diff options
| -rw-r--r-- | Doc/whatsnew/3.10.rst | 8 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Build/2020-10-21-18-31-54.bpo-38980.xz7BNd.rst | 3 | ||||
| -rwxr-xr-x | configure | 8 | ||||
| -rw-r--r-- | configure.ac | 8 |
4 files changed, 27 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst index e275a7c..e464be6 100644 --- a/Doc/whatsnew/3.10.rst +++ b/Doc/whatsnew/3.10.rst @@ -256,6 +256,14 @@ Optimizations It is about 36% faster now. (Contributed by Pablo Galindo and Yury Selivanov in :issue:`42093`.) +* When building Python with ``--enable-optimizations`` now + ``-fno-semantic-interposition`` is added to both the compile and link line. + This speeds builds of the Python interpreter created with ``--enable-shared`` + with ``gcc`` by up to 30%. See `this article + <https://developers.redhat.com/blog/2020/06/25/red-hat-enterprise-linux-8-2-brings-faster-python-3-8-run-speeds/>`_ + for more details. (Contributed by Victor Stinner and Pablo Galindo in + :issue:`38980`) + Deprecated ========== diff --git a/Misc/NEWS.d/next/Build/2020-10-21-18-31-54.bpo-38980.xz7BNd.rst b/Misc/NEWS.d/next/Build/2020-10-21-18-31-54.bpo-38980.xz7BNd.rst new file mode 100644 index 0000000..c9d34cf --- /dev/null +++ b/Misc/NEWS.d/next/Build/2020-10-21-18-31-54.bpo-38980.xz7BNd.rst @@ -0,0 +1,3 @@ +Add ``-fno-semantic-interposition`` to both the compile and link line when +building with ``--enable-optimizations``. Patch by Victor Stinner and Pablo +Galindo. @@ -6482,6 +6482,14 @@ if test "$Py_OPT" = 'true' ; then DEF_MAKE_ALL_RULE="profile-opt" REQUIRE_PGO="yes" DEF_MAKE_RULE="build_all" + case $CC in + *gcc*) + CFLAGS_NODIST="$CFLAGS_NODIST -fno-semantic-interposition" + LDFLAGS_NODIST="$LDFLAGS_NODIST -fno-semantic-interposition" + ;; + esac + + else DEF_MAKE_ALL_RULE="build_all" REQUIRE_PGO="no" diff --git a/configure.ac b/configure.ac index 6ffe90a..c63c1e8 100644 --- a/configure.ac +++ b/configure.ac @@ -1318,6 +1318,14 @@ if test "$Py_OPT" = 'true' ; then DEF_MAKE_ALL_RULE="profile-opt" REQUIRE_PGO="yes" DEF_MAKE_RULE="build_all" + case $CC in + *gcc*) + CFLAGS_NODIST="$CFLAGS_NODIST -fno-semantic-interposition" + LDFLAGS_NODIST="$LDFLAGS_NODIST -fno-semantic-interposition" + ;; + esac + + else DEF_MAKE_ALL_RULE="build_all" REQUIRE_PGO="no" |