diff -urEb openssl-3.1.0.orig/crypto/riscvcap.c openssl-3.1.0/crypto/riscvcap.c
--- openssl-3.1.0.orig/crypto/riscvcap.c	2023-03-14 13:59:07.000000000 +0100
+++ openssl-3.1.0/crypto/riscvcap.c	2023-04-04 17:18:21.018468423 +0200
@@ -37,7 +37,8 @@
 
 static void strtoupper(char *str)
 {
-    for (char *x = str; *x; ++x)
+    char* x;
+    for (x = str; *x; ++x)
         *x = toupper(*x);
 }
 
@@ -51,12 +52,13 @@
 {
     char envstrupper[BUFLEN];
     char buf[BUFLEN];
+    size_t i;
 
     /* Convert env str to all uppercase */
     OPENSSL_strlcpy(envstrupper, envstr, sizeof(envstrupper));
     strtoupper(envstrupper);
 
-    for (size_t i = 0; i < kRISCVNumCaps; ++i) {
+    for (i = 0; i < kRISCVNumCaps; ++i) {
         /* Prefix capability with underscore in preparation for search */
         BIO_snprintf(buf, BUFLEN, "_%s", RISCV_capabilities[i].name);
         if (strstr(envstrupper, buf) != NULL) {
diff -urEb openssl-3.1.0.orig/providers/implementations/rands/seeding/rand_unix.c openssl-3.1.0/providers/implementations/rands/seeding/rand_unix.c
--- openssl-3.1.0.orig/providers/implementations/rands/seeding/rand_unix.c	2023-03-14 13:59:07.000000000 +0100
+++ openssl-3.1.0/providers/implementations/rands/seeding/rand_unix.c	2023-04-04 17:17:43.874649403 +0200
@@ -452,6 +452,7 @@
              * system call and this should always succeed which renders
              * this alternative but essentially identical source moot.
              */
+#if !defined(__LSB_VERSION__)  // "syscall()" is not available in LSB
             if (uname(&un) == 0) {
                 kernel[0] = atoi(un.release);
                 p = strchr(un.release, '.');
@@ -462,6 +463,7 @@
                     return 0;
                 }
             }
+#endif
             /* Open /dev/random and wait for it to be readable */
             if ((fd = open(DEVRANDOM_WAIT, O_RDONLY)) != -1) {
                 if (DEVRANDM_WAIT_USE_SELECT && fd < FD_SETSIZE) {