forked from old/legacy-imlib2
24 lines
766 B
Plaintext
24 lines
766 B
Plaintext
dnl Copyright (C) 2023 Kim Woelders
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dnl This code is public domain and can be freely used or copied.
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dnl Macro to define __PACKED__ if supported and --enable-packing is given
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dnl Usage: EC_C_PACKING()
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AC_DEFUN([EC_C_PACKING], [
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AC_ARG_ENABLE([packing],
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[AS_HELP_STRING([--enable-packing],
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[enable packing structures for unaligned access @<:@default=no@:>@])],,
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[enable_packing=no])
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if test "x$enable_packing" = "xyes"; then
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if test -n "$GCC"; then
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AC_DEFINE(__PACKED__, __attribute__((packed)), [Use struct packing for unaligned access])
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else
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AC_MSG_ERROR([Struct packing was requested but no method is known])
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fi
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else
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AC_DEFINE(__PACKED__, , [Not using struct packing for unaligned access])
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fi
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])
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