Given various methods for determining byte order on different platforms, the
following can be used in C++ to find the byte order across platforms.
static const uint32_t bytes = 0x03020100ul;
static const unsigned lo = *(const unsigned char*)&bytes;
Unfortunately, the value of 'lo' is determined at pre-run rather than at
compile time.
It would be useful if the compiler could determine the value of 'lo' so as to
eliminate constant logical tests and jumps.
--
Summary: static initialisation through pointer deferred until run
time
Product: gcc
Version: 4.2.4
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ajrobb at bigfoot dot com
GCC build triplet: i486-linux-gnu
GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37949
