From 84a7917b4c9afec07575065cffa143b91fe98c14 Mon Sep 17 00:00:00 2001
From: Stefan Krah <skrah@bytereef.org>
Date: Fri, 4 Sep 2020 22:33:17 +0200
Subject: [PATCH] bpo-41721: Add xlc options (GH-22096)

---
 configure    | 5 ++++-
 configure.ac | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 4c18ae7e364..ad74754e9a7 100755
--- a/configure
+++ b/configure
@@ -7592,11 +7592,14 @@ $as_echo "$MACOSX_DEPLOYMENT_TARGET" >&6; }
     ;;
 esac
 
-# ICC needs -fp-model strict or floats behave badly
 case "$CC" in
 *icc*)
+    # ICC needs -fp-model strict or floats behave badly
     CFLAGS_NODIST="$CFLAGS_NODIST -fp-model strict"
     ;;
+*xlc*)
+    CFLAGS_NODIST="$CFLAGS_NODIST -qalias=noansi -qmaxmem=-1"
+    ;;
 esac
 
 if test "$assertions" = 'true'; then
diff --git a/configure.ac b/configure.ac
index 3b40f39124d..f0bc8c62584 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1993,11 +1993,14 @@ yes)
     ;;
 esac
 
-# ICC needs -fp-model strict or floats behave badly
 case "$CC" in
 *icc*)
+    # ICC needs -fp-model strict or floats behave badly
     CFLAGS_NODIST="$CFLAGS_NODIST -fp-model strict"
     ;;
+*xlc*)
+    CFLAGS_NODIST="$CFLAGS_NODIST -qalias=noansi -qmaxmem=-1"
+    ;;
 esac
 
 if test "$assertions" = 'true'; then