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Support inlining various small performance-critical functions on non-GCC

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compilers, by applying a configure check to see if the compiler will accept
an unreferenced "static inline foo ..." function without warnings.  It is
believed that such warnings are the only reason not to declare inlined
functions in headers, if the compiler understands "inline" at all.

Kurt Harriman
This commit is contained in:
Tom Lane
2010-02-13 02:34:16 +00:00
parent b95a720a48
commit e08ab7c312
11 changed files with 137 additions and 46 deletions
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69
configure vendored
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@ -14535,6 +14535,75 @@ _ACEOF
;;
esac
{ $as_echo "$as_me:$LINENO: checking for quiet inline (no complaint if unreferenced)" >&5
$as_echo_n "checking for quiet inline (no complaint if unreferenced)... " >&6; }
if test "${pgac_cv_c_inline_quietly+set}" = set; then
$as_echo_n "(cached) " >&6
else
pgac_cv_c_inline_quietly=no
if test "$ac_cv_c_inline" != no; then
pgac_c_inline_save_werror=$ac_c_werror_flag
ac_c_werror_flag=yes
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
static inline int fun () {return 0;}
int
main ()
{
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (ac_try="$ac_link"
case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
$as_echo "$ac_try_echo") >&5
(eval "$ac_link") 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } && {
test -z "$ac_c_werror_flag" ||
test ! -s conftest.err
} && test -s conftest$ac_exeext && {
test "$cross_compiling" = yes ||
$as_test_x conftest$ac_exeext
}; then
pgac_cv_c_inline_quietly=yes
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -rf conftest.dSYM
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext
ac_c_werror_flag=$pgac_c_inline_save_werror
fi
fi
{ $as_echo "$as_me:$LINENO: result: $pgac_cv_c_inline_quietly" >&5
$as_echo "$pgac_cv_c_inline_quietly" >&6; }
if test "$pgac_cv_c_inline_quietly" != no; then
cat >>confdefs.h <<_ACEOF
#define USE_INLINE 1
_ACEOF
fi
{ $as_echo "$as_me:$LINENO: checking for preprocessor stringizing operator" >&5
$as_echo_n "checking for preprocessor stringizing operator... " >&6; }
if test "${ac_cv_c_stringize+set}" = set; then