diff --git a/src/target/algorithm.h b/src/target/algorithm.h
index 15e3cf22f..600580cb7 100644
--- a/src/target/algorithm.h
+++ b/src/target/algorithm.h
@@ -45,9 +45,12 @@ typedef struct reg_param_s
 	enum param_direction direction;
 } reg_param_t;
 
-extern void init_mem_param(mem_param_t *param, uint32_t address, uint32_t size, enum param_direction direction);
-extern void destroy_mem_param(mem_param_t *param);
-extern void init_reg_param(reg_param_t *param, char *reg_name, uint32_t size, enum param_direction direction);
-extern void destroy_reg_param(reg_param_t *param);
+void init_mem_param(mem_param_t *param,
+		uint32_t address, uint32_t size, enum param_direction dir);
+void destroy_mem_param(mem_param_t *param);
+
+void init_reg_param(reg_param_t *param,
+		char *reg_name, uint32_t size, enum param_direction dir);
+void destroy_reg_param(reg_param_t *param);
 
 #endif /* ALGORITHM_H */
diff --git a/src/target/arm926ejs.h b/src/target/arm926ejs.h
index 01e3c090c..0712c535a 100644
--- a/src/target/arm926ejs.h
+++ b/src/target/arm926ejs.h
@@ -46,10 +46,12 @@ target_to_arm926(struct target_s *target)
 }
 
 
-extern int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, jtag_tap_t *tap);
-extern int arm926ejs_register_commands(struct command_context_s *cmd_ctx);
-extern int arm926ejs_arch_state(struct target_s *target);
-extern int arm926ejs_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-extern int arm926ejs_soft_reset_halt(struct target_s *target);
+int arm926ejs_init_arch_info(target_t *target,
+		arm926ejs_common_t *arm926ejs, jtag_tap_t *tap);
+int arm926ejs_register_commands(struct command_context_s *cmd_ctx);
+int arm926ejs_arch_state(struct target_s *target);
+int arm926ejs_write_memory(struct target_s *target,
+		uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+int arm926ejs_soft_reset_halt(struct target_s *target);
 
 #endif /* ARM926EJS_H */
diff --git a/src/target/arm966e.h b/src/target/arm966e.h
index e8346f9d4..8d0ee5016 100644
--- a/src/target/arm966e.h
+++ b/src/target/arm966e.h
@@ -41,8 +41,9 @@ target_to_arm966(struct target_s *target)
 			arm9tdmi_common.arm7_9_common.armv4_5_common);
 }
 
-extern int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap);
-extern int arm966e_register_commands(struct command_context_s *cmd_ctx);
-extern int arm966e_write_cp15(target_t *target, int reg_addr, uint32_t value);
+int arm966e_init_arch_info(target_t *target,
+		arm966e_common_t *arm966e, jtag_tap_t *tap);
+int arm966e_register_commands(struct command_context_s *cmd_ctx);
+int arm966e_write_cp15(target_t *target, int reg_addr, uint32_t value);
 
 #endif /* ARM966E_H */
diff --git a/src/target/arm9tdmi.h b/src/target/arm9tdmi.h
index 8bf2713e8..c098d8225 100644
--- a/src/target/arm9tdmi.h
+++ b/src/target/arm9tdmi.h
@@ -51,34 +51,34 @@ enum arm9tdmi_vector
 	ARM9TDMI_FIQ_VECTOR = 0x80,
 };
 
-extern int arm9tdmi_init_target(struct command_context_s *cmd_ctx,
-	struct target_s *target);
+int arm9tdmi_init_target(struct command_context_s *cmd_ctx,
+		struct target_s *target);
 int arm9tdmi_examine(struct target_s *target);
-extern int arm9tdmi_init_arch_info(target_t *target,
-	arm9tdmi_common_t *arm9tdmi, jtag_tap_t *tap);
-extern int arm9tdmi_register_commands(struct command_context_s *cmd_ctx);
+int arm9tdmi_init_arch_info(target_t *target,
+		arm9tdmi_common_t *arm9tdmi, jtag_tap_t *tap);
+int arm9tdmi_register_commands(struct command_context_s *cmd_ctx);
 
-extern int arm9tdmi_clock_out(arm_jtag_t *jtag_info,
-	uint32_t instr, uint32_t out, uint32_t *in, int sysspeed);
-extern int arm9tdmi_clock_data_in(arm_jtag_t *jtag_info, uint32_t *in);
-extern int arm9tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info,
-	void *in, int size, int be);
-extern void arm9tdmi_read_core_regs(target_t *target,
-	uint32_t mask, uint32_t* core_regs[16]);
-extern void arm9tdmi_write_core_regs(target_t *target,
-	uint32_t mask, uint32_t core_regs[16]);
+int arm9tdmi_clock_out(arm_jtag_t *jtag_info,
+		uint32_t instr, uint32_t out, uint32_t *in, int sysspeed);
+int arm9tdmi_clock_data_in(arm_jtag_t *jtag_info, uint32_t *in);
+int arm9tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info,
+		void *in, int size, int be);
+void arm9tdmi_read_core_regs(target_t *target,
+		uint32_t mask, uint32_t* core_regs[16]);
+void arm9tdmi_write_core_regs(target_t *target,
+		uint32_t mask, uint32_t core_regs[16]);
 
