[mathtext] isolate from ROOT and sync with upstream

CMakeLists.txt

@@ -403,7 +403,6 @@ add_subdirectory (hist)
 add_subdirectory (tree)
 add_subdirectory (io)
 add_subdirectory (net)
-add_subdirectory (builtins/mathtext) # hard coded builtin for graf2d
 add_subdirectory (graf2d)
 add_subdirectory (graf3d)
 if(NOT minimal)

builtins/mathtext/CMakeLists.txt → builtins/libmathtext/CMakeLists.txt

@@ -4,23 +4,23 @@
 # For the licensing terms see $ROOTSYS/LICENSE.
 # For the list of contributors see $ROOTSYS/README/CREDITS.
 
-ROOT_LINKER_LIBRARY(mathtext
+add_library(mathtext STATIC
   fontembed.cc
+  fontembedpdf.cc
   fontembedps.cc
+  geometry.cc
   mathrender.cc
   mathrenderstyle.cc
   mathrendertoken.cc
   mathtext.cc
   mathtextencode.cc
   mathtextparse.cc
   mathtextview.cc
-  TYPE
-    STATIC
-  NOINSTALL
 )
+target_include_directories(mathtext PUBLIC ./)
 
 check_cxx_compiler_flag(-Wbidi-chars=none GCC_HAS_BIDI_CHARS_FLAG)
 if(GCC_HAS_BIDI_CHARS_FLAG)
-    set_source_files_properties(src/fontembed.cc COMPILE_FLAGS "-Wbidi-chars=none")
+    set_source_files_properties(fontembed.cc COMPILE_FLAGS "-Wbidi-chars=none")
 endif()
 set_property(TARGET mathtext PROPERTY POSITION_INDEPENDENT_CODE ON)