LINK_LIB
     ${XRANDR_LIBRARIES}
   )
@@ -481,6 +488,9 @@ if(NOT APPLE)
     if (X11_FOUND)
       list(APPEND SM_INCLUDE_DIRS "${X11_INCLUDE_DIR}")
     endif()
+    if (PCRE_FOUND)
+      list(APPEND SM_INCLUDE_DIRS "${PCRE_INCLUDE_DIR}")
+    endif()
   endif()
 else()
   list(APPEND SM_INCLUDE_DIRS