-extern int arm9tdmi_examine_debug_reason(target_t *target);
+int arm9tdmi_examine_debug_reason(target_t *target);
 
-extern void arm9tdmi_load_word_regs(target_t *target, uint32_t mask);
-extern void arm9tdmi_load_hword_reg(target_t *target, int num);
-extern void arm9tdmi_load_byte_reg(target_t *target, int num);
-extern void arm9tdmi_store_word_regs(target_t *target, uint32_t mask);
-extern void arm9tdmi_store_hword_reg(target_t *target, int num);
-extern void arm9tdmi_store_byte_reg(target_t *target, int num);
+void arm9tdmi_load_word_regs(target_t *target, uint32_t mask);
+void arm9tdmi_load_hword_reg(target_t *target, int num);
+void arm9tdmi_load_byte_reg(target_t *target, int num);
+void arm9tdmi_store_word_regs(target_t *target, uint32_t mask);
+void arm9tdmi_store_hword_reg(target_t *target, int num);
+void arm9tdmi_store_byte_reg(target_t *target, int num);
 
-extern void arm9tdmi_branch_resume(target_t *target);
-extern void arm9tdmi_enable_single_step(target_t *target, uint32_t next_pc);
-extern void arm9tdmi_disable_single_step(target_t *target);
+void arm9tdmi_branch_resume(target_t *target);
+void arm9tdmi_enable_single_step(target_t *target, uint32_t next_pc);
+void arm9tdmi_disable_single_step(target_t *target);
 
 #endif /* ARM9TDMI_H */
diff --git a/src/target/arm_adi_v5.h b/src/target/arm_adi_v5.h
index 3ff883af7..442b45ca7 100644
--- a/src/target/arm_adi_v5.h
+++ b/src/target/arm_adi_v5.h
@@ -111,39 +111,48 @@ static inline uint8_t dap_ap_get_select(swjdp_common_t *swjdp)
 }
 
 /* Internal functions used in the module, partial transactions, use with caution */
-extern int dap_dp_write_reg(swjdp_common_t *swjdp, uint32_t value, uint8_t reg_addr);
-/* extern int swjdp_write_apacc(swjdp_common_t *swjdp, uint32_t value, uint8_t reg_addr); */
-extern int dap_dp_read_reg(swjdp_common_t *swjdp, uint32_t *value, uint8_t reg_addr);
-/* extern int swjdp_read_apacc(swjdp_common_t *swjdp, uint32_t *value, uint8_t reg_addr); */
-extern int dap_setup_accessport(swjdp_common_t *swjdp, uint32_t csw, uint32_t tar);
-extern int dap_ap_select(swjdp_common_t *swjdp,uint8_t apsel);
+int dap_dp_write_reg(swjdp_common_t *swjdp, uint32_t value, uint8_t reg_addr);
+/* int swjdp_write_apacc(swjdp_common_t *swjdp, uint32_t value, uint8_t reg_addr); */
+int dap_dp_read_reg(swjdp_common_t *swjdp, uint32_t *value, uint8_t reg_addr);
+/* int swjdp_read_apacc(swjdp_common_t *swjdp, uint32_t *value, uint8_t reg_addr); */
+int dap_setup_accessport(swjdp_common_t *swjdp, uint32_t csw, uint32_t tar);
+int dap_ap_select(swjdp_common_t *swjdp,uint8_t apsel);
 
-extern int dap_ap_write_reg(swjdp_common_t *swjdp, uint32_t reg_addr, uint8_t* out_value_buf);
-extern int dap_ap_write_reg_u32(swjdp_common_t *swjdp, uint32_t reg_addr, uint32_t value);
-extern int dap_ap_read_reg(swjdp_common_t *swjdp, uint32_t reg_addr, uint8_t *in_value_buf);
-extern int dap_ap_read_reg_u32(swjdp_common_t *swjdp, uint32_t reg_addr, uint32_t *value);
+int dap_ap_write_reg(swjdp_common_t *swjdp, uint32_t addr, uint8_t* out_buf);
+int dap_ap_write_reg_u32(swjdp_common_t *swjdp, uint32_t addr, uint32_t value);
+int dap_ap_read_reg(swjdp_common_t *swjdp, uint32_t addr, uint8_t *in_buf);
+int dap_ap_read_reg_u32(swjdp_common_t *swjdp, uint32_t addr, uint32_t *value);
 
 /* External interface, partial operations must be completed with swjdp_transaction_endcheck() */
-extern int swjdp_transaction_endcheck(swjdp_common_t *swjdp);
+int swjdp_transaction_endcheck(swjdp_common_t *swjdp);
 
 /* MEM-AP memory mapped bus single uint32_t register transfers, without endcheck */
-extern int mem_ap_read_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t *value);
-extern int mem_ap_write_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t value);
+int mem_ap_read_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t *value);
+int mem_ap_write_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t value);
 
