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40 lines
1.0 KiB
Plaintext
40 lines
1.0 KiB
Plaintext
dnl ######################################################################
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dnl check if compiler can handle variable-length argument macros
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AC_DEFUN([AMU_VARARGS_MACROS],
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[
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AC_CACHE_CHECK(if compiler can handle variable-length macros,
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ac_cv_varargs_macros,
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[
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# try C99 style
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AC_TRY_COMPILE(
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[
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#define foo(str,size,fmt,...) bar(__FILE__,__LINE__,(str),(size),(fmt),__VA_ARGS__)
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],
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[
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char a[80];
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foo(a, sizeof(a), "%d,%d", 1, 2);
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], ac_cv_varargs_macros=c99,
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# else try gcc style
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AC_TRY_COMPILE(
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[
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#define foo(str,size,args...) bar(__FILE__,__LINE__,(str),(size),(fmt),args)
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],
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[
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char a[80];
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foo(a, sizeof(a), "%d,%d", 1, 2);
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], ac_cv_varargs_macros=gcc, ac_cv_varargs_macros=none))
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])
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if test "$ac_cv_varargs_macros" = c99
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then
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AC_DEFINE(HAVE_C99_VARARGS_MACROS, 1,
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[System supports C99-style variable-length argument macros])
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else
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if test "$ac_cv_varargs_macros" = gcc
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then
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AC_DEFINE(HAVE_GCC_VARARGS_MACROS, 1,
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[System supports GCC-style variable-length argument macros])
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fi
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fi
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])
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dnl ======================================================================
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