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C99 flexible array support

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git-svn-id: file:///home/jj/hercules.svn/trunk@3938 956126f8-22a0-4046-8f4a-272fa8102e63
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Fish (David B Trout)
2006-08-16 17:17:31 +00:00
parent 18ea03d96b
commit 9077f8751d
7 changed files with 114 additions and 0 deletions
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67
autoconf/hercules.m4
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@@ -6,6 +6,73 @@
#
##############################################################################
#-----------------------------------------------------------------------------
#
# Macro: HC_C99_FLEXIBLE_ARRAYS()
#
# Checks whether or not the compiler supports C99 flexible arrays
#
# Parms: None
# Input: Nothing
# Output: $hc_cv_c99_flexible_array,
# AC_DEFINE() for 'C99_FLEXIBLE_ARRAYS' if yes.
# Note: Since AC_DEFINE() might be issued, a corresponding
# AH_TEMPLATE() for 'C99_FLEXIBLE_ARRAYS' is of course
# also needed somewhere in configure.ac
#
# Credit: Modeled after 'AC_C99_FLEXIBLE_ARRAY' macro copyright
# by Erik de Castro Lopo <erikd AT mega-nerd DOT com>:
#
# "Permission to use, copy, modify, distribute,
# and sell this file for any purpose is hereby
# granted without fee, provided that the above
# copyright and this permission notice appear
# in all copies. No representations are made
# about the suitability of this software for any
# purpose. It is provided "as is" without express
# or implied warranty."
#
#-----------------------------------------------------------------------------
AC_DEFUN([HC_C99_FLEXIBLE_ARRAYS],
[
AC_CACHE_CHECK( C99 struct flexible arrays support,
[hc_cv_c99_flexible_array],
[
# Initialize to unknown
hc_cv_c99_flexible_array=no
AC_TRY_LINK(
[[
#include <stdlib.h>
typedef struct
{
int foo;
char bar[];
}
FOOBAR;
]],
[
int main(int argc, char *argv[])
{
FOOBAR* p = calloc( 1, sizeof(FOOBAR) + 16 );
return 0;
}
],
[hc_cv_c99_flexible_array=yes],
[hc_cv_c99_flexible_array=no]
)
]
)
if test "$hc_cv_c99_flexible_array" = "yes"; then
AC_DEFINE([C99_FLEXIBLE_ARRAYS])
fi
])
#-----------------------------------------------------------------------------
#
# Macro: HC_PROG_CC() ((((( DEPRECATED )))))