 /* MEM-AP memory mapped bus transfers, single registers, complete transactions */
-extern int mem_ap_read_atomic_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t *value);
-extern int mem_ap_write_atomic_u32(swjdp_common_t *swjdp, uint32_t address, uint32_t value);
+int mem_ap_read_atomic_u32(swjdp_common_t *swjdp,
+		uint32_t address, uint32_t *value);
+int mem_ap_write_atomic_u32(swjdp_common_t *swjdp,
+		uint32_t address, uint32_t value);
 
 /* MEM-AP memory mapped bus block transfers */
-extern int mem_ap_read_buf_u8(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
-extern int mem_ap_read_buf_u16(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
-extern int mem_ap_read_buf_u32(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
-extern int mem_ap_write_buf_u8(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
-extern int mem_ap_write_buf_u16(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
-extern int mem_ap_write_buf_u32(swjdp_common_t *swjdp, uint8_t *buffer, int count, uint32_t address);
+int mem_ap_read_buf_u8(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
+int mem_ap_read_buf_u16(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
+int mem_ap_read_buf_u32(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
+
+int mem_ap_write_buf_u8(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
+int mem_ap_write_buf_u16(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
+int mem_ap_write_buf_u32(swjdp_common_t *swjdp,
+		uint8_t *buffer, int count, uint32_t address);
 
 /* Initialisation of the debug system, power domains and registers */
-extern int ahbap_debugport_init(swjdp_common_t *swjdp);
+int ahbap_debugport_init(swjdp_common_t *swjdp);
 
 
 /* Commands for user dap access */
diff --git a/src/target/arm_disassembler.h b/src/target/arm_disassembler.h
index b841d6cd0..8021e7c34 100644
--- a/src/target/arm_disassembler.h
+++ b/src/target/arm_disassembler.h
@@ -197,11 +197,13 @@ typedef struct arm_instruction_s
 
 } arm_instruction_t;
 
-extern int arm_evaluate_opcode(uint32_t opcode, uint32_t address, arm_instruction_t *instruction);
-extern int thumb_evaluate_opcode(uint16_t opcode, uint32_t address, arm_instruction_t *instruction);
-extern int thumb2_opcode(target_t *target, uint32_t address,
+int arm_evaluate_opcode(uint32_t opcode, uint32_t address,
 		arm_instruction_t *instruction);
-extern int arm_access_size(arm_instruction_t *instruction);
+int thumb_evaluate_opcode(uint16_t opcode, uint32_t address,
+		arm_instruction_t *instruction);
+int thumb2_opcode(target_t *target, uint32_t address,
+		arm_instruction_t *instruction);
+int arm_access_size(arm_instruction_t *instruction);
 
 #define COND(opcode) (arm_condition_strings[(opcode & 0xf0000000) >> 28])
 
diff --git a/src/target/arm_jtag.h b/src/target/arm_jtag.h
index f4b04e88f..c7d12cba7 100644
--- a/src/target/arm_jtag.h
+++ b/src/target/arm_jtag.h
@@ -36,9 +36,10 @@ typedef struct arm_jtag_s
 	uint32_t intest_instr;
 } arm_jtag_t;
 
-extern int arm_jtag_set_instr(arm_jtag_t *jtag_info, uint32_t new_instr, void *verify_capture);
-extern int arm_jtag_scann(arm_jtag_t *jtag_info, uint32_t new_scan_chain);
-extern int arm_jtag_setup_connection(arm_jtag_t *jtag_info);
+int arm_jtag_set_instr(arm_jtag_t *jtag_info,
+		uint32_t new_instr, void *verify_capture);
+int arm_jtag_scann(arm_jtag_t *jtag_info, uint32_t new_scan_chain);
+int arm_jtag_setup_connection(arm_jtag_t *jtag_info);
 
 /* JTAG buffers to host, be and le buffers, flipping variants */
 int arm_jtag_buf_to_u32_flip(uint8_t *in_buf, void *priv, struct scan_field_s *field);
diff --git a/src/target/arm_simulator.h b/src/target/arm_simulator.h
index bad904bac..9e7b0400c 100644
--- a/src/target/arm_simulator.h
+++ b/src/target/arm_simulator.h
@@ -37,12 +37,11 @@ struct arm_sim_interface
 	enum armv4_5_mode (*get_mode)(struct arm_sim_interface *sim);
 };
 
-
 /* armv4_5 version */
-extern int arm_simulate_step(struct target_s *target, uint32_t *dry_run_pc);
+int arm_simulate_step(struct target_s *target, uint32_t *dry_run_pc);
 
 /* a generic arm simulator. Caller must implement the sim interface */
-extern int arm_simulate_step_core(target_t *target, uint32_t *dry_run_pc, struct arm_sim_interface *sim);
-
+int arm_simulate_step_core(target_t *target,
+		uint32_t *dry_run_pc, struct arm_sim_interface *sim);
 
 #endif /* ARM_SIMULATOR_H */
diff --git a/src/target/armv4_5.h b/src/target/armv4_5.h
index fb7926b66..d76ce7592 100644
--- a/src/target/armv4_5.h
+++ b/src/target/armv4_5.h
@@ -108,7 +108,8 @@ typedef struct armv4_5_core_reg_s
 	armv4_5_common_t *armv4_5_common;
 } armv4_5_core_reg_t;
 
-extern reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5_common);
+reg_cache_t* armv4_5_build_reg_cache(target_t *target,
+		armv4_5_common_t *armv4_5_common);
 
