Mercurial > vim
diff src/configure.ac @ 13716:30f9ebe3e602 v8.0.1730
patch 8.0.1730: no configure check for the used C99 features
commit https://github.com/vim/vim/commit/561f8a5a4612751c2a4ebd6bf918cbc3be867350
Author: Bram Moolenaar <Bram@vim.org>
Date: Tue Apr 17 22:02:45 2018 +0200
patch 8.0.1730: no configure check for the used C99 features
Problem: No configure check for the used C99 features.
Solution: Add a compilation check. Tentatively document C99 features.
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Tue, 17 Apr 2018 22:15:07 +0200 |
| parents | 7152032191d7 |
| children | d35b1702a1da |
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--- a/src/configure.ac +++ b/src/configure.ac @@ -29,6 +29,29 @@ dnl in autoconf needs it, where it uses AC_HEADER_STDC AC_HEADER_SYS_WAIT +dnl Check that the C99 features that Vim uses are supported: +dnl - // commands +dnl - comma after last enum item +dnl - "long long int" and "long long unsigned" +dnl - flexible array member +AC_MSG_CHECKING(if the compiler can handle Vim code) +AC_TRY_COMPILE([#include <stdio.h>], [ + struct with_flexible_member { + int count; // comment + char text[]; // another comment + }; + enum { + one, + two, + three, + }; + long long int a = 1; + long long unsigned b = 2; + printf("a %lld and a %llu", a, b); + ], +AC_MSG_RESULT(yes), +AC_MSG_ERROR([compiler does not work properly - see auto/config.log])) + dnl Check for the flag that fails if stuff are missing. AC_MSG_CHECKING(--enable-fail-if-missing argument)