[Bug 276170] LLVM bug prevents from enabling PGO optimization for Python 3.11+

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276170

--- Comment #32 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
That was enough context for me to replicate getting a failure
via a 14.1-RELEASE-p6 poudriere jail based build based on,
for example, just adding a CC+clang to CONFIGURE_ENV :

diff --git a/lang/python310/Makefile b/lang/python310/Makefile
index b352e8a2f9d7..ece416cb52dc 100644
--- a/lang/python310/Makefile
+++ b/lang/python310/Makefile
@@ -27,8 +27,9 @@ SHEBANG_FILES+=       Lib/test/ziptestdata/exe_with_z64 \

 DISABLED_EXTENSIONS=   _sqlite3 _tkinter _gdbm
 CONFIGURE_ARGS+=       --enable-shared --without-ensurepip \
-                       --with-system-ffi
-CONFIGURE_ENV+=                OPT="" # Null out OPT to respect user CFLAGS
and remove optimizations
+                       --with-system-ffi --enable-optimizations
+CONFIGURE_ENV+=                CC=clang
+#CONFIGURE_ENV+=               OPT="" # Null out OPT to respect user CFLAGS
and remove optimizations

 INSTALL_TARGET=                altinstall                                     
        # Don't want cloberring of unprefixed files

@@ -45,7 +46,7 @@ PLIST_SUB=            ABI=${ABIFLAGS} \
                        OSMAJOR=${OSVERSION:C/([0-9]*)[0-9]{5}/\1/}            
# For plat-freebsd* in pkg-plist. https://bugs.python.org/issue19554

 OPTIONS_DEFINE=                DEBUG IPV6 LIBMPDEC LTO NLS PYMALLOC
-OPTIONS_DEFAULT=       LIBMPDEC PYMALLOC
+OPTIONS_DEFAULT=       LIBMPDEC PYMALLOC LTO
 OPTIONS_EXCLUDE_riscv64=       LTO
 OPTIONS_RADIO=         HASH
 OPTIONS_RADIO_HASH=    FNV SIPHASH



It got:

[00:00:05] [01] [00:00:00] Building   lang/python310 | python310-3.10.16
[00:04:35] [01] [00:04:30] Saving lang/python310 | python310-3.10.16 wrkdir
[00:05:06] [01] [00:05:01] Saved lang/python310 | python310-3.10.16 wrkdir to:
/usr/local/poudriere/data/wrkdirs/R141p6-aarch64-default/default/python310-3.10.16.tbz
[00:05:06] [01] [00:05:01] Finished   lang/python310 | python310-3.10.16:
Failed: build

I'll check the other test jails as well.

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