[Qemu-devel] [PATCH] qapi: check for python, allow path to be specified

[Michael Roth <mdroth@linux.vnet.ibm.com>]

QAPI requires python to generate code. Check for python during
configuration and allow python to be specified manually.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 Makefile  |   12 ++++++------
 configure |   13 +++++++++++++
 2 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index f3a03ad..daa3aa0 100644
--- a/Makefile
+++ b/Makefile
@@ -168,22 +168,22 @@ test-visitor.o test-qmp-commands.o qemu-ga$(EXESUF): QEMU_CFLAGS += -I $(qapi-di
 
 $(qapi-dir)/test-qapi-types.c: $(qapi-dir)/test-qapi-types.h
 $(qapi-dir)/test-qapi-types.h: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-types.py
-	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-types.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
 $(qapi-dir)/test-qapi-visit.c: $(qapi-dir)/test-qapi-visit.h
 $(qapi-dir)/test-qapi-visit.h: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-visit.py
-	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-visit.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
 $(qapi-dir)/test-qmp-commands.h: $(qapi-dir)/test-qmp-marshal.c
 $(qapi-dir)/test-qmp-marshal.c: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-commands.py
-	    $(call quiet-command,python $(SRC_PATH)/scripts/qapi-commands.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
+	    $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py -o "$(qapi-dir)" -p "test-" < $<, "  GEN   $@")
 
 $(qapi-dir)/qga-qapi-types.c: $(qapi-dir)/qga-qapi-types.h
 $(qapi-dir)/qga-qapi-types.h: $(SRC_PATH)/qapi-schema-guest.json $(SRC_PATH)/scripts/qapi-types.py
-	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-types.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
 $(qapi-dir)/qga-qapi-visit.c: $(qapi-dir)/qga-qapi-visit.h
 $(qapi-dir)/qga-qapi-visit.h: $(SRC_PATH)/qapi-schema-guest.json $(SRC_PATH)/scripts/qapi-visit.py
-	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-visit.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
 $(qapi-dir)/qga-qmp-marshal.c: $(SRC_PATH)/qapi-schema-guest.json $(SRC_PATH)/scripts/qapi-commands.py
-	$(call quiet-command,python $(SRC_PATH)/scripts/qapi-commands.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
+	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py -o "$(qapi-dir)" -p "qga-" < $<, "  GEN   $@")
 
 test-visitor.o: $(addprefix $(qapi-dir)/, test-qapi-types.c test-qapi-types.h test-qapi-visit.c test-qapi-visit.h) $(qapi-obj-y)
 test-visitor: test-visitor.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o $(qapi-obj-y) error.o osdep.o qemu-malloc.o $(oslib-obj-y) qjson.o json-streamer.o json-lexer.o json-parser.o qerror.o qemu-error.o qemu-tool.o $(qapi-dir)/test-qapi-visit.o $(qapi-dir)/test-qapi-types.o
diff --git a/configure b/configure
index 6911c3b..c0cb979 100755
--- a/configure
+++ b/configure
@@ -225,6 +225,7 @@ strip="${cross_prefix}${STRIP-strip}"
 windres="${cross_prefix}${WINDRES-windres}"
 pkg_config="${cross_prefix}${PKG_CONFIG-pkg-config}"
 sdl_config="${cross_prefix}${SDL_CONFIG-sdl-config}"
+python_path="${cross_prefix}${PYTHON_PATH-python}"
 
 # default flags for all hosts
 QEMU_CFLAGS="-fno-strict-aliasing $QEMU_CFLAGS"
@@ -748,6 +749,8 @@ for opt do
   ;;
   --enable-usb-redir) usb_redir="yes"
   ;;
+  --python-path=*) python_path="$optarg"
+  ;;
   *) echo "ERROR: unknown option $opt"; show_help="yes"
   ;;
   esac
@@ -1025,6 +1028,7 @@ echo "  --disable-smartcard-nss  disable smartcard nss support"
 echo "  --enable-smartcard-nss   enable smartcard nss support"
 echo "  --disable-usb-redir      disable usb network redirection support"
 echo "  --enable-usb-redir       enable usb network redirection support"
+echo "  --python-path=PATH       path to python executable"
 echo ""
 echo "NOTE: The object files are built at the place where configure is launched"
 exit 1
@@ -1810,6 +1814,13 @@ EOF
 fi
 
 ##########################################
+# python probe
+if ! $python_path -V >/dev/null 2>&1; then
+    echo "python executable not found: $python_path. You can specify with --python-path"
+    exit 1
+fi
+
+##########################################
 # glib support probe
 if $pkg_config --modversion gthread-2.0 gio-2.0 > /dev/null 2>&1 ; then
     glib_cflags=`$pkg_config --cflags gthread-2.0 gio-2.0 2>/dev/null`
@@ -2655,6 +2666,7 @@ echo "xfsctl support    $xfs"
 echo "nss used          $smartcard_nss"
 echo "usb net redir     $usb_redir"
 echo "OpenGL support    $opengl"
+echo "python path       $python_path"
 
 if test $sdl_too_old = "yes"; then
 echo "-> Your SDL version is too old - please upgrade to have SDL support"
@@ -3026,6 +3038,7 @@ echo "ARLIBS_END=$arlibs_end" >> $config_host_mak
 echo "LIBS+=$LIBS" >> $config_host_mak
 echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
 echo "EXESUF=$EXESUF" >> $config_host_mak
+echo "PYTHON=$python_path" >> $config_host_mak
 
 # generate list of library paths for linker script
 
-- 
1.7.0.4