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我遇到这样的错误:
- ../sysdeps/ieee754/dbl-64/s_isinf.c:29: error: 'isinf' aliased to undefined symbol '__isinf'
- make[2]: *** [/mnt/lfs/sources/glibc-build/math/s_isinf.os] Error 1
- make[2]: Leaving directory `/mnt/lfs/sources/glibc-2.3.5/math'
- make[1]: *** [math/subdir_lib] Error 2
- make[1]: Leaving directory `/mnt/lfs/sources/glibc-2.3.5'
- make: *** [all] Error 2
- -bash-3.00$
复制代码
文件内容:
- /*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>.
- * Public domain.
- */
- #if defined(LIBM_SCCS) && !defined(lint)
- static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
- #endif
- /*
- * isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
- * no branching!
- */
- #include "math.h"
- #include "math_private.h"
- int
- __isinf (double x)
- {
- int32_t hx,lx;
- EXTRACT_WORDS(hx,lx,x);
- lx |= (hx & 0x7fffffff) ^ 0x7ff00000;
- lx |= -lx;
- return ~(lx >> 31) & (hx >> 30);
- }
- hidden_def (__isinf)
- weak_alias (__isinf, isinf)
- #ifdef NO_LONG_DOUBLE
- strong_alias (__isinf, __isinfl)
- weak_alias (__isinf, isinfl)
- #endif
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