forked from old/legacy-imlib2
autofoo: Add __PACKED__ for optional struct packing
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@ -259,6 +259,7 @@ AM_CONDITIONAL(BUILD_DOC, test "$enable_doc_build" = "yes")
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EC_C_WARNINGS()
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EC_C_VISIBILITY(yes)
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EC_C_PACKING()
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EC_C_ASAN()
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VERSION_MAJOR=`echo $VERSION | awk -F. '{print $1}'`
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@ -328,6 +329,7 @@ echo
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echo "Include filters...........: $enable_filters"
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echo "Include text functions....: $enable_text"
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echo "Use visibility hiding.....: $enable_visibility_hiding"
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echo "Use struct packing........: $enable_packing"
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echo
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echo "Installation path.........: $prefix"
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echo
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@ -0,0 +1,23 @@
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dnl Copyright (C) 2023 Kim Woelders
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dnl This code is public domain and can be freely used or copied.
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dnl Macro to define __PACKED__ if supported and --enable-packing is given
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dnl Usage: EC_C_PACKING()
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AC_DEFUN([EC_C_PACKING], [
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AC_ARG_ENABLE([packing],
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[AS_HELP_STRING([--enable-packing],
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[enable packing structures for unaligned access @<:@default=no@:>@])],,
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[enable_packing=no])
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if test "x$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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