From 05d9a4839c1ac792b9a3842e6bd0ad13c5316359 Mon Sep 17 00:00:00 2001
From: "Reece H. Dunn" <msclrhd@gmail.com>
Date: Thu, 5 Oct 2017 20:14:06 +0100
Subject: [PATCH] Enable and fix -Wmissing-prototypes warnings.

---
 configure.ac         |  1 +
 tests/printcdata.c   | 12 ++++++------
 tests/printucddata.c | 12 ++++++------
 3 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index 46fc4cba..399f99e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,7 @@ dnl
 dnl Reference: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
 dnl ================================================================
 
+AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes],    [CFLAGS="-Wmissing-prototypes $CFLAGS"])
 AX_CHECK_COMPILE_FLAG([-Wreturn-type],           [CFLAGS="-Wreturn-type $CFLAGS"])
 
 dnl ================================================================
diff --git a/tests/printcdata.c b/tests/printcdata.c
index 6992bb94..9d0ab18a 100644
--- a/tests/printcdata.c
+++ b/tests/printcdata.c
@@ -33,7 +33,7 @@ static int iswblank(wint_t c)
 }
 #endif
 
-void fput_utf8c(FILE *out, codepoint_t c)
+static void fput_utf8c(FILE *out, codepoint_t c)
 {
 	if (c < 0x80)
 		fputc((uint8_t)c, out);
@@ -57,7 +57,7 @@ void fput_utf8c(FILE *out, codepoint_t c)
 	}
 }
 
-int fget_utf8c(FILE *in, codepoint_t *c)
+static int fget_utf8c(FILE *in, codepoint_t *c)
 {
 	int ch = EOF;
 	if ((ch = fgetc(in)) == EOF) return 0;
@@ -90,7 +90,7 @@ int fget_utf8c(FILE *in, codepoint_t *c)
 	return 1;
 }
 
-void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
+static void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
 {
 	switch (mode)
 	{
@@ -112,7 +112,7 @@ void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
 	}
 }
 
-void uprintf_is(FILE *out, codepoint_t c, char mode)
+static void uprintf_is(FILE *out, codepoint_t c, char mode)
 {
 	switch (mode)
 	{
@@ -155,7 +155,7 @@ void uprintf_is(FILE *out, codepoint_t c, char mode)
 	}
 }
 
-void uprintf(FILE *out, codepoint_t c, const char *format)
+static void uprintf(FILE *out, codepoint_t c, const char *format)
 {
 	while (*format) switch (*format)
 	{
@@ -221,7 +221,7 @@ void uprintf(FILE *out, codepoint_t c, const char *format)
 	}
 }
 
-void print_file(FILE *in, const char *format)
+static void print_file(FILE *in, const char *format)
 {
 	codepoint_t c = 0;
 	while (fget_utf8c(in, &c))
diff --git a/tests/printucddata.c b/tests/printucddata.c
index b592f820..9a623bf3 100644
--- a/tests/printucddata.c
+++ b/tests/printucddata.c
@@ -22,7 +22,7 @@
 #include <string.h>
 #include <stdio.h>
 
-void fput_utf8c(FILE *out, codepoint_t c)
+static void fput_utf8c(FILE *out, codepoint_t c)
 {
 	if (c < 0x80)
 		fputc((uint8_t)c, out);
@@ -46,7 +46,7 @@ void fput_utf8c(FILE *out, codepoint_t c)
 	}
 }
 
-int fget_utf8c(FILE *in, codepoint_t *c)
+static int fget_utf8c(FILE *in, codepoint_t *c)
 {
 	int ch = EOF;
 	if ((ch = fgetc(in)) == EOF) return 0;
@@ -79,7 +79,7 @@ int fget_utf8c(FILE *in, codepoint_t *c)
 	return 1;
 }
 
-void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
+static void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
 {
 	switch (mode)
 	{
@@ -101,7 +101,7 @@ void uprintf_codepoint(FILE *out, codepoint_t c, char mode)
 	}
 }
 
-void uprintf_is(FILE *out, codepoint_t c, char mode)
+static void uprintf_is(FILE *out, codepoint_t c, char mode)
 {
 	switch (mode)
 	{
@@ -144,7 +144,7 @@ void uprintf_is(FILE *out, codepoint_t c, char mode)
 	}
 }
 
-void uprintf(FILE *out, codepoint_t c, const char *format)
+static void uprintf(FILE *out, codepoint_t c, const char *format)
 {
 	while (*format) switch (*format)
 	{
@@ -210,7 +210,7 @@ void uprintf(FILE *out, codepoint_t c, const char *format)
 	}
 }
 
-void print_file(FILE *in, const char *format)
+static void print_file(FILE *in, const char *format)
 {
 	codepoint_t c = 0;
 	while (fget_utf8c(in, &c))