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comparison src/configure.ac @ 13728:603516b73349 v8.0.1736

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patch 8.0.1736: check for C99 features is incomplete commit https://github.com/vim/vim/commit/226400830b470774bf5a552e1af10706b609720c Author: Bram Moolenaar <Bram@vim.org> Date: Thu Apr 19 20:39:41 2018 +0200 patch 8.0.1736: check for C99 features is incomplete Problem: Check for C99 features is incomplete. Solution: Use AC_PROG_CC_C99 and when C99 isn't fully supported check the features we need. (James McCoy, closes #2820)
author Christian Brabandt <cb@256bit.org>
date Thu, 19 Apr 2018 20:45:06 +0200
parents d35b1702a1da
children 9ae15cd46d84
comparison
equal deleted inserted replaced
13727:2b3a864b3138 13728:603516b73349
9 dnl Being able to run configure means the system is Unix (compatible). 9 dnl Being able to run configure means the system is Unix (compatible).
10 AC_DEFINE(UNIX) 10 AC_DEFINE(UNIX)
11 AC_PROG_MAKE_SET 11 AC_PROG_MAKE_SET
12 12
13 dnl Checks for programs. 13 dnl Checks for programs.
14 AC_PROG_CC_C89 dnl required by almost everything 14 AC_PROG_CC_C99 dnl required by almost everything
15 AC_PROG_CPP dnl required by header file checks 15 AC_PROG_CPP dnl required by header file checks
16 AC_PROGRAM_EGREP dnl required by AC_EGREP_CPP 16 AC_PROGRAM_EGREP dnl required by AC_EGREP_CPP
17 AC_PROG_FGREP dnl finds working grep -F 17 AC_PROG_FGREP dnl finds working grep -F
18 AC_ISC_POSIX dnl required by AC_C_CROSS 18 AC_ISC_POSIX dnl required by AC_C_CROSS
19 AC_PROG_AWK dnl required for "make html" in ../doc 19 AC_PROG_AWK dnl required for "make html" in ../doc
28 dnl in autoconf needs it, where it uses STDC_HEADERS. 28 dnl in autoconf needs it, where it uses STDC_HEADERS.
29 AC_HEADER_STDC 29 AC_HEADER_STDC
30 AC_HEADER_SYS_WAIT 30 AC_HEADER_SYS_WAIT
31 31
32 dnl Check that the C99 features that Vim uses are supported: 32 dnl Check that the C99 features that Vim uses are supported:
33 dnl - // commands 33 if test x"$ac_cv_prog_cc_c99" != xno; then
34 dnl - comma after last enum item 34 dnl If the compiler doesn't explicitly support C99, then check
35 dnl - "long long int" and "long long unsigned" 35 dnl for the specific features Vim uses
36 dnl - flexible array member 36
37 AC_MSG_CHECKING(if the compiler can handle Vim code) 37 AC_TYPE_LONG_LONG_INT
38 AC_TRY_COMPILE([#include <stdio.h>], [ 38 if test "$ac_cv_type_long_long_int" = no; then
39 enum { 39 AC_MSG_FAILURE([Compiler does not support long long int])
40 one, // one comment 40 fi
41 two, // two comments 41
42 three, // three comments 42 AC_MSG_CHECKING([if the compiler supports trailing commas])
43 }; 43 trailing_commas=no
44 long long int a = 1; 44 AC_TRY_COMPILE([], [
45 long long unsigned b = 2; 45 enum {
46 printf("a %lld and a %llu", a, b); 46 one,
47 ], 47 };],
48 AC_MSG_RESULT(yes), 48 [AC_MSG_RESULT(yes); trailing_commas=yes],
49 AC_MSG_ERROR([compiler does not work properly - see auto/config.log])) 49 [AC_MSG_RESULT(no)])
50 if test "$trailing_commas" = no; then
51 AC_MSG_FAILURE([Compiler does not support trailing comma in enum])
52 fi
53
54 AC_MSG_CHECKING([if the compiler supports C++ comments])
55 slash_comments=no
56 AC_TRY_COMPILE([],
57 [// C++ comments?],
58 [AC_MSG_RESULT(yes); slash_comments=yes],
59 [AC_MSG_RESULT(no)])
60 if test "$slash_comments" = no; then
61 AC_MSG_FAILURE([Compiler does not support C++ comments])
62 fi
63 fi
50 64
51 dnl Check for the flag that fails if stuff are missing. 65 dnl Check for the flag that fails if stuff are missing.
52 66
53 AC_MSG_CHECKING(--enable-fail-if-missing argument) 67 AC_MSG_CHECKING(--enable-fail-if-missing argument)
54 AC_ARG_ENABLE(fail_if_missing, 68 AC_ARG_ENABLE(fail_if_missing,