2
# Some Linux machines run a 64-bit kernel with a 32-bit userspace. 'uname -m'
3
# shows these as x86_64. Ask the system 'gcc' what it thinks.
5
AC_DEFUN([AC_IS_LINUX_MIXED],
6
[AC_CACHE_CHECK(for 32-bit userspace on 64-bit system,llvm_cv_linux_mixed,
8
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
10
error: Not x86-64 even if uname says so!
13
[llvm_cv_linux_mixed=no],
14
[llvm_cv_linux_mixed=yes])