libc: rename TRUNCATE64_HAS_4_ARGS to SYSCALL_ALIGN_64BIT

The reason truncate64 takes 4 args on some arches is that their ABI
requires 64bit values to be aligned on register pair boundaries.
Since this alignment affects more than just truncate64, rename the
define to properly document its purpose.  This also allows us to
expand it to the other impacted syscalls (which will be done in a
follow up commit).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

31 files changed, 60 insertions, 60 deletions

diff --git a/libc/sysdeps/linux/alpha/bits/uClibc_arch_features.h b/libc/sysdeps/linux/alpha/bits/uClibc_arch_features.h
index e106d12fa..e69814efa 100644
--- a/libc/sysdeps/linux/alpha/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/alpha/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #define __UCLIBC_SLIGHTLY_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/arm/bits/uClibc_arch_features.h b/libc/sysdeps/linux/arm/bits/uClibc_arch_features.h
index 8c43e5345..b01d79c5c 100644
--- a/libc/sysdeps/linux/arm/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/arm/bits/uClibc_arch_features.h
@@ -11,11 +11,11 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
 #ifdef __ARM_EABI__
-#define __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
 #else
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 #endif
 
 /* does your target have a broken create_module() ? */
diff --git a/libc/sysdeps/linux/avr32/bits/uClibc_arch_features.h b/libc/sysdeps/linux/avr32/bits/uClibc_arch_features.h
index c30657771..3da62c2e5 100644
--- a/libc/sysdeps/linux/avr32/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/avr32/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/bfin/bits/uClibc_arch_features.h b/libc/sysdeps/linux/bfin/bits/uClibc_arch_features.h
index ce63c80b2..fa0f4e94f 100644
--- a/libc/sysdeps/linux/bfin/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/bfin/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/c6x/bits/uClibc_arch_features.h b/libc/sysdeps/linux/c6x/bits/uClibc_arch_features.h
index 59e7de987..4c4498586 100644
--- a/libc/sysdeps/linux/c6x/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/c6x/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/common/bits/uClibc_arch_features.h b/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
index 6cb617759..f3e3fd1d3 100644
--- a/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
@@ -14,8 +14,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/common/ftruncate64.c b/libc/sysdeps/linux/common/ftruncate64.c
index 012a1f4ed..c0a373ca1 100644
--- a/libc/sysdeps/linux/common/ftruncate64.c
+++ b/libc/sysdeps/linux/common/ftruncate64.c
@@ -31,7 +31,7 @@ int ftruncate64 (int fd, __off64_t length)
 {
     uint32_t low = length & 0xffffffff;
     uint32_t high = length >> 32;
-#  if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+#  if defined(__UCLIBC_SYSCALL_ALIGN_64BIT__)
     return INLINE_SYSCALL(ftruncate64,
 	    4, fd, 0, __LONG_LONG_PAIR (high, low));
 #  else
diff --git a/libc/sysdeps/linux/common/truncate.c b/libc/sysdeps/linux/common/truncate.c
index 0c533df94..5cbf67351 100644
--- a/libc/sysdeps/linux/common/truncate.c
+++ b/libc/sysdeps/linux/common/truncate.c
@@ -19,7 +19,7 @@ int truncate(const char *path, __off_t length)
 # if defined __UCLIBC_HAS_LFS
 	return truncate64(path, length);
 # elif __WORDSIZE == 32
-#  if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+#  if defined(__UCLIBC_SYSCALL_ALIGN_64BIT__)
 	return INLINE_SYSCALL(truncate64, 4, path, 0, OFF_HI_LO(length));
 #  else
 	return INLINE_SYSCALL(truncate64, 3, path, OFF_HI_LO(length));
diff --git a/libc/sysdeps/linux/common/truncate64.c b/libc/sysdeps/linux/common/truncate64.c
index 1f5f862e5..e2868be15 100644
--- a/libc/sysdeps/linux/common/truncate64.c
+++ b/libc/sysdeps/linux/common/truncate64.c
@@ -26,7 +26,7 @@ int truncate64(const char * path, __off64_t length)
 {
 	uint32_t low = length & 0xffffffff;
 	uint32_t high = length >> 32;
-#  if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+#  if defined(__UCLIBC_SYSCALL_ALIGN_64BIT__)
 	return INLINE_SYSCALL(truncate64, 4, path, 0,
 			__LONG_LONG_PAIR(high, low));
 #  else
diff --git a/libc/sysdeps/linux/cris/bits/uClibc_arch_features.h b/libc/sysdeps/linux/cris/bits/uClibc_arch_features.h
index fc1494610..0b47ee9b0 100644
--- a/libc/sysdeps/linux/cris/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/cris/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #define __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/e1/bits/uClibc_arch_features.h b/libc/sysdeps/linux/e1/bits/uClibc_arch_features.h
index 2a9422e23..32247b85a 100644
--- a/libc/sysdeps/linux/e1/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/e1/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/frv/bits/uClibc_arch_features.h b/libc/sysdeps/linux/frv/bits/uClibc_arch_features.h
index 2a9422e23..32247b85a 100644
--- a/libc/sysdeps/linux/frv/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/frv/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/h8300/bits/uClibc_arch_features.h b/libc/sysdeps/linux/h8300/bits/uClibc_arch_features.h
index 4bab5476d..b76b861b9 100644
--- a/libc/sysdeps/linux/h8300/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/h8300/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/hppa/bits/uClibc_arch_features.h b/libc/sysdeps/linux/hppa/bits/uClibc_arch_features.h
index 18cd732a4..9ec948d8d 100644
