arm_sve.h depends on stdint.h but that relies on libc headers unless
compiled in freestanding mode. Without this change a bootstrap glibc
build (that uses a compiler without installed libc headers) failed with
checking for availability of SVE ACLE... In file included from [...]/arm_sve.h:28,
from conftest.c:1:
[...]/stdint.h:9:16: fatal error: stdint.h: No such file or directory
9 | # include_next <stdint.h>
| ^~~~~~~~~~
compilation terminated.
configure: error: mathvec is enabled but compiler does not have SVE ACLE. [...]
cat > conftest.c <<EOF
#include <arm_sve.h>
EOF
- if ! ${CC-cc} conftest.c -fsyntax-only; then
+ if ! ${CC-cc} conftest.c -fsyntax-only -ffreestanding; then
as_fn_error 1 "mathvec is enabled but compiler does not have SVE ACLE. Either use a compatible compiler or configure with --disable-mathvec (this results in incomplete ABI)."
fi
rm conftest.c
cat > conftest.c <<EOF
#include <arm_sve.h>
EOF
- if ! ${CC-cc} conftest.c -fsyntax-only; then
+ if ! ${CC-cc} conftest.c -fsyntax-only -ffreestanding; then
as_fn_error 1 "mathvec is enabled but compiler does not have SVE ACLE. Either use a compatible compiler or configure with --disable-mathvec (this results in incomplete ABI)."
fi
rm conftest.c