 /* map psr mode bits to linear number */
 static __inline int armv4_5_mode_to_number(enum armv4_5_mode mode)
@@ -147,15 +148,20 @@ static __inline enum armv4_5_mode armv4_5_number_to_mode(int number)
 	}
 };
 
-extern int armv4_5_arch_state(struct target_s *target);
-extern int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size);
+int armv4_5_arch_state(struct target_s *target);
+int armv4_5_get_gdb_reg_list(target_t *target,
+		reg_t **reg_list[], int *reg_list_size);
 
-extern int armv4_5_register_commands(struct command_context_s *cmd_ctx);
-extern int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5);
+int armv4_5_register_commands(struct command_context_s *cmd_ctx);
+int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5);
 
-extern int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info);
+int armv4_5_run_algorithm(struct target_s *target,
+		int num_mem_params, mem_param_t *mem_params,
+		int num_reg_params, reg_param_t *reg_params,
+		uint32_t entry_point, uint32_t exit_point,
+		int timeout_ms, void *arch_info);
 
-extern int armv4_5_invalidate_core_regs(target_t *target);
+int armv4_5_invalidate_core_regs(target_t *target);
 
 /* ARM mode instructions
  */
diff --git a/src/target/armv4_5_cache.h b/src/target/armv4_5_cache.h
index 44bc212e0..71e3203c0 100644
--- a/src/target/armv4_5_cache.h
+++ b/src/target/armv4_5_cache.h
@@ -42,10 +42,13 @@ typedef struct armv4_5_cache_common_s
 	int d_u_cache_enabled;
 } armv4_5_cache_common_t;
 
-extern int armv4_5_identify_cache(uint32_t cache_type_reg, armv4_5_cache_common_t *cache);
-extern int armv4_5_cache_state(uint32_t cp15_control_reg, armv4_5_cache_common_t *cache);
+int armv4_5_identify_cache(uint32_t cache_type_reg,
+		armv4_5_cache_common_t *cache);
+int armv4_5_cache_state(uint32_t cp15_control_reg,
+		armv4_5_cache_common_t *cache);
 
-extern int armv4_5_handle_cache_info_command(struct command_context_s *cmd_ctx, armv4_5_cache_common_t *armv4_5_cache);
+int armv4_5_handle_cache_info_command(struct command_context_s *cmd_ctx,
+		armv4_5_cache_common_t *armv4_5_cache);
 
 enum
 {
diff --git a/src/target/armv4_5_mmu.h b/src/target/armv4_5_mmu.h
index 0c9b55011..b0c39a7a3 100644
--- a/src/target/armv4_5_mmu.h
+++ b/src/target/armv4_5_mmu.h
@@ -42,9 +42,17 @@ enum
 
 extern char* armv4_5_page_type_names[];
 
-extern uint32_t armv4_5_mmu_translate_va(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, uint32_t va, int *type, uint32_t *cb, int *domain, uint32_t *ap);
-extern int armv4_5_mmu_read_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-extern int armv4_5_mmu_write_physical(target_t *target, armv4_5_mmu_common_t *armv4_5_mmu, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+uint32_t armv4_5_mmu_translate_va(target_t *target,
+		armv4_5_mmu_common_t *armv4_5_mmu, uint32_t va, int *type,
+		uint32_t *cb, int *domain, uint32_t *ap);
+
+int armv4_5_mmu_read_physical(target_t *target,
+		armv4_5_mmu_common_t *armv4_5_mmu,
+		uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+
+int armv4_5_mmu_write_physical(target_t *target,
+		armv4_5_mmu_common_t *armv4_5_mmu,
+		uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
 
 enum
 {
diff --git a/src/target/armv7m.h b/src/target/armv7m.h
index 217f0e38c..760168562 100644
--- a/src/target/armv7m.h
+++ b/src/target/armv7m.h
@@ -50,7 +50,7 @@ enum armv7m_regtype
 	ARMV7M_REGISTER_MEMMAP
 };
 
-extern char *armv7m_exception_string(int number);
+char *armv7m_exception_string(int number);
 
 /* offsets into armv7m core register cache */
 enum
@@ -134,24 +134,31 @@ typedef struct armv7m_core_reg_s
 	armv7m_common_t *armv7m_common;
 } armv7m_core_reg_t;
 
-extern reg_cache_t *armv7m_build_reg_cache(target_t *target);
-extern enum armv7m_mode armv7m_number_to_mode(int number);
-extern int armv7m_mode_to_number(enum armv7m_mode mode);
+reg_cache_t *armv7m_build_reg_cache(target_t *target);
+enum armv7m_mode armv7m_number_to_mode(int number);
+int armv7m_mode_to_number(enum armv7m_mode mode);
 
-extern int armv7m_arch_state(struct target_s *target);
-extern int armv7m_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size);
+int armv7m_arch_state(struct target_s *target);
+int armv7m_get_gdb_reg_list(target_t *target,
+		reg_t **reg_list[], int *reg_list_size);
 
-extern int armv7m_register_commands(struct command_context_s *cmd_ctx);
-extern int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m);
+int armv7m_register_commands(struct command_context_s *cmd_ctx);
+int armv7m_init_arch_info(target_t *target, armv7m_common_t *armv7m);
 
