| #!/bin/sh -eu | |
| # SPDX-License-Identifier: GPL-2.0 | |
| tmp_file=$(mktemp) | |
| trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT | |
| cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1 | |
| void *p = &p; | |
| END | |
| # ld.lld before 15 did not support -z pack-relative-relocs. | |
| if ! $LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr -o $tmp_file 2>/dev/null; then | |
| $LD $tmp_file.o -shared -Bsymbolic -z pack-relative-relocs -o $tmp_file 2>&1 | | |
| grep -q pack-relative-relocs && exit 1 | |
| fi | |
| # Despite printing an error message, GNU nm still exits with exit code 0 if it | |
| # sees a relr section. So we need to check that nothing is printed to stderr. | |
| test -z "$($NM $tmp_file 2>&1 >/dev/null)" | |
| $OBJCOPY -O binary $tmp_file $tmp_file.bin |