- added hint if segfault on highly corrupted tiff files

README.compile

@@ -1,10 +1,11 @@
 # You need an installed cmake
 ########################################################
 # compiling under linux
+# HINT: use "-fstack-check" if you expect highly corrupted TIFF-files
 ########################################################
 mkdir build
 cd build
-cmake ../src/ -DCMAKE_C_FLAGS="-W -Wall -Wextra -ansi -pedantic -O2 -Wno-unused-function"
+cmake ../src/ -DCMAKE_C_FLAGS="-W -Wall -Wextra -ansi -pedantic -O3 -Wno-unused-function -fstack-check"
 make
 ###
 # if you want to allow preferred CMM type "LINO", you should use the cmake-call