Manually define __ARM_FEATURE_AES (necessary for CheriOS)

src/libsodium/crypto_aead/aegis128l/armcrypto/aead_aegis128l_armcrypto.c

@@ -17,6 +17,10 @@
 
 #if defined(HAVE_ARMCRYPTO) && defined(NATIVE_LITTLE_ENDIAN)
 
+#ifndef __ARM_FEATURE_AES
+#define __ARM_FEATURE_AES 1
+#endif
+
 #include <arm_neon.h>
 
 typedef uint8x16_t aes_block_t;

src/libsodium/crypto_aead/aegis256/armcrypto/aead_aegis256_armcrypto.c

@@ -17,7 +17,11 @@
 
 #if defined(HAVE_ARMCRYPTO) && defined(NATIVE_LITTLE_ENDIAN)
 
-# include <arm_neon.h>
+#ifndef __ARM_FEATURE_AES
+#define __ARM_FEATURE_AES 1
+#endif
+
+#include <arm_neon.h>
 
 typedef uint8x16_t aes_block_t;
 #define AES_BLOCK_XOR(A, B)       veorq_u8((A), (B))

src/libsodium/crypto_aead/aes256gcm/armcrypto/aead_aes256gcm_armcrypto.c

@@ -19,6 +19,10 @@
 #define __vectorcall
 #endif
 
+#ifndef __ARM_FEATURE_AES
+#define __ARM_FEATURE_AES 1
+#endif
+
 #include <arm_neon.h>
 
 #define ABYTES    crypto_aead_aes256gcm_ABYTES