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gh-96761: Fix lto-build for clang by matthiasgoergens · Pull Request #96762 · python/cpython · GitHub

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gh-96761: Fix lto-build for clang #96762

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gh-96761: Fix lto-build for clang #96762

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aee5500
Fix lto-build for clang
matthiasgoergens Sep 12, 2022
9bd6dc3
Run with approved autoconf
matthiasgoergens Sep 12, 2022
c6129de
Update comment
matthiasgoergens Sep 12, 2022
2861b12
Update configure.ac
matthiasgoergens Sep 14, 2022
8953bf7
Update configure.ac
matthiasgoergens Sep 17, 2022
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4 changes: 2 additions & 2 deletions configure
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7 changes: 4 additions & 3 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -1774,7 +1774,7 @@ then
fi
AC_MSG_RESULT($PROFILE_TASK)

# Make llvm-relatec checks work on systems where llvm tools are not installed with their
# Make llvm-related checks work on systems where llvm tools are not installed with their
# normal names in the default $PATH (ie: Ubuntu). They exist under the
# non-suffixed name in their versioned llvm directory.

Expand Down Expand Up @@ -1828,8 +1828,9 @@ esac
if test "$Py_LTO" = 'true' ; then
case $CC in
*clang*)
dnl flag to disable lto during linking
LDFLAGS_NOLTO="-fno-lto"
dnl Clang linker requires -flto in order to link objects with LTO information.
dnl Thin LTO is faster and works for object files with full LTO information, too.
AX_CHECK_COMPILE_FLAG([-flto=thin],[LDFLAGS_NOLTO="-flto=thin"],[LDFLAGS_NOLTO="-flto"])
AC_SUBST(LLVM_AR)
AC_PATH_TOOL(LLVM_AR, llvm-ar, '', ${llvm_path})
AC_SUBST(LLVM_AR_FOUND)
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