blake2s.c:258:26: error: incompatible types when initializing type ‘uint32_t {aka unsigned int}’ using type ‘BlakeVectorUInt32 {aka __vector(4) unsigned int}’

[NickeZ]

I'm getting the following compiler error when compiling with gcc 7 or 8.

$ make -C src/protocol
make: Entering directory '/tmp/noise-tmp/src/protocol'
depbase=`echo ../crypto/blake2/blake2s.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
gcc-7 -DPACKAGE_NAME=\"noise-c\" -DPACKAGE_TARNAME=\"noise-c\" -DPACKAGE_VERSION=\"0.0.1\" -DPACKAGE_STRING=\"noise-c\ 0.0.1\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"noise-c\" -DVERSION=\"0.0.1\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DSIZEOF_VOID_P=8 -DHAVE_LIBRT=1 -DHAVE_POLL=1 -DHAVE_PTHREAD_PRIO_INHERIT=1 -I. -I/home/niklas/projects/external/noise-c/src/protocol  -I/home/niklas/projects/external/noise-c/include -I/home/niklas/projects/external/noise-c/src -I/home/niklas/projects/external/noise-c/src/crypto/goldilocks/src/include -I/home/niklas/projects/external/noise-c/src/crypto/goldilocks/src/p448 -I/home/niklas/projects/external/noise-c/src/crypto/goldilocks/src/p448/arch_x86_64   -DED25519_CUSTOMHASH -DED25519_CUSTOMRANDOM  -Wall   -g -O2 -pthread -MT ../crypto/blake2/blake2s.o -MD -MP -MF $depbase.Tpo -c -o ../crypto/blake2/blake2s.o /home/niklas/projects/external/noise-c/src/protocol/../crypto/blake2/blake2s.c &&\
mv -f $depbase.Tpo $depbase.Po
/home/niklas/projects/external/noise-c/src/protocol/../crypto/blake2/blake2s.c: In function ‘BLAKE2s_finish’:
/home/niklas/projects/external/noise-c/src/protocol/../crypto/blake2/blake2s.c:258:26: error: incompatible types when initializing type ‘uint32_t {aka unsigned int}’ using type ‘BlakeVectorUInt32 {aka __vector(4) unsigned int}’
             uint32_t h = context->h[posn];
                          ^~~~~~~
make: *** [Makefile:794: ../crypto/blake2/blake2s.o] Error 1
make: Leaving directory '/tmp/noise-tmp/src/protocol'

Configured with:

/home/niklas/projects/external/noise-c/configure --with-libsodium=no --with-openssl=no

[NickeZ]

I was trying to add support for the arm gcc toolchain and hit the above bug because of endianess problems. Here is the final diff I applied which works:

From 275be759990bdfaf634df9e7c685430e278a5a9c Mon Sep 17 00:00:00 2001
From: Niklas Claesson <[email protected]>
Date: Wed, 19 Jun 2019 16:12:39 +0200
Subject: [PATCH] use byteorder from compiler

---
 src/crypto/blake2/blake2-endian.h        | 8 +++++++-
 src/crypto/ghash/ghash.c                 | 9 ++++++++-
 src/crypto/goldilocks/src/include/word.h | 7 ++++++-
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/src/crypto/blake2/blake2-endian.h b/src/crypto/blake2/blake2-endian.h
index 10e40ab..25a3239 100644
--- a/src/crypto/blake2/blake2-endian.h
+++ b/src/crypto/blake2/blake2-endian.h
@@ -23,6 +23,12 @@
 #ifndef __BLAKE2_ENDIAN_H__
 #define __BLAKE2_ENDIAN_H__
 
+#if defined(__BYTE_ORDER__)
+#define __BYTE_ORDER __BYTE_ORDER__
+#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
+#endif
+
 #if defined(__WIN32__) || defined(WIN32)
 #ifndef __BIG_ENDIAN
 #define __BIG_ENDIAN 4321
@@ -44,7 +50,7 @@
 #if !defined( __LITTLE_ENDIAN) && defined(__DARWIN_LITTLE_ENDIAN)
 #define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN
 #endif
-#else
+#elif !defined(__BYTE_ORDER)
 #include <endian.h>
 #endif
 
diff --git a/src/crypto/ghash/ghash.c b/src/crypto/ghash/ghash.c
index e2bc5b2..d2c4a69 100644
--- a/src/crypto/ghash/ghash.c
+++ b/src/crypto/ghash/ghash.c
@@ -22,6 +22,13 @@
 
 #include "ghash.h"
 #include <string.h>
+
+#if defined(__BYTE_ORDER__)
+#define __BYTE_ORDER __BYTE_ORDER__
+#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
+#endif
+
 #if defined(__WIN32__) || defined(WIN32)
 #ifndef __BIG_ENDIAN
 #define __BIG_ENDIAN 4321
@@ -43,7 +50,7 @@
 #if !defined( __LITTLE_ENDIAN) && defined(__DARWIN_LITTLE_ENDIAN)
 #define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN
 #endif
-#else
+#elif !defined(__BYTE_ORDER)
 #include <endian.h>
 #endif
 
diff --git a/src/crypto/goldilocks/src/include/word.h b/src/crypto/goldilocks/src/include/word.h
index 9ad01e1..1a3c950 100644
--- a/src/crypto/goldilocks/src/include/word.h
+++ b/src/crypto/goldilocks/src/include/word.h
@@ -10,8 +10,13 @@
 
 #include "arch_config.h"
 
+#if defined(__BYTE_ORDER__)
+#define __BYTE_ORDER __BYTE_ORDER__
+#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
+#endif
 
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__BYTE_ORDER)
 #if defined(__WIN32__) || defined(WIN32)
 #ifndef __BIG_ENDIAN
 #define __BIG_ENDIAN 4321
-- 
2.20.1

[NickeZ]

In this toolchain endian.h is available in machine/ but I think it is more robust to use the gcc builtin variables.