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Warning 167(-D) on const type * versus type *

Peter Goderie over 13 years ago

I have a sourcecode like:

typedef int tQ32_16;
typedef tQ32_16 tVector3[3];

tQ32_16 Length_V3(const tVector3 * vec) {....;}

void anyfunc(void)
{

tVector3 v1 = {1,2,3}; tQ32_16 l1;

l1 = Length_V3(&v1); //==>> warning: #167-D: argument of type "tVector3 *" is incompatible with parameter of type "const tVector3 *"

....
}

Why do I get this warning ??
As far as I know this is correct C-code....

Parents

0 Peter Goderie over 13 years ago in reply to Mike Kleshov

I just created a NEW uVision project (MDK-ARM Professional v4.50)

TARGET: NXP LPC1313, everyting else just default.

and added just the following code (main.c):


typedef int tQ32_16;
typedef tQ32_16 tVector3[3];

tQ32_16 Length_V3(const tVector3 * vec)
{
    tQ32_16 result = (*vec)[0];

    return result;
}

int main(void)
{
    tVector3 v1 = {1,2,3};
    tQ32_16  l1;

    l1 = Length_V3(&v1);

    return l1;
}

And when I compile I get the following output:

Build target 'Target 1'
compiling main.c...
main.c(17): warning:  #167-D: argument of type "tVector3 *" is incompatible with parameter of type "const tVector3 *"
main.c: warning: #167-D: argument of type "tVector3 *" is incompatible with parameter of type "const tVector3 *"
linking...
warn167_test.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_lpc13xx.o).
Target not created

Reply

0 Peter Goderie over 13 years ago in reply to Mike Kleshov

I just created a NEW uVision project (MDK-ARM Professional v4.50)

TARGET: NXP LPC1313, everyting else just default.

and added just the following code (main.c):


typedef int tQ32_16;
typedef tQ32_16 tVector3[3];

tQ32_16 Length_V3(const tVector3 * vec)
{
    tQ32_16 result = (*vec)[0];

    return result;
}

int main(void)
{
    tVector3 v1 = {1,2,3};
    tQ32_16  l1;

    l1 = Length_V3(&v1);

    return l1;
}

And when I compile I get the following output:

Build target 'Target 1'
compiling main.c...
main.c(17): warning:  #167-D: argument of type "tVector3 *" is incompatible with parameter of type "const tVector3 *"
main.c: warning: #167-D: argument of type "tVector3 *" is incompatible with parameter of type "const tVector3 *"
linking...
warn167_test.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_lpc13xx.o).
Target not created

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