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| author | Kevin Cernekee <cernekee@google.com> | 2015-02-11 15:22:56 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2015-02-11 15:47:45 -0800 |
| commit | 14acd1e1a03ed90a4fc09f263edbbdc3ed712012 (patch) | |
| tree | f54d31549308d5627c9b1d21b5ee507220bd3399 /m4 | |
| parent | f1514e591d047866c1a8c25c27d8ab5614a681c5 (diff) | |
| download | gnulib-14acd1e1a03ed90a4fc09f263edbbdc3ed712012.tar.gz | |
net_if: Handle content-free <net/if.h> system headers
* m4/net_if_h.m4: Check to make sure <net/if.h> actually defines
struct if_nameindex. If not, enable the replacement header.
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/net_if_h.m4 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/m4/net_if_h.m4 b/m4/net_if_h.m4 index b6ebc73337..9db391c5fe 100644 --- a/m4/net_if_h.m4 +++ b/m4/net_if_h.m4 @@ -9,7 +9,8 @@ AC_DEFUN([gl_HEADER_NET_IF], AC_CACHE_CHECK([whether <net/if.h> is self-contained], [gl_cv_header_net_if_h_selfcontained], [ - AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <net/if.h>]], [[]])], + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <net/if.h>]], + [[struct if_nameindex ni;]])], [gl_cv_header_net_if_h_selfcontained=yes], [gl_cv_header_net_if_h_selfcontained=no]) ]) |