[Buildroot] ARM release compiler broken for mpg123.

* [Buildroot] ARM release compiler broken for mpg123.
@ 2009-01-23 15:10 Ulf Samuelsson
  2009-01-23 20:37 ` Peter Korsgaard
  0 siblings, 1 reply; 3+ messages in thread
From: Ulf Samuelsson @ 2009-01-23 15:10 UTC (permalink / raw)
  To: buildroot

?Have been struggling with mpg123 last night.
There seems to be a bug in the release version
(gcc-4.3.2/bu-2-19/uclibc-0.9.30)
of the toolchain which creates a Segment violation.

Anyone else can build mpg123, maybe for another architecture?
I have found an upstream patch, which I will test
and apply if it seems to solve the problem.

Reproduce using:

$ arm-linux-uclibc-gcc -Os -funroll-all-loops layer2.c

layer2.c:
-----------------------------------------------

#define FAIL
//#define WORKAROUND

struct al_table 
{
#if defined(FAIL)
  short bits;
#endif
  short d;
};

int getd_val;
int xd1;

struct al_table *alloc2;

void getd(void)
{
getd_val = alloc2->d;
}

int main(void)
{
int d1;

#if defined(WORKAROUND)
getd();
d1 = getd_val;
#else
d1 = alloc2->d;
#endif

#if defined(FAIL)
if( (d1) < 0)         {
xd1 = d1;
}
#else
xd1 = d1;
#endif
}

---------------------------------------

BR
Ulf Samuelsson

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