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bpo-43109: Fix --with-lto configure option on macOS (GH-26341)

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Allow --with-lto configure option to work with Apple-supplied Xcode or
Command Line Tools which do not provide llvm-ar.
This commit is contained in:
Ned Deily 2021-05-24 23:00:04 -04:00 • committed by GitHub
parent 2f3a87856c
commit 59acfd4a09
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3 changed files with 14 additions and 6 deletions
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9
configure vendored
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@ -6711,10 +6711,11 @@ fi
fi
if test "$ac_sys_system" = "Darwin" -a "${LLVM_AR_FOUND}" = "not-found"
then
found_llvm_ar=`/usr/bin/xcrun -find llvm-ar 2>/dev/null`
# The Apple-supplied ar in Xcode or the Command Line Tools is apparently sufficient
found_llvm_ar=`/usr/bin/xcrun -find ar 2>/dev/null`
if test -n "${found_llvm_ar}"
then
LLVM_AR='/usr/bin/xcrun llvm-ar'
LLVM_AR='/usr/bin/xcrun ar'
LLVM_AR_FOUND=found
{ $as_echo "$as_me:${as_lineno-$LINENO}: llvm-ar found via xcrun: ${LLVM_AR}" >&5
$as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
@ -6732,6 +6733,7 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
Darwin*)
# Any changes made here should be reflected in the GCC+Darwin case below
LTOFLAGS="-flto -Wl,-export_dynamic"
LTOCFLAGS="-flto"
;;
*)
LTOFLAGS="-flto"
@ -6742,6 +6744,7 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
case $ac_sys_system in
Darwin*)
LTOFLAGS="-flto -Wl,-export_dynamic"
LTOCFLAGS="-flto"
;;
*)
LTOFLAGS="-flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none"
@ -6757,7 +6760,7 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
LTOFLAGS="$LTOFLAGS -g"
fi
CFLAGS_NODIST="$CFLAGS_NODIST $LTOFLAGS"
CFLAGS_NODIST="$CFLAGS_NODIST ${LTOCFLAGS-$LTOFLAGS}"
LDFLAGS_NODIST="$LDFLAGS_NODIST $LTOFLAGS"
fi