This file is indexed.

/usr/src/gcc-4.6/debian/runcheck.sh is in gcc-4.6-source 4.6.4-6ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#! /bin/sh

mkdir -p build

cat >build/runcheck.c <<EOF
#include <stdio.h>
int main()
{
	return printf("yes\n") != 4;
}
EOF

if m=$(${CC:-gcc} -o build/runcheck build/runcheck.c 2>&1); then
    m=$(build/runcheck 2>&1)
    echo ${m#* } > build/runcheck.out
    echo ${m#* }
else
    echo ${m##*:} > build/runcheck.out
    echo ${m##*:}
fi