#!/bin/bash
export LC_ALL=C
set -e
CC="${TEST_CC:-cc}"
CXX="${TEST_CXX:-c++}"
GCC="${TEST_GCC:-gcc}"
GXX="${TEST_GXX:-g++}"
OBJDUMP="${OBJDUMP:-objdump}"
MACHINE="${MACHINE:-$(uname -m)}"
testname=$(basename "$0" .sh)
echo -n "Testing $testname ... "
cd "$(dirname "$0")"/../..
t=out/test/elf/$testname
mkdir -p $t

cat <<EOF | $CC -o $t/a.o -ffunction-sections -c -xc -
#include <stdio.h>
int main() {
  printf("Hello world\n");
}
EOF

# Create a lot of sections to lower the probability that
# we get the identical output as a result of shuffling.
for i in `seq 1 1000`; do echo "void fn$i() {}"; done | \
  $CC -o $t/b.o -ffunction-sections -c -xc -

$CC -B. -o $t/exe1 $t/a.o $t/b.o
$QEMU $t/exe1 | grep -q 'Hello world'

$CC -B. -o $t/exe2 $t/a.o $t/b.o -Wl,-shuffle-sections=42
$QEMU $t/exe2 | grep -q 'Hello world'

$CC -B. -o $t/exe3 $t/a.o $t/b.o -Wl,-shuffle-sections=42
$QEMU $t/exe3 | grep -q 'Hello world'

$CC -B. -o $t/exe4 $t/a.o $t/b.o -Wl,-shuffle-sections=5
$QEMU $t/exe4 | grep -q 'Hello world'

! diff $t/exe1 $t/exe2 >& /dev/null || false
diff $t/exe2 $t/exe3
! diff $t/exe3 $t/exe4 >& /dev/null || false

echo OK
