Update the code that import the builtins include

Take the change from the woboq codebrowser

src/CMakeLists.txt

@@ -54,16 +54,29 @@ if (APPLE)
 endif()
 
 
-
 # Embed the clang header into the binary:
 exec_program(${LLVM_CONFIG_EXECUTABLE} ARGS --version      OUTPUT_VARIABLE LLVM_VERSION )
 string(REPLACE "svn" "" LLVM_VERSION "${LLVM_VERSION}")
-file(GLOB BUILTINS_HEADERS "${LLVM_BIN_DIR}/../lib/clang/${LLVM_VERSION}/include/*.h")
+string(REGEX REPLACE "git.*$" "" LLVM_VERSION "${LLVM_VERSION}")
+if(NOT CLANG_BUILTIN_HEADERS_DIR)
+    set(CLANG_BUILTIN_HEADERS_DIR "${LLVM_BIN_DIR}/../lib/clang/${LLVM_VERSION}/include")
+endif()
+file(GLOB BUILTINS_HEADERS "${CLANG_BUILTIN_HEADERS_DIR}/*.h")
+if(NOT BUILTINS_HEADERS)
+    message(FATAL_ERROR "Could not find any clang builtins headers in ${CLANG_BUILTIN_HEADERS_DIR}")
+endif()
 foreach(BUILTIN_HEADER ${BUILTINS_HEADERS})
-    file(READ ${BUILTIN_HEADER} BINARY_DATA HEX)
-    string(REGEX REPLACE "(..)" "\\\\x\\1" BINARY_DATA "${BINARY_DATA}")
-    string(REPLACE "${LLVM_BIN_DIR}/../lib/clang/${LLVM_VERSION}/include/" "/builtins/" FN "${BUILTIN_HEADER}"  )
-    set(EMBEDDED_DATA "${EMBEDDED_DATA} { \"${FN}\" , \"${BINARY_DATA}\" } , ")
+    #filter files that are way to big
+    if(NOT BUILTIN_HEADER MATCHES ".*/(arm_neon.h|altivec.h|vecintrin.h|avx512.*intrin.h)")
+        file(READ ${BUILTIN_HEADER} BINARY_DATA)
+        string(REPLACE "\\" "\\\\" BINARY_DATA "${BINARY_DATA}")
+        string(REPLACE "\"" "\\\"" BINARY_DATA "${BINARY_DATA}")
+        string(REPLACE "\n" "\\n\"\n\"" BINARY_DATA "${BINARY_DATA}")
+        #workaround the fact that stdint.h includes itself
+        string(REPLACE "__CLANG_STDINT_H" "__CLANG_STDINT_H2" BINARY_DATA "${BINARY_DATA}")
+        string(REPLACE "${CLANG_BUILTIN_HEADERS_DIR}/" "/builtins/" FN "${BUILTIN_HEADER}"  )
+        set(EMBEDDED_DATA "${EMBEDDED_DATA} { \"${FN}\" , \"${BINARY_DATA}\" } , \n")
+    endif()
 endforeach()
 
 configure_file(embedded_includes.h.in embedded_includes.h)