--- a/libc/sysdeps/linux/hppa/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/hppa/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h b/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
index 536e9c155..e2be1df6e 100644
--- a/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/i386/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #define __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/i960/bits/uClibc_arch_features.h b/libc/sysdeps/linux/i960/bits/uClibc_arch_features.h
index 0ddef34b0..deaf6c756 100644
--- a/libc/sysdeps/linux/i960/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/i960/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #define __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/ia64/bits/uClibc_arch_features.h b/libc/sysdeps/linux/ia64/bits/uClibc_arch_features.h
index a3644ceb1..03a6fc6a5 100644
--- a/libc/sysdeps/linux/ia64/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/ia64/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/m68k/bits/uClibc_arch_features.h b/libc/sysdeps/linux/m68k/bits/uClibc_arch_features.h
index 518fb3959..05fca8d4c 100644
--- a/libc/sysdeps/linux/m68k/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/m68k/bits/uClibc_arch_features.h
@@ -15,8 +15,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #define __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h b/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h
index 0a0d00d16..8523602a7 100644
--- a/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/metag/bits/uClibc_arch_features.h
@@ -16,8 +16,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/microblaze/bits/uClibc_arch_features.h b/libc/sysdeps/linux/microblaze/bits/uClibc_arch_features.h
index 86d00084c..164659c1f 100644
--- a/libc/sysdeps/linux/microblaze/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/microblaze/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/mips/bits/uClibc_arch_features.h b/libc/sysdeps/linux/mips/bits/uClibc_arch_features.h
index 82f67bf84..6e564b18c 100644
--- a/libc/sysdeps/linux/mips/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/mips/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#define __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/nios/bits/uClibc_arch_features.h b/libc/sysdeps/linux/nios/bits/uClibc_arch_features.h
index 2a9422e23..32247b85a 100644
--- a/libc/sysdeps/linux/nios/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/nios/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/nios2/bits/uClibc_arch_features.h b/libc/sysdeps/linux/nios2/bits/uClibc_arch_features.h
index 2a9422e23..32247b85a 100644
--- a/libc/sysdeps/linux/nios2/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/nios2/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/powerpc/bits/uClibc_arch_features.h b/libc/sysdeps/linux/powerpc/bits/uClibc_arch_features.h
index 6f1f396fe..ed1195a5a 100644
--- a/libc/sysdeps/linux/powerpc/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/powerpc/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#define __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/sh/bits/uClibc_arch_features.h b/libc/sysdeps/linux/sh/bits/uClibc_arch_features.h
index 5e3528d27..dde7dc474 100644
--- a/libc/sysdeps/linux/sh/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/sh/bits/uClibc_arch_features.h
@@ -15,8 +15,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/sh64/bits/uClibc_arch_features.h b/libc/sysdeps/linux/sh64/bits/uClibc_arch_features.h
index 46bf23e83..001c5c233 100644
--- a/libc/sysdeps/linux/sh64/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/sh64/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/sparc/bits/uClibc_arch_features.h b/libc/sysdeps/linux/sparc/bits/uClibc_arch_features.h
index 2d8cdd78b..746390b39 100644
--- a/libc/sysdeps/linux/sparc/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/sparc/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/v850/bits/uClibc_arch_features.h b/libc/sysdeps/linux/v850/bits/uClibc_arch_features.h
index 4bab5476d..b76b861b9 100644
--- a/libc/sysdeps/linux/v850/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/v850/bits/uClibc_arch_features.h
@@ -12,8 +12,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/vax/bits/uClibc_arch_features.h b/libc/sysdeps/linux/vax/bits/uClibc_arch_features.h
index f9a7b39cf..13cbff0e5 100644
--- a/libc/sysdeps/linux/vax/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/vax/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/x86_64/bits/uClibc_arch_features.h b/libc/sysdeps/linux/x86_64/bits/uClibc_arch_features.h
index 1d966aee4..190d81477 100644
--- a/libc/sysdeps/linux/x86_64/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/x86_64/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#undef __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__
diff --git a/libc/sysdeps/linux/xtensa/bits/uClibc_arch_features.h b/libc/sysdeps/linux/xtensa/bits/uClibc_arch_features.h
index fef17658d..444eb0f79 100644
--- a/libc/sysdeps/linux/xtensa/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/xtensa/bits/uClibc_arch_features.h
@@ -11,8 +11,8 @@
 /* can your target use syscall6() for mmap ? */
 #define __UCLIBC_MMAP_HAS_6_ARGS__
 
-/* does your target use syscall4() for truncate64 ? (32bit arches only) */
-#define __UCLIBC_TRUNCATE64_HAS_4_ARGS__
+/* does your target align 64bit values in register pairs ? (32bit arches only) */
+#define __UCLIBC_SYSCALL_ALIGN_64BIT__
 
 /* does your target have a broken create_module() ? */
 #undef __UCLIBC_BROKEN_CREATE_MODULE__