22 lines
601 B
Plaintext
22 lines
601 B
Plaintext
dnl $Id: have-struct-field.m4 18314 2006-10-07 17:31:56Z lha $
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dnl
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dnl check for fields in a structure
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dnl
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dnl AC_HAVE_STRUCT_FIELD(struct, field, headers)
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AC_DEFUN([AC_HAVE_STRUCT_FIELD], [
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define(cache_val, translit(ac_cv_type_$1_$2, [A-Z ], [a-z_]))
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AC_CACHE_CHECK([for $2 in $1], cache_val,[
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$3]],
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[[$1 x; memset(&x, 0, sizeof(x)); x.$2]])],
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[cache_val=yes],
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[cache_val=no])
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])
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if test "$cache_val" = yes; then
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define(foo, translit(HAVE_$1_$2, [a-z ], [A-Z_]))
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AC_DEFINE(foo, 1, [Define if $1 has field $2.])
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undefine([foo])
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fi
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undefine([cache_val])
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])
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