a25439b686
Reviewed by: delphij (suggested MFC) Approved by: roberto Security: CVE-2015-1798, CVE-2015-1799 Security: VuXML ebd84c96-dd7e-11e4-854e-3c970e169bc2 MFC after: 1 month
60 lines
1.6 KiB
Plaintext
60 lines
1.6 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_c99_struct_init.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_C99_STRUCT_INIT
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#
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# DESCRIPTION
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#
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# This macro defines MISSING_C99_STRUCT_INIT if the C compiler does not
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# supports the C99 tagged structure initialization.
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#
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# Given: struct foo_s {int i1; int i2; int i3;};
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# one can write:
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# #if !define(MISSING_C99_STRUCT_INIT)
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# # define FOO_INIT(a, b, c) { .i1 = a, .i2 = b, .i3 = c }
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# #else
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# # define FOO_INIT(a, b, c) { a, b, c }
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#
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# static struct foo_s foo[] = {
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# FOO_INIT(1, 1, 1),
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# FOO_INIT(2, 2, 2),
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# FOO_INIT(0, 0, 0)
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# };
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#
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# LICENSE
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#
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# Copyright (c) 2015 Network Time Foundation
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#
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# Author: Harlan Stenn <stenn@nwtime.org>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 1
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AC_DEFUN([AX_C99_STRUCT_INIT], [
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AC_MSG_CHECKING([whether the compiler supports C99 structure initialization])
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AC_REQUIRE([AC_PROG_CC_C99])
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AC_LANG_PUSH([C])
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dnl AC_LINK_IFELSE?
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AC_COMPILE_IFELSE(
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[AC_LANG_SOURCE([[
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struct foo_s {int i1; int i2;};
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int main() { struct foo_s foo[] = { { .i1 = 1, .i2 = 1 }, { .i1 = 2, .i2 = 2 }, { .i1 = 0, .i2 = 0 } }; }
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]])],
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no])
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AC_DEFINE([MISSING_C99_STRUCT_INIT], [1],
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[Define to 1 if the compiler does not support C99's structure initialization.]),
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)
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AC_LANG_POP([C])
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]);
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