-extern int armv7m_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info);
+int armv7m_run_algorithm(struct target_s *target,
+		int num_mem_params, mem_param_t *mem_params,
+		int num_reg_params, reg_param_t *reg_params,
+		uint32_t entry_point, uint32_t exit_point,
+		int timeout_ms, void *arch_info);
 
-extern int armv7m_invalidate_core_regs(target_t *target);
+int armv7m_invalidate_core_regs(target_t *target);
 
-extern int armv7m_restore_context(target_t *target);
+int armv7m_restore_context(target_t *target);
 
-extern int armv7m_checksum_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* checksum);
-extern int armv7m_blank_check_memory(struct target_s *target, uint32_t address, uint32_t count, uint32_t* blank);
+int armv7m_checksum_memory(struct target_s *target,
+		uint32_t address, uint32_t count, uint32_t* checksum);
+int armv7m_blank_check_memory(struct target_s *target,
+		uint32_t address, uint32_t count, uint32_t* blank);
 
 /* Thumb mode instructions
  */
diff --git a/src/target/breakpoints.h b/src/target/breakpoints.h
index 91459669e..781c91b6b 100644
--- a/src/target/breakpoints.h
+++ b/src/target/breakpoints.h
@@ -58,12 +58,17 @@ typedef struct watchpoint_s
 	int unique_id;
 } watchpoint_t;
 
-extern void breakpoint_clear_target(struct target_s *target);
-extern int breakpoint_add(struct target_s *target, uint32_t address, uint32_t length, enum breakpoint_type type);
-extern void breakpoint_remove(struct target_s *target, uint32_t address);
-extern breakpoint_t* breakpoint_find(struct target_s *target, uint32_t address);
-extern int watchpoint_add(struct target_s *target, uint32_t address, uint32_t length, enum watchpoint_rw rw, uint32_t value, uint32_t mask);
-extern void watchpoint_remove(struct target_s *target, uint32_t address);
-extern void watchpoint_clear_target(struct target_s *target);
+void breakpoint_clear_target(struct target_s *target);
+int breakpoint_add(struct target_s *target,
+		uint32_t address, uint32_t length, enum breakpoint_type type);
+void breakpoint_remove(struct target_s *target, uint32_t address);
+
+breakpoint_t* breakpoint_find(struct target_s *target, uint32_t address);
+
+void watchpoint_clear_target(struct target_s *target);
+int watchpoint_add(struct target_s *target,
+		uint32_t address, uint32_t length,
+		enum watchpoint_rw rw, uint32_t value, uint32_t mask);
+void watchpoint_remove(struct target_s *target, uint32_t address);
 
 #endif /* BREAKPOINTS_H */
diff --git a/src/target/cortex_a8.h b/src/target/cortex_a8.h
index b4cb32753..42cb0624d 100644
--- a/src/target/cortex_a8.h
+++ b/src/target/cortex_a8.h
@@ -143,8 +143,13 @@ target_to_cortex_a8(struct target_s *target)
 			armv7a_common.armv4_5_common);
 }
 
-extern int cortex_a8_init_arch_info(target_t *target, cortex_a8_common_t *cortex_a8, jtag_tap_t *tap);
-int cortex_a8_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-int cortex_a8_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+int cortex_a8_init_arch_info(target_t *target,
+		cortex_a8_common_t *cortex_a8, jtag_tap_t *tap);
+int cortex_a8_read_memory(struct target_s *target,
+		uint32_t address, uint32_t size,
+		uint32_t count, uint8_t *buffer);
+int cortex_a8_write_memory(struct target_s *target,
+		uint32_t address, uint32_t size,
+		uint32_t count, uint8_t *buffer);
 
 #endif /* CORTEX_A8_H */
diff --git a/src/target/embeddedice.h b/src/target/embeddedice.h
index 08e42c926..b1ba98955 100644
--- a/src/target/embeddedice.h
+++ b/src/target/embeddedice.h
@@ -93,17 +93,25 @@ typedef struct embeddedice_reg_s
 	arm_jtag_t *jtag_info;
 } embeddedice_reg_t;
 
-extern reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm7_9_common_t *arm7_9);
-extern int embeddedice_setup(target_t *target);
-extern int embeddedice_read_reg(reg_t *reg);
-extern void embeddedice_write_reg(reg_t *reg, uint32_t value);
-extern int embeddedice_read_reg_w_check(reg_t *reg, uint8_t* check_value, uint8_t* check_mask);
-extern void embeddedice_store_reg(reg_t *reg);
-extern void embeddedice_set_reg(reg_t *reg, uint32_t value);
-extern int embeddedice_set_reg_w_exec(reg_t *reg, uint8_t *buf);
-extern int embeddedice_receive(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size);
-extern int embeddedice_send(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size);
-extern int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, uint32_t timeout);
+reg_cache_t* embeddedice_build_reg_cache(target_t *target,
+		arm7_9_common_t *arm7_9);
+
+int embeddedice_setup(target_t *target);
+
+int embeddedice_read_reg(reg_t *reg);
+int embeddedice_read_reg_w_check(reg_t *reg,
+		uint8_t* check_value, uint8_t* check_mask);
+
+void embeddedice_write_reg(reg_t *reg, uint32_t value);
+void embeddedice_store_reg(reg_t *reg);
+
+void embeddedice_set_reg(reg_t *reg, uint32_t value);
+int embeddedice_set_reg_w_exec(reg_t *reg, uint8_t *buf);
+
+int embeddedice_receive(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size);
+int embeddedice_send(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size);
+
+int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, uint32_t timeout);
 
