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authorDong-hee Na <donghee.na@python.org>2022-09-16 10:40:05 (GMT)
committerGitHub <noreply@github.com>2022-09-16 10:40:05 (GMT)
commite47b96c44f7b48a1e95de24f38f6e3de879b4d61 (patch)
tree56cd8f495c33eccdf04681132d1d84009dd5434c /configure
parent16c33a9676e2f3ef330d09f2ab515c56636fa09f (diff)
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gh-89536: Use ThinLTO policy if possible (gh-96766)
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure82
1 files changed, 79 insertions, 3 deletions
diff --git a/configure b/configure
index b2024ba..08ec216 100755
--- a/configure
+++ b/configure
@@ -7837,8 +7837,49 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
# Any changes made here should be reflected in the GCC+Darwin case below
if test $Py_LTO_POLICY = default
then
- LTOFLAGS="-flto -Wl,-export_dynamic -Wl,-object_path_lto,\"\$@\".lto"
- LTOCFLAGS="-flto"
+ # Check that ThinLTO is accepted.
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -flto=thin" >&5
+$as_echo_n "checking whether C compiler accepts -flto=thin... " >&6; }
+if ${ax_cv_check_cflags___flto_thin+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ ax_check_save_flags=$CFLAGS
+ CFLAGS="$CFLAGS -flto=thin"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ax_cv_check_cflags___flto_thin=yes
+else
+ ax_cv_check_cflags___flto_thin=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS=$ax_check_save_flags
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___flto_thin" >&5
+$as_echo "$ax_cv_check_cflags___flto_thin" >&6; }
+if test "x$ax_cv_check_cflags___flto_thin" = xyes; then :
+
+ LTOFLAGS="-flto=thin -Wl,-export_dynamic -Wl,-object_path_lto,\"\$@\".lto"
+ LTOCFLAGS="-flto=thin"
+
+else
+
+ LTOFLAGS="-flto -Wl,-export_dynamic -Wl,-object_path_lto,\"\$@\".lto"
+ LTOCFLAGS="-flto"
+
+
+fi
+
else
LTOFLAGS="-flto=${Py_LTO_POLICY} -Wl,-export_dynamic -Wl,-object_path_lto,\"\$@\".lto"
LTOCFLAGS="-flto=${Py_LTO_POLICY}"
@@ -7847,7 +7888,42 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
*)
if test $Py_LTO_POLICY = default
then
- LTOFLAGS="-flto"
+ # Check that ThinLTO is accepted
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -flto=thin" >&5
+$as_echo_n "checking whether C compiler accepts -flto=thin... " >&6; }
+if ${ax_cv_check_cflags___flto_thin+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ ax_check_save_flags=$CFLAGS
+ CFLAGS="$CFLAGS -flto=thin"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ ax_cv_check_cflags___flto_thin=yes
+else
+ ax_cv_check_cflags___flto_thin=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS=$ax_check_save_flags
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags___flto_thin" >&5
+$as_echo "$ax_cv_check_cflags___flto_thin" >&6; }
+if test "x$ax_cv_check_cflags___flto_thin" = xyes; then :
+ LTOFLAGS="-flto=thin"
+else
+ LTOFLAGS="-flto"
+fi
+
else
LTOFLAGS="-flto=${Py_LTO_POLICY}"
fi