2018-01-20 02:14:59 -05:00
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# -*- Autoconf -*-
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2018-01-20 02:05:25 -05:00
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dnl RUBY_DECL_ATTRIBUTE(attrib, macroname, cachevar, condition, type, code)
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AC_DEFUN([RUBY_DECL_ATTRIBUTE], [dnl
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m4_ifval([$2], dnl
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[AS_VAR_PUSHDEF([attrib], m4_bpatsubst([$2], [(.*)], []))], dnl
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[AS_VAR_PUSHDEF([attrib], m4_toupper(m4_format(%.4s, [$5]))[_]AS_TR_CPP($1))] dnl
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)dnl
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m4_ifval([$3], dnl
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[AS_VAR_PUSHDEF([rbcv],[$3])], dnl
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[AS_VAR_PUSHDEF([rbcv],[rb_cv_]m4_format(%.4s, [$5])[_][$1])]dnl
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)dnl
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m4_pushdef([attrib_code],[m4_bpatsubst([$1],["],[\\"])])dnl
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m4_pushdef([attrib_params],[m4_bpatsubst([$2(x)],[^[^()]*(\([^()]*\)).*],[\1])])dnl
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m4_ifval([$4], [rbcv_cond=["$4"]; test "$rbcv_cond" || unset rbcv_cond])
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AC_CACHE_CHECK(for m4_ifval([$2],[m4_bpatsubst([$2], [(.*)], [])],[$1]) [$5] attribute, rbcv, dnl
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[rbcv=x
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RUBY_WERROR_FLAG([
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for mac in \
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"__attribute__ ((attrib_code)) x" \
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"x __attribute__ ((attrib_code))" \
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"__declspec(attrib_code) x" \
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x; do
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m4_ifval([$4],mac="$mac"${rbcv_cond+" /* only if $rbcv_cond */"})
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AC_TRY_COMPILE(
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m4_ifval([$4],${rbcv_cond+[@%:@if ]$rbcv_cond})
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[@%:@define ]attrib[](attrib_params)[ $mac]
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m4_ifval([$4],${rbcv_cond+[@%:@else]}
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${rbcv_cond+[@%:@define ]attrib[](attrib_params)[ x]}
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${rbcv_cond+[@%:@endif]})
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$6
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@%:@define mesg ("")
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attrib[](attrib_params)[;], [],
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[rbcv="$mac"; break])
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done
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])])
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AS_IF([test "$rbcv" != x], [
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RUBY_DEFINE_IF(m4_ifval([$4],[${rbcv_cond}]), attrib[](attrib_params)[], $rbcv)
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])
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m4_ifval([$4], [unset rbcv_cond]) dnl
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m4_popdef([attrib_params])dnl
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m4_popdef([attrib_code])dnl
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AS_VAR_POPDEF([attrib])dnl
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AS_VAR_POPDEF([rbcv])dnl
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])dnl
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