From 1751423686d05e3facdd6da2620202728e5d7917 Mon Sep 17 00:00:00 2001 From: "Miss Islington (bot)" <31488909+miss-islington@users.noreply.github.com> Date: Tue, 4 Dec 2018 07:06:16 -0800 Subject: [PATCH] bpo-35351: Pass link time optimization flags to CFLAGS_NODIST (GH-10797) When using link time optimizations, the -flto flag is passed to BASECFLAGS, which makes it propagate to distutils. Those flags should be reserved for the interpreter and the stdlib extension modules only, thus moving those flags to CFLAGS_NODIST. (cherry picked from commit f92c7aa1ae81efa475b5aecf66e4711ef0f52c4c) Co-authored-by: stratakis --- Misc/NEWS.d/next/Build/2018-12-04-15-33-28.bpo-35351.ZhhBfT.rst | 2 ++ configure | 2 +- configure.ac | 2 +- 3 files changed, 4 insertions(+), 2 deletions(-) create mode 100644 Misc/NEWS.d/next/Build/2018-12-04-15-33-28.bpo-35351.ZhhBfT.rst diff --git a/Misc/NEWS.d/next/Build/2018-12-04-15-33-28.bpo-35351.ZhhBfT.rst b/Misc/NEWS.d/next/Build/2018-12-04-15-33-28.bpo-35351.ZhhBfT.rst new file mode 100644 index 000000000000..ee6c870b060f --- /dev/null +++ b/Misc/NEWS.d/next/Build/2018-12-04-15-33-28.bpo-35351.ZhhBfT.rst @@ -0,0 +1,2 @@ +When building Python with clang and LTO, LTO flags are no longer passed into +CFLAGS to build third-party C extensions through distutils. diff --git a/configure b/configure index bccedd18b7f8..4714ae887a67 100755 --- a/configure +++ b/configure @@ -6670,7 +6670,7 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;} LTOFLAGS="$LTOFLAGS -g" fi - BASECFLAGS="$BASECFLAGS $LTOFLAGS" + CFLAGS_NODIST="$CFLAGS_NODIST $LTOFLAGS" LDFLAGS="$LDFLAGS $LTOFLAGS" fi diff --git a/configure.ac b/configure.ac index 320671edada8..c35aea98e5b2 100644 --- a/configure.ac +++ b/configure.ac @@ -1394,7 +1394,7 @@ if test "$Py_LTO" = 'true' ; then LTOFLAGS="$LTOFLAGS -g" fi - BASECFLAGS="$BASECFLAGS $LTOFLAGS" + CFLAGS_NODIST="$CFLAGS_NODIST $LTOFLAGS" LDFLAGS="$LDFLAGS $LTOFLAGS" fi -- 2.47.3