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Diffstat (limited to 'm4/flexible_array_member.m4')
| -rw-r--r-- | m4/flexible_array_member.m4 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/m4/flexible_array_member.m4 b/m4/flexible_array_member.m4 new file mode 100644 index 0000000..10fea3b --- /dev/null +++ b/m4/flexible_array_member.m4 @@ -0,0 +1,25 @@ +dnl Our implementation of AC_C_FLEXIBLE_ARRAY_MEMBER. +dnl Use it until autoconf 2.61+ becomes more widely used +AC_DEFUN([DOVECOT_C_FLEXIBLE_ARRAY_MEMBER], [ + AC_CACHE_CHECK([if we can use C99-like flexible array members],i_cv_c99_flex_arrays,[ + AC_TRY_COMPILE([ + struct foo { + int x; + char y[]; + }; + ], [ + struct foo foo; + ], [ + i_cv_c99_flex_arrays=yes + ], [ + i_cv_c99_flex_arrays=no + ]) + ]) + + if test $i_cv_c99_flex_arrays = yes; then + flexible_value= + else + flexible_value=1 + fi + AC_DEFINE_UNQUOTED(FLEXIBLE_ARRAY_MEMBER, $flexible_value, [How to define flexible array members in structs]) +]) |