[Xen-devel] [PATCH 3/3] build/m4: fix python library detection on Ubuntu systems

[Wei Liu <wei.liu2@xxxxxxxxxx>]

16cc3362aed doesn't work on Ubuntu with gcc (but it does work with
clang). Work around it by manipulating LIBS.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 m4/python_devel.m4 | 7 +++++++
 tools/configure    | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/m4/python_devel.m4 b/m4/python_devel.m4
index f9cb23aee1..7f26381376 100644
--- a/m4/python_devel.m4
+++ b/m4/python_devel.m4
@@ -1,6 +1,7 @@
 AC_DEFUN([AX_CHECK_PYTHON_DEVEL], [
 ac_previous_cppflags=$CPPFLAGS
 ac_previous_ldflags=$LDFLAGS
+ac_previous_libs=$LIBS
 AC_PATH_PROG([pyconfig], [$PYTHON-config], [no])
 AS_IF([test x"$pyconfig" = x"no"], [
     dnl For those that don't have python-config
@@ -15,10 +16,15 @@ AS_IF([test x"$pyconfig" = x"no"], [
         print(distutils.sysconfig.get_config_var("LINKFORSHARED"))'`"
     LDFLAGS="$LDFLAGS `$PYTHON -c 'import distutils.sysconfig; \
         print(distutils.sysconfig.get_config_var("LDFLAGS"))'`"
+    LIBS="$LIBS `$PYTHON -c 'import distutils.sysconfig; \
+        print(distutils.sysconfig.get_config_var("LIBS"))'`"
+    LIBS="$LIBS `$PYTHON -c 'import distutils.sysconfig; \
+        print(distutils.sysconfig.get_config_var("SYSLIBS"))'`"
 ], [
     dnl If python-config is found use it
     CPPFLAGS="$CFLAGS `$PYTHON-config --cflags`"
     LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags`"
+    LIBS="$LIBS `$PYTHON-config --libs`"
 ])
 
 AC_CHECK_HEADER([Python.h], [],
@@ -28,4 +34,5 @@ AC_CHECK_FUNC([PyArg_ParseTuple], [],
 
 CPPFLAGS=$ac_previous_cppflags
 LDFLAGS=$ac_previous_ldflags
+LIBS=$ac_previous_libs
 ])
diff --git a/tools/configure b/tools/configure
index 9ff879548a..b66d3f6fba 100755
--- a/tools/configure
+++ b/tools/configure
@@ -7418,6 +7418,7 @@ if test "$cross_compiling" != yes; then :
 
 ac_previous_cppflags=$CPPFLAGS
 ac_previous_ldflags=$LDFLAGS
+ac_previous_libs=$LIBS
 # Extract the first word of "$PYTHON-config", so it can be a program name with 
args.
 set dummy $PYTHON-config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -7472,11 +7473,16 @@ if test x"$pyconfig" = x"no"; then :
         print(distutils.sysconfig.get_config_var("LINKFORSHARED"))'`"
     LDFLAGS="$LDFLAGS `$PYTHON -c 'import distutils.sysconfig; \
         print(distutils.sysconfig.get_config_var("LDFLAGS"))'`"
+    LIBS="$LIBS `$PYTHON -c 'import distutils.sysconfig; \
+        print(distutils.sysconfig.get_config_var("LIBS"))'`"
+    LIBS="$LIBS `$PYTHON -c 'import distutils.sysconfig; \
+        print(distutils.sysconfig.get_config_var("SYSLIBS"))'`"
 
 else
 
         CPPFLAGS="$CFLAGS `$PYTHON-config --cflags`"
     LDFLAGS="$LDFLAGS `$PYTHON-config --ldflags`"
+    LIBS="$LIBS `$PYTHON-config --libs`"
 
 fi
 
@@ -7498,6 +7504,7 @@ fi
 
 CPPFLAGS=$ac_previous_cppflags
 LDFLAGS=$ac_previous_ldflags
+LIBS=$ac_previous_libs
 
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether Python setup.py 
brokenly enables -D_FORTIFY_SOURCE" >&5
-- 
2.11.0


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