Update CMakeLists.txt

Author: ferdymercury

misc/minicern/CMakeLists.txt

@@ -11,6 +11,6 @@
 ROOT_LINKER_LIBRARY(minicern *.c *.f TYPE STATIC)
 set_property(TARGET minicern PROPERTY POSITION_INDEPENDENT_CODE ON)
 target_link_libraries(minicern ${CMAKE_Fortran_IMPLICIT_LINK_LIBRARIES})
-set_target_properties(minicern PROPERTIES COMPILE_FLAGS "-Wall -fc-prototypes")
+set_target_properties(minicern PROPERTIES COMPILE_FLAGS "-Wall -Wextra")
 # set_target_properties(minicern PROPERTIES COMPILE_FLAGS "-fsanitize=undefined -fsanitize=address") # TODO enabling this shows issues
 # target_link_options(minicern BEFORE PUBLIC -fsanitize=undefined PUBLIC -fsanitize=address) # TODO enabling this shows issues