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configure.ac: remove detection of WARN_UNUSED_RESULT

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spice configure.ac has some code to detect if the compiler has
a special attribute to tag some functions so that they generate a
warning when their return value isn't checked. However, this test
is broken (the gcc attribute name is "warn_unused_result", not
"__warn_unused_result__" and WARN_UNUSED_RESULT is unused anyway
since spice-protocol provides SPICE_GNUC_WARN_UNUSED_RESULT. Thus
we can just drop that block of code from configure.ac
This commit is contained in:
Christophe Fergeau 2011-04-01 18:19:12 +02:00 committed by Hans de Goede
parent 5dd6932bf7
commit d3463ae9af
1 changed files with 0 additions and 14 deletions
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14
configure.ac
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@ -459,20 +459,6 @@ if test $os_win32 == "yes" ; then
AC_SUBST(WINDRES)
fi
# We only wish to enable attribute(warn_unused_result) if we can prevent
# gcc from generating thousands of warnings about the misapplication of the
# attribute to void functions and variables.
AC_MSG_CHECKING([how to enable unused result warnings])
warn_unused_result=""
if echo $WARN_CFLAGS | grep -e '-Wno-attributes' >/dev/null; then
AC_TRY_COMPILE([__attribute__((__warn_unused_result__))
int f (int i) { return i; }], [],
[warn_unused_result="__attribute__((__warn_unused_result__))"])
fi
AC_DEFINE_UNQUOTED([WARN_UNUSED_RESULT], [$warn_unused_result],
[Define to the value your compiler uses to support the warn-unused-result attribute])
AC_MSG_RESULT([$warn_unused_result])
AC_SUBST(WARN_CFLAGS)
AC_SUBST(CFLAGS_CFLAGS)