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#!/bin/sh
cat >myctest.c <<END
#include<stdio.h>
#include<stdint.h>
union u{
int32_t l;
char c[4];
};
int main(int argc, char *argv[])
{
union u val;
printf("%ld ",sizeof(int32_t));
printf("%ld ",sizeof(int16_t));
printf("%ld ",sizeof(int));
val.l=1L;
if (val.c[3]==1)
puts("BIG");
else
puts("LITTLE");
}
END
gcc -std=gnu99 myctest.c -o myctest
rm myctest.c
if [ `./myctest |cut -d' ' -f 1` != 4 ]
then echo "Error : sizeof(long)!=4"
fi
if [ `./myctest |cut -d' ' -f 2` != 2 ]
then echo "Error : sizeof(short)!=2"
fi
if [ `./myctest |cut -d' ' -f 3` != 4 ]
then echo "Error :sizeof(int)!=4"
fi
if [ `./myctest |cut -d' ' -f 4` = LITTLE ]
then
echo "#ifndef LITT_ENDIAN" >defendian.h
echo "#define LITT_ENDIAN 1" >>defendian.h
echo "#endif /* LITT_ENDIAN */" >>defendian.h
echo Little Endian machine detected
else
echo "#ifndef LITT_ENDIAN" >defendian.h
echo "#endif /* LITT_ENDIAN */" >>defendian.h
echo Big Endian machine detected
fi
if [ -f myctest.exe ]; then
rm myctest.exe
fi
if [ -f myctest ]; then
rm myctest
fi
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