[Xen-changelog] [xen staging] configure: Fix test for python 3.8

[patchbot@xxxxxxx]

commit 0d2791b007436f83cc8cb922acb1849a3ff31f3a
Author:     Anthony PERARD <anthony.perard@xxxxxxxxxx>
AuthorDate: Fri Nov 15 16:15:32 2019 +0000
Commit:     Wei Liu <wl@xxxxxxx>
CommitDate: Wed Nov 20 10:46:48 2019 +0000

    configure: Fix test for python 3.8
    
    
https://docs.python.org/3.8/whatsnew/3.8.html#debug-build-uses-the-same-abi-as-release-build
    
    > To embed Python into an application, a new --embed option must be
    > passed to python3-config --libs --embed to get -lpython3.8 (link the
    > application to libpython). To support both 3.8 and older, try
    > python3-config --libs --embed first and fallback to python3-config
    > --libs (without --embed) if the previous command fails.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Wei Liu <wl@xxxxxxx>
    [ wei: rerun autogen.sh ]
---
 m4/python_devel.m4 | 11 +++++++++--
 tools/configure    |  9 +++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/m4/python_devel.m4 b/m4/python_devel.m4
index e365cd658e..bbf1e0354b 100644
--- a/m4/python_devel.m4
+++ b/m4/python_devel.m4
@@ -23,8 +23,15 @@ AS_IF([test x"$pyconfig" = x"no"], [
 ], [
     dnl If python-config is found use it
     CPPFLAGS="$CFLAGS `$PYTHON-config --cflags`"
-    LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags`"
-    LIBS="$LIBS `$PYTHON-config --libs`"
+    dnl We need to use --embed with python 3.8 but not with earlier version so
+    dnl check if it is recognized.
+    python_devel_embed=""
+    if $PYTHON-config --embed >/dev/null 2>/dev/null; then
+      python_devel_embed="--embed"
+    fi
+    LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags $python_devel_embed`"
+    LIBS="$LIBS `$PYTHON-config --libs $python_devel_embed`"
+    unset python_devel_embed
 ])
 
 AC_CHECK_HEADER([Python.h], [],
diff --git a/tools/configure b/tools/configure
index d9ccce6d2b..e47bcef351 100755
--- a/tools/configure
+++ b/tools/configure
@@ -7460,8 +7460,13 @@ if test x"$pyconfig" = x"no"; then :
 else
 
         CPPFLAGS="$CFLAGS `$PYTHON-config --cflags`"
-    LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags`"
-    LIBS="$LIBS `$PYTHON-config --libs`"
+            python_devel_embed=""
+    if $PYTHON-config --embed >/dev/null 2>/dev/null; then
+      python_devel_embed="--embed"
+    fi
+    LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags $python_devel_embed`"
+    LIBS="$LIBS `$PYTHON-config --libs $python_devel_embed`"
+    unset python_devel_embed
 
 fi
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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