Issue #26359: Add the --with-optimizations flag.
diff --git a/configure b/configure
index 1cc045b..12a439d 100755
--- a/configure
+++ b/configure
@@ -668,6 +668,8 @@
PGO_PROF_USE_FLAG
PGO_PROF_GEN_FLAG
LTOFLAGS
+DEF_MAKE_RULE
+DEF_MAKE_ALL_RULE
UNIVERSAL_ARCH_FLAGS
BASECFLAGS
OPT
@@ -798,6 +800,7 @@
enable_shared
enable_profiling
with_pydebug
+with_optimizations
with_lto
enable_toolbox_glue
with_libs
@@ -1491,6 +1494,8 @@
compiler
--with-suffix=.exe set executable suffix
--with-pydebug build with Py_DEBUG defined
+ --with-optimizations Enable all optimizations when available (LTO, PGO,
+ etc). Disabled by default.
--with-lto Enable Link Time Optimization in PGO builds.
Disabled by default.
--with-libs='lib1 ...' link against additional libs
@@ -6386,6 +6391,47 @@
fi
+# Enable optimization flags
+
+
+Py_OPT='false'
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-optimizations" >&5
+$as_echo_n "checking for --with-optimizations... " >&6; }
+
+# Check whether --with-optimizations was given.
+if test "${with_optimizations+set}" = set; then :
+ withval=$with_optimizations;
+if test "$withval" != no
+then
+ Py_OPT='true'
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; };
+else
+ Py_OPT='false'
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; };
+fi
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+if test "$Py_OPT" = 'true' ; then
+ case $ac_sys_system in
+ Darwin*)
+ # At least on macOS El Capitan, LTO does not work with PGO.
+ Py_LTO='false'
+ ;;
+ esac
+ Py_LTO='true'
+ DEF_MAKE_ALL_RULE="profile-opt"
+ DEF_MAKE_RULE="build_all"
+else
+ DEF_MAKE_ALL_RULE="build_all"
+ DEF_MAKE_RULE="all"
+fi
+
+
# Enable LTO flags
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-lto" >&5
@@ -16320,3 +16366,12 @@
esac
mv config.c Modules
+
+if test "$Py_OPT" = 'false' -a "$Py_DEBUG" != 'true'; then
+ echo "" >&6
+ echo "" >&6
+ echo "If you want a release build with all optimizations active (LTO, PGO, etc),"
+ echo "please run ./configure --with-optimizations" >&6
+ echo "" >&6
+ echo "" >&6
+fi