01-29-2008
Problem resolution – for anyone interested.
The problem was finally solved by -Bsymbolic, but it was in a roundabout way.
We are working on HP and when we ran into the problem we were compiling with gcc. We tried adding –Bsymbolic to the gcc command but it didn’t help. We then tried adding –W1,Bsymbolic in order to pass the option to the linker, but this didn’t help either.
Now we have moved to compile with HP’s native aCC, for reasons that are unrelated to this problem. With aCC when we gave it –W1,Bsymbolic the library’s symbols were finally taken locally.
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LEARN ABOUT NETBSD
__builtin_constant_p
__BUILTIN_CONSTANT_P(3) BSD Library Functions Manual __BUILTIN_CONSTANT_P(3)
NAME
__builtin_constant_p -- GNU extension to determine compile time constants
SYNOPSIS
int
__builtin_constant_p(value);
DESCRIPTION
The __builtin_constant_p() is a GNU extension for determining whether a value is known to be constant at compile time. The function is
closely related to the concept of ``constant folding'' used by modern optimizing compilers.
If the value is known to be a compile-time constant, a value 1 is returned. If __builtin_constant_p() returns 0, the value is not a compile-
time constant in the sense that gcc(1) was unable to determine whether the value is constant or not.
EXAMPLES
A typical example of the use of __builtin_constant_p() involves a situation where it may be desirable to fold the computation if it involves
a constant, but a function call is needed otherwise. For instance, bswap16(3) is defined in NetBSD as:
#define bswap16(x)
(__builtin_constant_p((x)) ?
__byte_swap_u16_constant(x) : __BYTE_SWAP_U16_VARIABLE(x))
SEE ALSO
gcc(1), __builtin_object_size(3), __builtin_return_address(3)
CAVEATS
This is a non-standard, compiler-specific extension.
BSD
December 19, 2010 BSD