From 939d18ba4e41f08334e2f28eb514b2a6612b0197 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel@rtems.org>
Date: Wed, 28 Jan 2026 10:36:30 -0600
Subject: [PATCH] cpukit/libcrypt: Address -Wsign-compare warnings

This warning occurs when comparing a signed variable to an unsigned one.
This is frequently an int or ssize_t variable compared to a uint32_t or
size_t. Sometimes the size_t is from a sizeof() use.
---
 cpukit/libcrypt/crypt-sha256.c | 4 ++++
 cpukit/libcrypt/crypt-sha512.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/cpukit/libcrypt/crypt-sha256.c b/cpukit/libcrypt/crypt-sha256.c
index 24373680f7..3a636db4de 100644
--- a/cpukit/libcrypt/crypt-sha256.c
+++ b/cpukit/libcrypt/crypt-sha256.c
@@ -165,7 +165,11 @@ crypt_sha256_r(const char *key, const char *salt, struct crypt_data *data)
 	SHA256_Init(&alt_ctx);
 
 	/* For every character in the password add the entire password. */
+#ifdef __rtems__
+	for (cnt = 0; cnt < (size_t) (16 + alt_result[0]); ++cnt)
+#else
 	for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
+#endif
 		SHA256_Update(&alt_ctx, salt, salt_len);
 
 	/* Finish the digest. */
diff --git a/cpukit/libcrypt/crypt-sha512.c b/cpukit/libcrypt/crypt-sha512.c
index da8acd7790..877aed1a7e 100644
--- a/cpukit/libcrypt/crypt-sha512.c
+++ b/cpukit/libcrypt/crypt-sha512.c
@@ -165,7 +165,11 @@ crypt_sha512_r(const char *key, const char *salt, struct crypt_data *data)
 	SHA512_Init(&alt_ctx);
 
 	/* For every character in the password add the entire password. */
+#ifdef __rtems__
+	for (cnt = 0; cnt < (size_t) (16 + alt_result[0]); ++cnt)
+#else
 	for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt)
+#endif
 		SHA512_Update(&alt_ctx, salt, salt_len);
 
 	/* Finish the digest. */