| Nick Lewycky | 558aef8 | 2009-09-29 05:40:45 +0000 | [diff] [blame] | 1 | # |
| 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. |
| 4 | # |
| 5 | AC_DEFUN([AC_IS_LINUX_MIXED], |
| 6 | [AC_CACHE_CHECK(for 32-bit userspace on 64-bit system,llvm_cv_linux_mixed, |
| 7 | [ AC_LANG_PUSH([C]) |
| 8 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM( |
| 9 | [[#ifndef __x86_64__ |
| 10 | error: Not x86-64 even if uname says so! |
| 11 | #endif |
| 12 | ]])], |
| 13 | [llvm_cv_linux_mixed=no], |
| 14 | [llvm_cv_linux_mixed=yes]) |
| 15 | AC_LANG_POP([C]) |
| 16 | ]) |
| 17 | ]) |