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bpo-44340: Add support for building with clang full/thin lto by corona10 · Pull Request #27231 · python/cpython · GitHub
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bpo-44340: Add support for building with clang full/thin lto #27231

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Merged
corona10 merged 5 commits into from
Jul 19, 2021
Merged

bpo-44340: Add support for building with clang full/thin lto #27231

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e5fd3b8
bpo-44340: Add support for building with clang full/thin lto
corona10 Jul 18, 2021
ce0757f
bpo-44340: Use @tiran solution
corona10 Jul 18, 2021
5668510
bpo-44340: Update
corona10 Jul 18, 2021
814b241
bpo-44340: Fix
corona10 Jul 18, 2021
1d3f6fa
bpo-44340: Update Doc
corona10 Jul 18, 2021
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bpo-44340: Update
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@corona10
corona10 committed Jul 18, 2021
commit 566851071d33bce18034cd6666f35a2206d247ee
19 changes: 15 additions & 4 deletions configure
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Original file line number Diff line number Diff line change
Expand Up @@ -6601,7 +6601,7 @@ $as_echo "yes" >&6; }
;;
yes)
Py_LTO='true'
Py_LTO_POLICY='full'
Py_LTO_POLICY='default'
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
;;
Expand Down Expand Up @@ -6753,11 +6753,22 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
case $ac_sys_system in
Darwin*)
# Any changes made here should be reflected in the GCC+Darwin case below
LTOFLAGS="-flto=${Py_LTO_POLICY} -Wl,-export_dynamic"
LTOCFLAGS="-flto=${Py_LTO_POLICY}"
if test $Py_LTO_POLICY = 'default'
then
LTOFLAGS="-flto -Wl,-export_dynamic"
LTOCFLAGS="-flto"
else
LTOFLAGS="-flto=${Py_LTO_POLICY} -Wl,-export_dynamic"
LTOCFLAGS="-flto=${Py_LTO_POLICY}"
fi
;;
*)
LTOFLAGS="-flto={Py_LTO_POLICY}"
if test $Py_LTO_POLICY = 'default'
then
LTOFLAGS="-flto"
else
LTOFLAGS="-flto={Py_LTO_POLICY}"
fi
;;
esac
;;
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19 changes: 15 additions & 4 deletions configure.ac
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Expand Up @@ -1375,7 +1375,7 @@ case "$withval" in
;;
yes)
Py_LTO='true'
Py_LTO_POLICY='full'
Py_LTO_POLICY='default'

@corona10 corona10 Jul 18, 2021

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If the Py_LTO_POLICY is the default, it will follow the default LTO option of compiler

AC_MSG_RESULT(yes)
;;
no)
Expand Down Expand Up @@ -1423,11 +1423,22 @@ if test "$Py_LTO" = 'true' ; then
case $ac_sys_system in
Darwin*)
# Any changes made here should be reflected in the GCC+Darwin case below
LTOFLAGS="-flto=${Py_LTO_POLICY} -Wl,-export_dynamic"
LTOCFLAGS="-flto=${Py_LTO_POLICY}"
if test $Py_LTO_POLICY = 'default'
then
LTOFLAGS="-flto -Wl,-export_dynamic"
LTOCFLAGS="-flto"
else
LTOFLAGS="-flto=${Py_LTO_POLICY} -Wl,-export_dynamic"
LTOCFLAGS="-flto=${Py_LTO_POLICY}"
fi
;;
*)
LTOFLAGS="-flto={Py_LTO_POLICY}"
if test $Py_LTO_POLICY = 'default'
then
LTOFLAGS="-flto"
else
LTOFLAGS="-flto={Py_LTO_POLICY}"
fi
;;
esac
;;
Expand Down