- added support for libfribidi for languages requiring complex text rendering like Arabic and Hebrew

mk/cmake/Modules/FindFriBiDi.cmake

@@ -0,0 +1,92 @@
+# - Find the native FriBiDI includes and library
+#
+#
+# This module defines
+#  FRIBIDI_INCLUDE_DIR, where to find fribidi.h, etc.
+#  FRIBIDI_LIBRARIES, the libraries to link against to use FriBiDi.
+#  PNG_DEFINITIONS - You should ADD_DEFINITONS(${PNG_DEFINITIONS}) before compiling code that includes png library files.
+#  FRIBIDI_FOUND, If false, do not try to use PNG.
+# also defined, but not for general use are
+#  FRIBIDI_LIBRARY, where to find the FriBiDi library.
+#
+# If this module finds an old version of fribidi, then this module will run
+# add_definitions(-DOLD_FRIBIDI)
+
+include(CheckSymbolExists)
+
+SET(FRIBIDI_FOUND "NO")
+
+MESSAGE(STATUS "** Searching for library: FriBiDi...")
+
+# Set variable in temp var, otherwise FIND_PATH might fail
+# unset isn't present in the required version of cmake.
+FIND_PATH(xFRIBIDI_INCLUDE_DIR fribidi.h
+  /usr/local/include/fribidi
+  /usr/include/fribidi
+  )
+set(FRIBIDI_INCLUDE_DIR ${xFRIBIDI_INCLUDE_DIR})
+
+SET(FRIBIDI_NAMES ${FRIBIDI_NAMES} fribidi libfribidi)
+FIND_LIBRARY(FRIBIDI_LIBRARY
+  NAMES ${FRIBIDI_NAMES}
+  PATHS /usr/lib /usr/local/lib
+  )
+
+IF (FRIBIDI_LIBRARY AND FRIBIDI_INCLUDE_DIR)
+  SET(CMAKE_REQUIRED_INCLUDES ${FRIBIDI_INCLUDE_DIR})
+  SET(CMAKE_REQUIRED_LIBRARIES ${FRIBIDI_LIBRARY})
+  CHECK_SYMBOL_EXISTS(fribidi_utf8_to_unicode fribidi.h FOUND_fribidi_utf8_to_unicode)
+  CHECK_SYMBOL_EXISTS(fribidi_charset_to_unicode fribidi.h FOUND_fribidi_charset_to_unicode)
+  CHECK_SYMBOL_EXISTS(FRIBIDI_CHAR_SET_UTF8 fribidi.h FOUND_FRIBIDI_CHAR_SET_UTF8)
+
+  # FriBiDi provides both fribidi_utf8_to_unicode and fribidi_charset_to_unicode.
+  # The difference is that
+  #  1. fribidi >= 0.10.5 has FRIBIDI_CHAR_SET_UTF8.
+  #  2. fribidi <= 0.10.4 has FRIBIDI_CHARSET_UTF8.
+
+  # Newer versions of fribidi (not tested the initial version which has the
+  # issue, but at least 0.19.2 has the issue) no longer have the symbol
+  # FRIBIDI_CHAR_SET_UTF8.  But the symbol is build with some macros confusing
+  # cmake. To test for that case let the compiler give its verdict.
+  if(FOUND_fribidi_charset_to_unicode AND NOT FOUND_FRIBIDI_CHAR_SET_UTF8)
+	file(WRITE "${CMAKE_BINARY_DIR}/fribidi_test.c"
+			"#include <fribidi.h>\nint main(){FriBidiCharSet s = FRIBIDI_CHAR_SET_UTF8;}"
+	)
+	try_compile(FOUND_FRIBIDI_CHAR_SET_UTF8
+			"${CMAKE_BINARY_DIR}"
+			"${CMAKE_BINARY_DIR}/fribidi_test.c"
+			CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${FRIBIDI_INCLUDE_DIR}"
+	)
+
+	file(REMOVE "${CMAKE_BINARY_DIR}/fribidi_test.c")
+
+  endif(FOUND_fribidi_charset_to_unicode AND NOT FOUND_FRIBIDI_CHAR_SET_UTF8)
+
+  if(FOUND_fribidi_charset_to_unicode AND FOUND_FRIBIDI_CHAR_SET_UTF8)
+    # fribidi >= 0.10.5
+    SET(FRIBIDI_LIBRARIES ${FRIBIDI_LIBRARY})
+    SET(FRIBIDI_FOUND "YES")
+  elseif(FOUND_fribidi_utf8_to_unicode)
+    # fribidi <= 0.10.4
+    SET(FRIBIDI_LIBRARIES ${FRIBIDI_LIBRARY})
+    SET(FRIBIDI_FOUND "YES")
+    add_definitions(-DOLD_FRIBIDI)
+    MESSAGE(STATUS "Legacy FriBiDi: ${FRIBIDI_LIBRARY}")
+  else()
+    SET(FRIBIDI_LIBRARIES "NOTFOUND")
+    SET(FRIBIDI_INCLUDE_DIR "NOTFOUND")
+    SET(FRIBIDI_FOUND "NO")
+  endif()
+ENDIF (FRIBIDI_LIBRARY AND FRIBIDI_INCLUDE_DIR)
+
+IF (FRIBIDI_FOUND)
+
+  IF (NOT FRIBIDI_FIND_QUIETLY)
+    MESSAGE(STATUS "Using FriBiDi: ${FRIBIDI_LIBRARY}")
+  ENDIF (NOT FRIBIDI_FIND_QUIETLY)
+ELSE (FRIBIDI_FOUND)
+  IF (FRIBIDI_FIND_REQUIRED)
+    MESSAGE(FATAL_ERROR "Could not find FriBiDi library")
+  ENDIF (FRIBIDI_FIND_REQUIRED)
+ENDIF (FRIBIDI_FOUND)
+