 /* If many embeddedice_write_reg() follow eachother, then the >1 invocations can be this faster version of
  * embeddedice_write_reg
diff --git a/src/target/etb.h b/src/target/etb.h
index 0eeb02bde..cc58b659a 100644
--- a/src/target/etb.h
+++ b/src/target/etb.h
@@ -56,6 +56,6 @@ typedef struct etb_reg_s
 
 extern etm_capture_driver_t etb_capture_driver;
 
-extern reg_cache_t* etb_build_reg_cache(etb_t *etb);
+reg_cache_t* etb_build_reg_cache(etb_t *etb);
 
 #endif /* ETB_H */
diff --git a/src/target/etm.h b/src/target/etm.h
index b2426c749..c751aac46 100644
--- a/src/target/etm.h
+++ b/src/target/etm.h
@@ -200,8 +200,10 @@ typedef enum
 	BR_RSVD7   = 0x7, /* reserved */
 } etmv1_branch_reason_t;
 
-extern reg_cache_t* etm_build_reg_cache(target_t *target, arm_jtag_t *jtag_info, etm_context_t *etm_ctx);
-extern int etm_setup(target_t *target);
+reg_cache_t* etm_build_reg_cache(target_t *target,
+		arm_jtag_t *jtag_info, etm_context_t *etm_ctx);
+
+int etm_setup(target_t *target);
 
 int etm_register_commands(struct command_context_s *cmd_ctx);
 
diff --git a/src/target/image.h b/src/target/image.h
index 551524e30..8b70b3b1e 100644
--- a/src/target/image.h
+++ b/src/target/image.h
@@ -100,12 +100,16 @@ typedef struct image_mot_s
 	uint8_t *buffer;
 } image_mot_t;
 
-extern int image_open(image_t *image, char *url, char *type_string);
-extern int image_read_section(image_t *image, int section, uint32_t offset, uint32_t size, uint8_t *buffer, uint32_t *size_read);
-extern void image_close(image_t *image);
-extern int image_add_section(image_t *image, uint32_t base, uint32_t size, int flags, uint8_t *data);
+int image_open(image_t *image, char *url, char *type_string);
+int image_read_section(image_t *image, int section, uint32_t offset,
+		uint32_t size, uint8_t *buffer, uint32_t *size_read);
+void image_close(image_t *image);
 
-extern int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes, uint32_t* checksum);
+int image_add_section(image_t *image, uint32_t base, uint32_t size,
+		int flags, uint8_t *data);
+
+int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes,
+		uint32_t* checksum);
 
 #define ERROR_IMAGE_FORMAT_ERROR	(-1400)
 #define ERROR_IMAGE_TYPE_UNKNOWN	(-1401)
diff --git a/src/target/mips32.h b/src/target/mips32.h
index bc88bc37c..005798d5d 100644
--- a/src/target/mips32.h
+++ b/src/target/mips32.h
@@ -124,18 +124,32 @@ typedef struct mips32_core_reg_s
 #define MIPS32_SDBBP				0x7000003F
 #define MIPS16_SDBBP 				0xE801
 
-extern int mips32_arch_state(struct target_s *target);
-extern int mips32_init_arch_info(target_t *target, mips32_common_t *mips32, jtag_tap_t *tap);
-extern int mips32_restore_context(target_t *target);
-extern int mips32_save_context(target_t *target);
-extern reg_cache_t *mips32_build_reg_cache(target_t *target);
-extern int mips32_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info);
-extern int mips32_configure_break_unit(struct target_s *target);
-extern int mips32_enable_interrupts(struct target_s *target, int enable);
-extern int mips32_examine(struct target_s *target);
+int mips32_arch_state(struct target_s *target);
 
-extern int mips32_register_commands(struct command_context_s *cmd_ctx);
-extern int mips32_invalidate_core_regs(target_t *target);
-extern int mips32_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size);
+int mips32_init_arch_info(target_t *target,
+		mips32_common_t *mips32, jtag_tap_t *tap);
+
+int mips32_restore_context(target_t *target);
+int mips32_save_context(target_t *target);
+
+reg_cache_t *mips32_build_reg_cache(target_t *target);
+
+int mips32_run_algorithm(struct target_s *target,
+		int num_mem_params, mem_param_t *mem_params,
+		int num_reg_params, reg_param_t *reg_params,
+		uint32_t entry_point, uint32_t exit_point,
+		int timeout_ms, void *arch_info);
+
+int mips32_configure_break_unit(struct target_s *target);
+
+int mips32_enable_interrupts(struct target_s *target, int enable);
+
+int mips32_examine(struct target_s *target);
+
+int mips32_register_commands(struct command_context_s *cmd_ctx);
+
+int mips32_invalidate_core_regs(target_t *target);
+int mips32_get_gdb_reg_list(target_t *target,
+		reg_t **reg_list[], int *reg_list_size);
 
