diff options
Diffstat (limited to 'm4/extensions.m4')
| -rw-r--r-- | m4/extensions.m4 | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/m4/extensions.m4 b/m4/extensions.m4 index f7333acbd4f..5792a9557a8 100644 --- a/m4/extensions.m4 +++ b/m4/extensions.m4 @@ -1,4 +1,4 @@ -# serial 21 -*- Autoconf -*- +# serial 22 -*- Autoconf -*- # Enable extensions on systems that normally disable them. # Copyright (C) 2003, 2006-2021 Free Software Foundation, Inc. @@ -212,4 +212,16 @@ dnl it should only be defined when necessary. AC_DEFUN_ONCE([gl_USE_SYSTEM_EXTENSIONS], [ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + + dnl On OpenBSD 6.8 with GCC, the include files contain a couple of + dnl definitions that are only activated with an explicit -D_ISOC11_SOURCE. + dnl That's because this version of GCC (4.2.1) supports the option + dnl '-std=gnu99' but not the option '-std=gnu11'. + AC_REQUIRE([AC_CANONICAL_HOST]) + case "$host_os" in + openbsd*) + AC_DEFINE([_ISOC11_SOURCE], [1], + [Define to enable the declarations of ISO C 11 types and functions.]) + ;; + esac ]) |