Fix -Wmissing-prototypes found by Clang

ftype-double.c:89:1: warning: no previous prototype for function 'val_unary_minus'
ftype-double.c:96:1: warning: no previous prototype for function 'val_add'
ftype-double.c:103:1: warning: no previous prototype for function 'val_subtract'
ftype-double.c:110:1: warning: no previous prototype for function 'val_multiply'
ftype-double.c:117:1: warning: no previous prototype for function 'val_divide'
ftype-integer.c:670:1: warning: no previous prototype for function 'uint_bitwise_and'
ftype-integer.c:677:1: warning: no previous prototype for function 'uint_is_zero'
ftype-integer.c:683:1: warning: no previous prototype for function 'uint_is_negative'
ftype-integer.c:689:1: warning: no previous prototype for function 'uint_unary_minus'
ftype-integer.c:704:1: warning: no previous prototype for function 'uint64_bitwise_and'
ftype-integer.c:711:1: warning: no previous prototype for function 'uint64_is_zero'
ftype-integer.c:717:1: warning: no previous prototype for function 'uint64_is_negative'
ftype-integer.c:723:1: warning: no previous prototype for function 'uint64_unary_minus'
ftype-integer.c:738:1: warning: no previous prototype for function 'sint_bitwise_and'
ftype-integer.c:745:1: warning: no previous prototype for function 'sint_is_zero'
ftype-integer.c:751:1: warning: no previous prototype for function 'sint_is_negative'
ftype-integer.c:757:1: warning: no previous prototype for function 'sint_unary_minus
ftype-integer.c:764:1: warning: no previous prototype for function 'sint64_bitwise_and'
ftype-integer.c:771:1: warning: no previous prototype for function 'sint64_is_zero'
ftype-integer.c:777:1: warning: no previous prototype for function 'sint64_is_negative'
ftype-integer.c:783:1: warning: no previous prototype for function 'sint64_unary_minus'
packet-bpv6.c:2182:1: warning: no previous prototype for function 'proto_register_bpv6'
packet-bpv6.c:2766:1: warning: no previous prototype for function 'proto_reg_handoff_bpv6'
packet-bpv7.c:1978:6: warning: no previous prototype for function 'proto_register_bpv7'
packet-bpv7.c:2037:6: warning: no previous prototype for function 'proto_reg_handoff_bpv7'
packet-realtek.c:349:1: warning: no previous prototype for function 'proto_register_realtek'
packet-realtek.c:436:1: warning: no previous prototype for function 'proto_reg_handoff_realtek'
packet-tcpcl.c:2147:1: warning: no previous prototype for function 'proto_register_tcpclv3'
packet-tcpcl.c:2211:1: warning: no previous prototype for function 'proto_reg_handoff_tcpclv3'

6 files changed, 17 insertions, 6 deletions

diff --git a/epan/dissectors/packet-bpv6.c b/epan/dissectors/packet-bpv6.c
index 45140f519e..a4e0f31cfd 100644
--- a/epan/dissectors/packet-bpv6.c
+++ b/epan/dissectors/packet-bpv6.c
@@ -47,6 +47,9 @@
 #include "packet-bpv6.h"
 #include "packet-cfdp.h"
 
+void proto_register_bpv6(void);
+void proto_reg_handoff_bpv6(void);
+
 static int dissect_admin_record(proto_tree *primary_tree, tvbuff_t *tvb, packet_info *pinfo,
                                 int offset, int payload_length, gboolean* success);
 
diff --git a/epan/dissectors/packet-bpv7.c b/epan/dissectors/packet-bpv7.c
index 3b00f03bbb..6a23b07f88 100644
--- a/epan/dissectors/packet-bpv7.c
+++ b/epan/dissectors/packet-bpv7.c
@@ -29,6 +29,9 @@
 #include <wsutil/utf8_entities.h>
 #include <inttypes.h>
 
+void proto_register_bpv7(void);
+void proto_reg_handoff_bpv7(void);
+
 /// Protocol column name
 static const char *const proto_name_bp = "BPv7";
 static const char *const proto_name_bp_admin = "BPv7 Admin";
diff --git a/epan/dissectors/packet-realtek.c b/epan/dissectors/packet-realtek.c
index 24550372b4..885b9c8226 100644
--- a/epan/dissectors/packet-realtek.c
+++ b/epan/dissectors/packet-realtek.c
@@ -18,6 +18,9 @@
 #include <epan/packet.h>
 #include <etypes.h>
 
+void proto_register_realtek(void);
+void proto_reg_handoff_realtek(void);
+
 #define RTL_PROTOCOL_RRCP    0x01    /* RRCP */
 #define RTL_PROTOCOL_REP     0x02    /* REP */
 #define RTL_PROTOCOL_RLDP    0x03    /* RLDP */
diff --git a/epan/dissectors/packet-tcpcl.c b/epan/dissectors/packet-tcpcl.c
index 8443041e74..02a2954375 100644
--- a/epan/dissectors/packet-tcpcl.c
+++ b/epan/dissectors/packet-tcpcl.c
@@ -53,6 +53,8 @@
 #include <epan/dissectors/packet-bpv6.h>
 #include "packet-tcpcl.h"
 
+void proto_register_tcpclv3(void);
+void proto_reg_handoff_tcpclv3(void);
 
 static const char magic[] = {'d', 't', 'n', '!'};
 
diff --git a/epan/ftypes/ftype-double.c b/epan/ftypes/ftype-double.c
index 07ed61fcd3..daf4875863 100644
--- a/epan/ftypes/ftype-double.c
+++ b/epan/ftypes/ftype-double.c
@@ -85,35 +85,35 @@ double_val_to_repr(wmem_allocator_t *scope, const fvalue_t *fv, ftrepr_t rtype _
 	return buf;
 }
 
-enum ft_result
+static enum ft_result
 val_unary_minus(fvalue_t * dst, const fvalue_t *src, char **err_ptr _U_)
 {
 	dst->value.floating = -src->value.floating;
 	return FT_OK;
 }
 
-enum ft_result
+static enum ft_result
 val_add(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
 {
 	dst->value.floating = a->value.floating + b->value.floating;
 	return FT_OK;
 }
 
-enum ft_result
+static enum ft_result
 val_subtract(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
 {
 	dst->value.floating = a->value.floating - b->value.floating;
 	return FT_OK;
 }
 
-enum ft_result
+static enum ft_result
 val_multiply(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
 {
 	dst->value.floating = a->value.floating * b->value.floating;
 	return FT_OK;
 }
 
-enum ft_result
+static enum ft_result
 val_divide(fvalue_t * dst, const fvalue_t *a, const fvalue_t *b, char **err_ptr _U_)
 {
 	dst->value.floating = a->value.floating / b->value.floating;
diff --git a/epan/tvbuff_rdp.c b/epan/tvbuff_rdp.c
index 8487df384b..0e3c7938ce 100644
--- a/epan/tvbuff_rdp.c
+++ b/epan/tvbuff_rdp.c
@@ -322,7 +322,7 @@ zgfx_write_from_history(zgfx_context_t *zgfx, guint32 distance, guint32 count)
 }
 
 
-gboolean
+static gboolean
 rdp8_decompress_segment(zgfx_context_t *zgfx, tvbuff_t *tvb)
 {
 	bitstream_t bitstream;