数学库函数问题

[laiyh]

brew应用程序进行交叉编译时，C库中的数学函数，在助手函数中没有对应函数，如sin,cos等，这些都要自己去实现吗？请教有经验的高手和楼主指点，折腾好几天了，编译时总是如下提示：
ror: L6265E: Non-RWPI Section libspace.o(.bss) cannot be assigned to PI Exec region ER_ZI.
Error: L6265E: Non-RWPI Section stdio.o(.bss) cannot be assigned to PI Exec region ER_ZI.
Error: L6248E: libspace.o(.text) in PI region 'ER_RO' cannot have address type relocation to __libspace_start in PI region 'ER_ZI'.
Error: L6248E: _main_redirect.o(.text) in PI region 'ER_RO' cannot have address type relocation to __stderr in PI region 'ER_ZI'.
Error: L6248E: _main_redirect.o(.text) in PI region 'ER_RO' cannot have address type relocation to __stdin in PI region 'ER_ZI'.
Error: L6248E: _main_redirect.o(.text) in PI region 'ER_RO' cannot have address type relocation to __stdout in PI region 'ER_ZI'.
Error: L6248E: stdio.o(.text) in PI region 'ER_RO' cannot have address type relocation to .bss$2 in PI region 'ER_ZI'.
Error: L6248E: stdio.o(.text) in PI region 'ER_RO' cannot have address type relocation to .bss$2 in PI region 'ER_ZI'.
Error: L6248E: fflush.o(.text) in PI region 'ER_RO' cannot have address type relocation to __stdin in PI region 'ER_ZI'.
Finished: 0 information, 0 warning and 9 error messages.

[sxcnfly]

当然有的FSIN,FCOS就是，不能用标准C库的任何函数，你这个编译错误是地址无法重定位导致的。

[半吊子全栈工匠]

要自己重写的

[路飞-总裁]

是啊，要重写的。

[sxcnfly]

[Quote=引用 3 楼 kuangyeren_ai 的回复:]
是啊，要重写的。
[/Quote]
楼上二位还停留在Brew2.x时代，Brew3.x已经提供了FSIN, FCOS助手函数，呵呵。

[bjamosgavin]

[Quote=引用 4 楼 sxcnfly 的回复:]
引用 3 楼 kuangyeren_ai 的回复:
是啊，要重写的。

楼上二位还停留在Brew2.x时代，Brew3.x已经提供了FSIN, FCOS助手函数，呵呵。
[/Quote]

256*FCOS(90)= -114
这个函数根本不准确！！你没试过吗？？