18 lines
671 B
Diff
18 lines
671 B
Diff
--- a/cf/check-var.m4 2013-04-24 20:07:35.000000000 -0600
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+++ b/cf/check-var.m4 2020-01-07 11:36:36.493955390 -0700
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@@ -6,12 +6,12 @@ AC_MSG_CHECKING(for $1)
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AC_CACHE_VAL(ac_cv_var_$1, [
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m4_ifval([$2],[
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
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- void * foo(void) { return &$1; }]],[[foo()]])],
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+ __attribute__ ((used)) void * foo(void) { return &$1; }]],[[foo()]])],
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[ac_cv_var_$1=yes],[ac_cv_var_$1=no])])
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if test "$ac_cv_var_$1" != yes ; then
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[$2
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extern int $1;
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-int foo(void) { return $1; }]],[[foo()]])],
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+__attribute__ ((used)) int foo(void) { return $1; }]],[[foo()]])],
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[ac_cv_var_$1=yes],[ac_cv_var_$1=no])
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fi
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])
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