 #endif	/*MIPS32_H*/
diff --git a/src/target/mips32_dmaacc.h b/src/target/mips32_dmaacc.h
index e44ddad2a..c8a64fb98 100644
--- a/src/target/mips32_dmaacc.h
+++ b/src/target/mips32_dmaacc.h
@@ -34,15 +34,23 @@
 
 #define RETRY_ATTEMPTS	0
 
-extern int mips32_dmaacc_read_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf);
-extern int mips32_dmaacc_write_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf);
+int mips32_dmaacc_read_mem(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int size, int count, void *buf);
+int mips32_dmaacc_write_mem(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int size, int count, void *buf);
 
-extern int mips32_dmaacc_read_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf);
-extern int mips32_dmaacc_read_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf);
-extern int mips32_dmaacc_read_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf);
+int mips32_dmaacc_read_mem8(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint8_t *buf);
+int mips32_dmaacc_read_mem16(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint16_t *buf);
+int mips32_dmaacc_read_mem32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint32_t *buf);
 
-extern int mips32_dmaacc_write_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf);
-extern int mips32_dmaacc_write_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf);
-extern int mips32_dmaacc_write_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf);
+int mips32_dmaacc_write_mem8(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint8_t *buf);
+int mips32_dmaacc_write_mem16(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint16_t *buf);
+int mips32_dmaacc_write_mem32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint32_t *buf);
 
 #endif
diff --git a/src/target/mips32_pracc.h b/src/target/mips32_pracc.h
index 8443f870e..866f6f505 100644
--- a/src/target/mips32_pracc.h
+++ b/src/target/mips32_pracc.h
@@ -37,22 +37,34 @@
 #define NEG16(v) (((~(v)) + 1) & 0xFFFF)
 /*#define NEG18(v) (((~(v)) + 1) & 0x3FFFF)*/
 
-extern int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf);
-extern int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf);
+int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int size, int count, void *buf);
+int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int size, int count, void *buf);
 
-extern int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf);
-extern int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf);
-extern int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf);
-extern int mips32_pracc_read_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf);
+int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint8_t *buf);
+int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint16_t *buf);
+int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint32_t *buf);
+int mips32_pracc_read_u32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, uint32_t *buf);
 
-extern int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf);
-extern int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf);
-extern int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf);
-extern int mips32_pracc_write_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf);
+int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint8_t *buf);
+int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint16_t *buf);
+int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, int count, uint32_t *buf);
+int mips32_pracc_write_u32(mips_ejtag_t *ejtag_info,
+		uint32_t addr, uint32_t *buf);
 
-extern int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, uint32_t *regs);
-extern int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, uint32_t *regs);
+int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, uint32_t *regs);
+int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, uint32_t *regs);
 
-extern int mips32_pracc_exec(mips_ejtag_t *ejtag_info, int code_len, uint32_t *code, int num_param_in, uint32_t *param_in, int num_param_out, uint32_t *param_out, int cycle);
+int mips32_pracc_exec(mips_ejtag_t *ejtag_info, int code_len, uint32_t *code,
+		int num_param_in, uint32_t *param_in,
+		int num_param_out, uint32_t *param_out, int cycle);
 
 #endif
diff --git a/src/target/mips_ejtag.h b/src/target/mips_ejtag.h
index 274392a85..69ede527c 100644
--- a/src/target/mips_ejtag.h
+++ b/src/target/mips_ejtag.h
@@ -111,15 +111,16 @@ typedef struct mips_ejtag_s
 	uint32_t ejtag_ctrl;
 } mips_ejtag_t;
 
-extern int mips_ejtag_set_instr(mips_ejtag_t *ejtag_info, int new_instr, void *delete_me_and_submit_patch);
-extern int mips_ejtag_enter_debug(mips_ejtag_t *ejtag_info);
-extern int mips_ejtag_exit_debug(mips_ejtag_t *ejtag_info);
-extern int mips_ejtag_get_impcode(mips_ejtag_t *ejtag_info, uint32_t *impcode);
-extern int mips_ejtag_get_idcode(mips_ejtag_t *ejtag_info, uint32_t *idcode);
-extern int mips_ejtag_drscan_32(mips_ejtag_t *ejtag_info, uint32_t *data);
+int mips_ejtag_set_instr(mips_ejtag_t *ejtag_info,
+		int new_instr, void *delete_me_and_submit_patch);
+int mips_ejtag_enter_debug(mips_ejtag_t *ejtag_info);
+int mips_ejtag_exit_debug(mips_ejtag_t *ejtag_info);
+int mips_ejtag_get_impcode(mips_ejtag_t *ejtag_info, uint32_t *impcode);
+int mips_ejtag_get_idcode(mips_ejtag_t *ejtag_info, uint32_t *idcode);
+int mips_ejtag_drscan_32(mips_ejtag_t *ejtag_info, uint32_t *data);
 
