[linuxsh-dev] More .hidden problems/confusion

[M. R. B. <mr...@0x...>]

.hidden doesn't work with libstdc++.  For example, if I compile and link a
simple C++ program using unsigned integer division:

#include <stdio.h>

int main(void) {
	unsigned int a, b, c;

	printf("Hello, world\n");

	a = 4; b = 4;
	c = a / b;

	return --c;
}

I get an undefined reference to __udivsi3_i4 at runtime when using the
default shared libraries.

If I back out the portion of kaz's patch that enables hidden, it executes
normally.  Can someone point me to a testcase where .hidden actually does
something useful?

So far, I've only gotten this with libstdc++ and by looking at the specs
file, all normal apps/libs link with -libgcc unless -shared or
-shared-libgcc are explicitly specified.

Oh yeah, one more note about the .hidden hack, if it's meant to "hide"
routines for shared libraries, it's implementors seemed to forget that the
majority of libgcc functinality is in gcc/libgcc2.c, and none of those
routines are "hidden".  There's gotta be a better work around than the
hidden hack, esp. since SH is the only arch that uses it.

On an unrelated note, has anyone had any problems including the std C++
headers in programs?  I get a bunch of `undefined' errors from the include
files in bits/.

I'm using the tools provided at ftp.m17n.org/pub/super-h/testing
(binutils-2.11.2 + patches, gcc-3.0.1 + patches, glibc-2.2.4 + patches).

M. R.