https://src.fedoraproject.org/rpms/libmcrypt/blob/e02fbd614a5b7ba093e9e15ab322e7eb02d64e3b/f/libmcrypt-c99.patch

Add return and argument types to fake prototypes in mcrypt_symb.c.
This avoids build failures with future compilers that do not support
implicit function declarations.

Also fix a minor type error in the perminit calls in the Triple DES
implementation.

Submitted upstream: <https://sourceforge.net/p/mcrypt/patches/15/>

diff --git a/lib/Makefile.am b/lib/Makefile.am
index a1a09578858aaf3c..a92f150627a1f610 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -23,8 +23,8 @@ mcrypt_symb.c: mcrypt_internal.h
 	@echo "/* This is automatically created. Don't touch... */" >> mcrypt_symb.c
 	@echo "" >> mcrypt_symb.c
 	-@for i in $(EXTRA_ALGOS); do \
-		if test -f ../modules/algorithms/$$i.c; then cat ../modules/algorithms/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern "$$3"();";}' >> mcrypt_symb.c 2>/dev/null; fi; \
-		if test -f ../modules/modes/$$i.c; then cat ../modules/modes/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern "$$3"();";}' >> mcrypt_symb.c 2>/dev/null; fi; \
+		if test -f ../modules/algorithms/$$i.c; then cat ../modules/algorithms/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern void "$$3"(void);";}' >> mcrypt_symb.c 2>/dev/null; fi; \
+		if test -f ../modules/modes/$$i.c; then cat ../modules/modes/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern void "$$3"(void);";}' >> mcrypt_symb.c 2>/dev/null; fi; \
 	done
 	@echo "" >> mcrypt_symb.c
 	@echo "const mcrypt_preloaded mps[] = {" >> mcrypt_symb.c
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 1baaa1e94be1abce..e0e690d1c831370f 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -561,8 +561,8 @@ mcrypt_symb.c: mcrypt_internal.h
 	@echo "/* This is automatically created. Don't touch... */" >> mcrypt_symb.c
 	@echo "" >> mcrypt_symb.c
 	-@for i in $(EXTRA_ALGOS); do \
-		if test -f ../modules/algorithms/$$i.c; then cat ../modules/algorithms/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern "$$3"();";}' >> mcrypt_symb.c 2>/dev/null; fi; \
-		if test -f ../modules/modes/$$i.c; then cat ../modules/modes/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern "$$3"();";}' >> mcrypt_symb.c 2>/dev/null; fi; \
+		if test -f ../modules/algorithms/$$i.c; then cat ../modules/algorithms/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern void "$$3"(void);";}' >> mcrypt_symb.c 2>/dev/null; fi; \
+		if test -f ../modules/modes/$$i.c; then cat ../modules/modes/$$i.c 2>/dev/null|grep define|grep LTX|awk '{print "extern void "$$3"(void);";}' >> mcrypt_symb.c 2>/dev/null; fi; \
 	done
 	@echo "" >> mcrypt_symb.c
 	@echo "const mcrypt_preloaded mps[] = {" >> mcrypt_symb.c
diff --git a/modules/algorithms/tripledes.c b/modules/algorithms/tripledes.c
index 98e9bd45b4f336b1..2737d2fd8fd02a3f 100644
--- a/modules/algorithms/tripledes.c
+++ b/modules/algorithms/tripledes.c
@@ -201,8 +201,8 @@ static int _mcrypt_desinit(TRIPLEDES_KEY * key)
 	spinit(key, 0);
 	spinit(key, 1);
 	spinit(key, 2);
-	perminit(&key->iperm, ip);
-	perminit(&key->fperm, fp);
+	perminit(key->iperm, ip);
+	perminit(key->fperm, fp);
 
 
 	return 0;