fixes in the C runtime to avoid warnings when compiling on MacOS

4 files changed, 9 insertions, 10 deletions

diff --git a/src/runtime/c/gu/bits.h b/src/runtime/c/gu/bits.h
index 9ba1b0c8e..5a55ff233 100644
--- a/src/runtime/c/gu/bits.h
+++ b/src/runtime/c/gu/bits.h
@@ -111,36 +111,36 @@ extern GU_DECLARE_TYPE(GuIntDecodeExn, abstract);
 	(((u_) <= (posmax_))					\
 	 ? (t_) (u_)						\
 	 : (tmin_) + ((t_) ((umax_) - (u_))) < 0		\
-	 ? -1 - ((t_) ((umax_) - (u_)))				\
-	 : (gu_raise(err_, GuIntDecodeExn), -1))
+	 ? (t_) (-1 - ((t_) ((umax_) - (u_))))				\
+	 : (t_) (gu_raise(err_, GuIntDecodeExn), -1))
 
 
 static inline int8_t
 gu_decode_2c8(uint8_t u, GuExn* err)
 {
 	return GU_DECODE_2C_(u, int8_t, UINT8_C(0xff), 
-			     INT8_C(0x7f), INT8_MIN, err);
+			     UINT8_C(0x7f), INT8_MIN, err);
 }
 
 static inline int16_t
 gu_decode_2c16(uint16_t u, GuExn* err)
 {
 	return GU_DECODE_2C_(u, int16_t, UINT16_C(0xffff), 
-			     INT16_C(0x7fff), INT16_MIN, err);
+			     UINT16_C(0x7fff), INT16_MIN, err);
 }
 
 static inline int32_t
 gu_decode_2c32(uint32_t u, GuExn* err)
 {
 	return GU_DECODE_2C_(u, int32_t, UINT32_C(0xffffffff), 
-			     INT32_C(0x7fffffff), INT32_MIN, err);
+			     UINT32_C(0x7fffffff), INT32_MIN, err);
 }
 
 static inline int64_t
 gu_decode_2c64(uint64_t u, GuExn* err)
 {
 	return GU_DECODE_2C_(u, int64_t, UINT64_C(0xffffffffffffffff), 
-			     INT64_C(0x7fffffffffffffff), INT64_MIN, err);
+			     UINT64_C(0x7fffffffffffffff), INT64_MIN, err);
 }
 
 double
diff --git a/src/runtime/c/gu/exn.h b/src/runtime/c/gu/exn.h
index 3fefae738..faf413a96 100644
--- a/src/runtime/c/gu/exn.h
+++ b/src/runtime/c/gu/exn.h
@@ -64,8 +64,7 @@ struct GuExn {
 	.parent = parent_,	\
 	.catch = gu_kind(catch_),	\
 	.caught = NULL,	\
-	.data.pool = pool_,		\
-	.data.data = NULL \
+	.data = {.pool = pool_, .data = NULL} \
 }
 
 
diff --git a/src/runtime/c/gu/string.c b/src/runtime/c/gu/string.c
index 995812fbf..8c9afd6e7 100644
--- a/src/runtime/c/gu/string.c
+++ b/src/runtime/c/gu/string.c
@@ -179,7 +179,7 @@ gu_string_is_prefix(GuString s1, GuString s2)
 	if (len1 > len2)
 		return false;
 
-	for (size_t len = len1; len--; len > 0) {
+	for (size_t len = len1; len > 0; len--) {
 		if (*s1 != *s2)
 			return false;
 
diff --git a/src/runtime/c/pgf/lightning/i386/core-64.h b/src/runtime/c/pgf/lightning/i386/core-64.h
index 4a856d96c..2d5380f40 100644
--- a/src/runtime/c/pgf/lightning/i386/core-64.h
+++ b/src/runtime/c/pgf/lightning/i386/core-64.h
@@ -193,7 +193,7 @@ struct jit_local_state {
 #define jit_retval_l(rd)	((void)jit_movr_l ((rd), _EAX))
 #define jit_arg_i()		(_jitl.nextarg_geti < JIT_ARG_MAX \
 				 ? _jitl.nextarg_geti++ \
-				 : ((_jitl.framesize += sizeof(long)) - sizeof(long)))
+				 : (int) ((_jitl.framesize += sizeof(long)) - sizeof(long)))
 #define jit_arg_c()		jit_arg_i()
 #define jit_arg_uc()		jit_arg_i()
 #define jit_arg_s()		jit_arg_i()