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Diffstat (limited to 'm4/alignof.m4')
| -rw-r--r-- | m4/alignof.m4 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/m4/alignof.m4 b/m4/alignof.m4 new file mode 100644 index 0000000..a90475d --- /dev/null +++ b/m4/alignof.m4 @@ -0,0 +1,13 @@ +# +# lldp_CHECK_ALIGNOF +# +AC_DEFUN([lldp_CHECK_ALIGNOF],[ + AC_CACHE_CHECK([whether compiler understands __alignof__], lldp_cv_check_alignof, [ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ return __alignof__(long); ]])], + [ lldp_cv_check_alignof="yes" ], + [ lldp_cv_check_alignof="no" ]) + ]) + if test x"$lldp_cv_check_alignof" = x"yes"; then + AC_DEFINE([HAVE_ALIGNOF], [1], [Define if __alignof__ operator is available]) + fi +]) |