From d89fa59beda49c0365afc19c2990a2bf935ef369 Mon Sep 17 00:00:00 2001
From: "Reece H. Dunn" <msclrhd@gmail.com>
Date: Thu, 5 Oct 2017 07:23:17 +0100
Subject: [PATCH] Enable and fix -Wunused-variable warnings.

---
 configure.ac                   | 4 ++--
 src/libespeak-ng/compiledata.c | 2 --
 src/libespeak-ng/readclause.c  | 1 -
 src/libespeak-ng/synthdata.c   | 2 --
 src/libespeak-ng/translate.c   | 1 -
 tests/readclause.c             | 1 -
 6 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/configure.ac b/configure.ac
index 273889d8..0619cb3a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -275,9 +275,9 @@ dnl
 dnl Reference: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
 dnl ================================================================
 
-AX_CHECK_COMPILE_FLAG([-Wunused-function], [CFLAGS="-Wunused-function $CFLAGS"])
-
+AX_CHECK_COMPILE_FLAG([-Wunused-function],  [CFLAGS="-Wunused-function $CFLAGS"])
 AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [CFLAGS="-Wunused-parameter $CFLAGS"])
+AX_CHECK_COMPILE_FLAG([-Wunused-variable],  [CFLAGS="-Wunused-variable $CFLAGS"])
 
 dnl ================================================================
 dnl Generate output.
diff --git a/src/libespeak-ng/compiledata.c b/src/libespeak-ng/compiledata.c
index 213692b7..572961df 100644
--- a/src/libespeak-ng/compiledata.c
+++ b/src/libespeak-ng/compiledata.c
@@ -2359,8 +2359,6 @@ static void WritePhonemeTables()
 static void EndPhonemeTable()
 {
 	int ix;
-	int *pw;
-	int length;
 
 	if (n_phoneme_tabs == 0)
 		return;
diff --git a/src/libespeak-ng/readclause.c b/src/libespeak-ng/readclause.c
index ef8da7d1..39a3f026 100644
--- a/src/libespeak-ng/readclause.c
+++ b/src/libespeak-ng/readclause.c
@@ -184,7 +184,6 @@ int Eof(void)
 static int GetC(void)
 {
 	int c1;
-	static int ungot2 = 0;
 
 	if ((c1 = ungot_char) != 0) {
 		ungot_char = 0;
diff --git a/src/libespeak-ng/synthdata.c b/src/libespeak-ng/synthdata.c
index 9bf47423..2d4f27a1 100644
--- a/src/libespeak-ng/synthdata.c
+++ b/src/libespeak-ng/synthdata.c
@@ -112,7 +112,6 @@ espeak_ng_STATUS LoadPhData(int *srate, espeak_ng_ERROR_CONTEXT *context)
 	int length = 0;
 	int rate;
 	unsigned char *p;
-	int *pw;
 
 	espeak_ng_STATUS status;
 	if ((status = ReadPhFile((void **)&phoneme_tab_data, "phontab", NULL, context)) != ENS_OK)
@@ -508,7 +507,6 @@ static bool InterpretCondition(Translator *tr, int control, PHONEME_LIST *plist,
 	unsigned int data;
 	int instn;
 	int instn2;
-	int count;
 	int check_endtype = 0;
 	PHONEME_TAB *ph;
 	PHONEME_LIST *plist_this;
diff --git a/src/libespeak-ng/translate.c b/src/libespeak-ng/translate.c
index 73cd9948..7ddb49af 100644
--- a/src/libespeak-ng/translate.c
+++ b/src/libespeak-ng/translate.c
@@ -525,7 +525,6 @@ static int TranslateWord3(Translator *tr, char *word_start, WORD_TAB *wtab, char
 	int more_suffixes;
 	int confirm_prefix;
 	int spell_word;
-	int stress_bits;
 	int emphasize_allcaps = 0;
 	int wflags;
 	int wmark;
diff --git a/tests/readclause.c b/tests/readclause.c
index 486c0979..2692ba10 100644
--- a/tests/readclause.c
+++ b/tests/readclause.c
@@ -41,7 +41,6 @@ static short charix[N_TR_SOURCE+4];
 static int charix_top = 0;
 static int tone2;
 static char voice_change_name[40];
-static int terminator;
 
 static espeak_ng_STATUS
 set_text(const char *text, const char *voicename)