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)
|
])
|
|
# ANDROID support update.
|
AC_DEFUN([CHECK_ANDROID],
|
[dnl Check whether the system has __ANDROID__ defined.
|
if test "x$enable_conserve_stack" != xno; then
|
AC_CACHE_CHECK([for __ANDROID__], ac_cv_android,
|
[cat > conftest.c <<\EOF
|
#if !defined(__ANDROID__)
|
value = fail
|
#endif
|
EOF
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
|
ac_cv_android=yes
|
else
|
ac_cv_android=no
|
fi
|
rm -f conftest*])
|
if test "$ac_cv_android" = yes; then
|
AC_DEFINE([CONSERVE_STACK], [],
|
[Allocate large structures rather than place them on the stack.])
|
fi
|
else
|
ac_cv_android=no
|
fi])
|
# End of ANDROID update.
|