-extern int mips_ejtag_init(mips_ejtag_t *ejtag_info);
-extern int mips_ejtag_config_step(mips_ejtag_t *ejtag_info, int enable_step);
-extern int mips_ejtag_read_debug(mips_ejtag_t *ejtag_info, uint32_t* debug_reg);
+int mips_ejtag_init(mips_ejtag_t *ejtag_info);
+int mips_ejtag_config_step(mips_ejtag_t *ejtag_info, int enable_step);
+int mips_ejtag_read_debug(mips_ejtag_t *ejtag_info, uint32_t* debug_reg);
 
 #endif /* MIPS_EJTAG */
diff --git a/src/target/mips_m4k.h b/src/target/mips_m4k.h
index 8e81d8ffa..e11f06a12 100644
--- a/src/target/mips_m4k.h
+++ b/src/target/mips_m4k.h
@@ -35,17 +35,19 @@ typedef struct mips_m4k_common_s
 	mips32_common_t mips32_common;
 } mips_m4k_common_t;
 
-extern int mips_m4k_bulk_write_memory(struct target_s *target, uint32_t address, uint32_t count, uint8_t *buffer);
+int mips_m4k_bulk_write_memory(struct target_s *target,
+		uint32_t address, uint32_t count, uint8_t *buffer);
 
-extern void mips_m4k_enable_breakpoints(struct target_s *target);
-extern int mips_m4k_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-extern int mips_m4k_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-extern int mips_m4k_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-extern int mips_m4k_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
-extern int mips_m4k_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
-extern int mips_m4k_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
-extern int mips_m4k_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
-extern int mips_m4k_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint);
-extern void mips_m4k_enable_watchpoints(struct target_s *target);
+void mips_m4k_enable_breakpoints(struct target_s *target);
+int mips_m4k_set_breakpoint(struct target_s *target, breakpoint_t *bp);
+int mips_m4k_unset_breakpoint(struct target_s *target, breakpoint_t *bp);
+int mips_m4k_add_breakpoint(struct target_s *target, breakpoint_t *bp);
+int mips_m4k_remove_breakpoint(struct target_s *target, breakpoint_t *bp);
+
+void mips_m4k_enable_watchpoints(struct target_s *target);
+int mips_m4k_set_watchpoint(struct target_s *target, watchpoint_t *wp);
+int mips_m4k_unset_watchpoint(struct target_s *target, watchpoint_t *wp);
+int mips_m4k_add_watchpoint(struct target_s *target, watchpoint_t *wp);
+int mips_m4k_remove_watchpoint(struct target_s *target, watchpoint_t *wp);
 
 #endif	/*MIPS_M4K_H*/
diff --git a/src/target/register.h b/src/target/register.h
index d139379bb..e7904e580 100644
--- a/src/target/register.h
+++ b/src/target/register.h
@@ -62,10 +62,13 @@ typedef struct reg_arch_type_s
 	struct reg_arch_type_s *next;
 } reg_arch_type_t;
 
-extern reg_t* register_get_by_name(reg_cache_t *first, char *name, int search_all);
-extern reg_cache_t** register_get_last_cache_p(reg_cache_t **first);
-extern int register_reg_arch_type(int (*get)(reg_t *reg), int (*set)(reg_t *reg, uint8_t *buf));
-extern reg_arch_type_t* register_get_arch_type(int id);
-extern void register_init_dummy(reg_t *reg);
+reg_t* register_get_by_name(reg_cache_t *first, char *name, int search_all);
+reg_cache_t** register_get_last_cache_p(reg_cache_t **first);
+
+int register_reg_arch_type(int (*get)(reg_t *reg),
+		int (*set)(reg_t *reg, uint8_t *buf));
+reg_arch_type_t* register_get_arch_type(int id);
+
+void register_init_dummy(reg_t *reg);
 
 #endif /* REGISTER_H */
diff --git a/src/target/target_request.h b/src/target/target_request.h
index b457bd9de..433c5923c 100644
--- a/src/target/target_request.h
+++ b/src/target/target_request.h
@@ -42,8 +42,9 @@ typedef struct debug_msg_receiver_s
 	struct debug_msg_receiver_s *next;
 } debug_msg_receiver_t;
 
-extern int target_request(target_t *target, uint32_t request);
-extern int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target);
-extern int target_request_register_commands(struct command_context_s *cmd_ctx);
+int target_request(target_t *target, uint32_t request);
+int delete_debug_msg_receiver(struct command_context_s *cmd_ctx,
+		target_t *target);
+int target_request_register_commands(struct command_context_s *cmd_ctx);
 
 #endif /* TARGET_REQUEST_H */
diff --git a/src/target/trace.h b/src/target/trace.h
index 0a9ccc55f..f6615f599 100644
--- a/src/target/trace.h
+++ b/src/target/trace.h
@@ -51,8 +51,8 @@ typedef enum trace_status
 	TRACE_OVERFLOWED = 0x8,
 } trace_status_t;
 
-extern int trace_point(struct target_s *target, uint32_t number);
-extern int trace_register_commands(struct command_context_s *cmd_ctx);
+int trace_point(struct target_s *target, uint32_t number);
+int trace_register_commands(struct command_context_s *cmd_ctx);
 
 #define ERROR_TRACE_IMAGE_UNAVAILABLE		-(1500)
 #define ERROR_TRACE_INSTRUCTION_UNAVAILABLE	-(1501)