build: restore check for minimum compiler version and enforce >= 13

Author: ppannuto

Helpers.mk

@@ -40,25 +40,12 @@ ifdef TOCK_USERLAND_BASE_DIR
     endif
 endif
 
-# # Validate the the toolchain is new enough (known not to work for gcc <= 5.1)
-# CC_VERSION_MAJOR := $(shell $(CC) -dumpversion | cut -d '.' -f1)
-# ifeq (1,$(shell expr $(CC_VERSION_MAJOR) \>= 6))
-#   # Opportunistically turn on gcc 6.0+ warnings since we're already version checking:
-#   override CPPFLAGS += -Wduplicated-cond #  if (p->q != NULL) { ... } else if (p->q != NULL) { ... }
-#   override CPPFLAGS += -Wnull-dereference # deref of NULL (thought default if -fdelete-null-pointer-checks, in -Os, but no?)
-# else
-#   ifneq (5,$(CC_VERSION_MAJOR))
-#     $(info CC=$(CC))
-#     $(info $$(CC) -dumpversion: $(shell $(CC) -dumpversion))
-#     $(error Your compiler is too old. Need gcc version > 5.1)
-#   endif
-#     CC_VERSION_MINOR := $(shell $(CC) -dumpversion | cut -d '.' -f2)
-#   ifneq (1,$(shell expr $(CC_VERSION_MINOR) \> 1))
-#     $(info CC=$(CC))
-#     $(info $$(CC) -dumpversion: $(shell $(CC) -dumpversion))
-#     $(error Your compiler is too old. Need gcc version > 5.1)
-#   endif
-# endif
+# Validate the the toolchain is new enough (known not to work for gcc <= 5.1)
+CC_VERSION_MAJOR := $(shell $(CC) -dumpversion | cut -d '.' -f1)
+ifneq (1,$(shell expr $(CC_VERSION_MAJOR) \>= 13))
+  $(info $(CC) -dumpversion: $(shell $(CC) -dumpversion))
+  $(error Your compiler is too old. Found version $(CC_VERSION_MAJOR). Need gcc version >= 13)
+endif
 
 
 # Format check rule