Index: gcc/common.opt
--- gcc/common.opt.orig
+++ gcc/common.opt
@@ -648,6 +648,10 @@ Wnull-dereference
 Common Var(warn_null_dereference) Warning
 Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior.
 
+Wstack-larger-than-
+Common RejectNegative Joined UInteger
+-Wstack-larger-than-<number> Warn if a function is using more than <number> bytes of stack space for its local variables.
+
 Wunsafe-loop-optimizations
 Common Ignore Warning
 Does nothing. Preserved for backward compatibility.
@@ -767,7 +771,7 @@ Warn about statements between switch's controlling exp
 case.
 
 Wsystem-headers
-Common Var(warn_system_headers) Warning
+Common Var(warn_system_headers) Init(1) Warning
 Do not suppress warnings from system headers.
 
 Wtrampolines
@@ -822,6 +826,10 @@ Wunused-variable
 Common Var(warn_unused_variable) Warning EnabledBy(Wunused)
 Warn when a variable is unused.
 
+Wvariable-decl
+Common Var(warn_variable_decl)
+Warn about variable-sized declarations
+
 Wcoverage-mismatch
 Common Var(warn_coverage_mismatch) Init(1) Warning
 Warn in case profiles in -fprofile-use do not match.
@@ -974,7 +982,7 @@ Common Joined RejectNegative UInteger Var(flag_abi_ver
 The version of the C++ ABI in use.
 
 faggressive-loop-optimizations
-Common Var(flag_aggressive_loop_optimizations) Optimization Init(1)
+Common Var(flag_aggressive_loop_optimizations) Optimization
 Aggressively optimize loops using language constraints.
 
 falign-functions
@@ -1244,7 +1252,7 @@ Common Var(flag_delete_dead_exceptions) Init(0) Optimi
 Delete dead instructions that may throw exceptions.
 
 fdelete-null-pointer-checks
-Common Var(flag_delete_null_pointer_checks) Init(-1) Optimization
+Common Var(flag_delete_null_pointer_checks) Init(0) Optimization
 Delete useless null pointer checks.
 
 fdevirtualize-at-ltrans
@@ -1703,7 +1711,7 @@ Enable guessing of branch probabilities.
 ; On SVR4 targets, it also controls whether or not to emit a
 ; string identifying the compiler.
 fident
-Common Var(flag_no_ident,0)
+Common Var(flag_no_ident,0) Init(1)
 Process #ident directives.
 
 fif-conversion
@@ -1783,7 +1791,7 @@ fcf-protection
 Common RejectNegative Alias(fcf-protection=,full)
 
 fcf-protection=
-Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_NONE)
+Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_DEFAULT)
 -fcf-protection=[full|branch|return|none|check]	Instrument functions with checks to verify jump/call/return control-flow transfer
 instructions have valid targets.
 
@@ -1941,7 +1949,7 @@ Common Var(flag_ivopts) Init(1) Optimization
 Optimize induction variables on trees.
 
 fjump-tables
-Common Var(flag_jump_tables) Init(1) Optimization
+Common Var(flag_jump_tables) Init(0) Optimization
 Use jump tables for sufficiently large switch statements.
 
 fbit-tests
@@ -2627,7 +2635,7 @@ Common RejectNegative Joined Var(common_deferred_optio
 -fstack-limit-symbol=<name>	Trap if the stack goes past symbol <name>.
 
 fstack-protector
-Common Var(flag_stack_protect, 1) Init(-1) Optimization
+Common Var(flag_stack_protect, 3) Init(-1) Optimization
 Use propolice as a stack protection method.
 
 fstack-protector-all
@@ -3308,6 +3316,9 @@ no-canonical-prefixes
 Driver
 
 nodefaultlibs
+Driver
+
+nopie
 Driver
 
 nostartfiles