define LONG_MAX via arch alltypes.h, strip down bits/limits.h

LLONG_MAX is uniform for all archs we support and plenty of header and
code level logic assumes it is, so it does not make sense for limits.h
bits mechanism to pretend it's variable.

LONG_BIT can be defined in terms of LONG_MAX; there's no reason to put
it in bits.

by moving LONG_MAX definition to __LONG_MAX in alltypes.h and moving
LLONG_MAX out of bits, there are now no plain-C limits that are
defined in the bits header, so the bits header only needs to be
included in the POSIX or extended profiles. this allows the feature
test macro logic to be removed from the bits header, facilitating a
long-term goal of getting such logic out of bits.

having __LONG_MAX in alltypes.h will allow further generalization of
headers.

archs without a constant PAGESIZE no longer need bits/limits.h at all.

2 files changed, 2 insertions, 7 deletions

diff --git a/arch/aarch64/bits/alltypes.h.in b/arch/aarch64/bits/alltypes.h.in
index ab2c6a26..60973f6a 100644
--- a/arch/aarch64/bits/alltypes.h.in
+++ b/arch/aarch64/bits/alltypes.h.in
@@ -8,6 +8,8 @@
 #define __BYTE_ORDER 1234
 #endif
 
+#define __LONG_MAX 0x7fffffffffffffffL
+
 #ifndef __cplusplus
 TYPEDEF unsigned wchar_t;
 #endif
diff --git a/arch/aarch64/bits/limits.h b/arch/aarch64/bits/limits.h
deleted file mode 100644
index 0226588c..00000000
--- a/arch/aarch64/bits/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
-#define LONG_BIT 64
-#endif
-
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL