| AC_DEFUN([LIBUNWIND___THREAD], |
| [dnl Check whether the compiler supports the __thread keyword. |
| if test "x$enable___thread" != xno; then |
| AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, |
| [cat > conftest.c <<\EOF |
| __thread int a = 42; |
| EOF |
| if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then |
| libc_cv_gcc___thread=yes |
| else |
| libc_cv_gcc___thread=no |
| fi |
| rm -f conftest*]) |
| if test "$libc_cv_gcc___thread" = yes; then |
| AC_DEFINE(HAVE___THREAD, 1, |
| [Define to 1 if __thread keyword is supported by the C compiler.]) |
| fi |
| else |
| libc_cv_gcc___thread=no |
| fi]) |
| |
| AC_DEFUN([CHECK_ATOMIC_OPS], |
| [dnl Check whether the system has the atomic_ops package installed. |
| AC_CHECK_HEADERS(atomic_ops.h) |
| # |
| # Don't link against libatomic_ops for now. We don't want libunwind |
| # to depend on libatomic_ops.so. Fortunately, none of the platforms |
| # we care about so far need libatomic_ops.a (everything is done via |
| # inline macros). |
| # |
| # AC_CHECK_LIB(atomic_ops, main) |
| ]) |