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[Qemu-devel] [PULL 1/6] build: automatically handle GIT submodule checko
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 1/6] build: automatically handle GIT submodule checkout for dtc |
Date: |
Thu, 5 Oct 2017 12:01:01 +0200 |
From: "Daniel P. Berrange" <address@hidden>
Currently if DTC is required by configure and not available in the host
OS install, we exit with an error message telling the user to checkout a
git submodule or install the library.
This introduces automatic handling of the git submodule checkout process
and enables it for dtc. This only runs if building from GIT, so users of
release tarballs still need the system library install. The current state
of the git checkout is stashed in .git-submodule-status, and a helper
program is used to determine if this state matches the desired submodule
state. A dependency against 'Makefile' ensures that the submodule state
is refreshed at the start of the build process
Signed-off-by: Daniel P. Berrange <address@hidden>
Message-id: address@hidden
Signed-off-by: Gerd Hoffmann <address@hidden>
---
configure | 46 ++++++++++++++++++++++++++--------------------
Makefile | 25 ++++++++++++++++++++++++-
.gitignore | 1 +
MAINTAINERS | 6 ++++++
scripts/git-submodule.sh | 38 ++++++++++++++++++++++++++++++++++++++
5 files changed, 95 insertions(+), 21 deletions(-)
create mode 100755 scripts/git-submodule.sh
diff --git a/configure b/configure
index 6587e8014b..38f1710c80 100755
--- a/configure
+++ b/configure
@@ -264,6 +264,7 @@ cc_i386=i386-pc-linux-gnu-gcc
libs_qga=""
debug_info="yes"
stack_protector=""
+git_submodules=""
# Don't accept a target_list environment variable.
unset target_list
@@ -3584,27 +3585,30 @@ EOF
if compile_prog "" "$fdt_libs" ; then
# system DTC is good - use it
fdt=yes
- elif test -d ${source_path}/dtc/libfdt ; then
- # have submodule DTC - use it
- fdt=yes
- dtc_internal="yes"
- mkdir -p dtc
- if [ "$pwd_is_source_path" != "y" ] ; then
- symlink "$source_path/dtc/Makefile" "dtc/Makefile"
- symlink "$source_path/dtc/scripts" "dtc/scripts"
- fi
- fdt_cflags="-I\$(SRC_PATH)/dtc/libfdt"
- fdt_libs="-L\$(BUILD_DIR)/dtc/libfdt $fdt_libs"
- elif test "$fdt" = "yes" ; then
- # have neither and want - prompt for system/submodule install
- error_exit "DTC (libfdt) version >= 1.4.2 not present. Your options:" \
- " (1) Preferred: Install the DTC (libfdt) devel package" \
- " (2) Fetch the DTC submodule, using:" \
- " git submodule update --init dtc"
else
- # don't have and don't want
- fdt_libs=
- fdt=no
+ # have GIT checkout, so activate dtc submodule
+ if test -e "${source_path}/.git" ; then
+ git_submodules="${git_submodules} dtc"
+ fi
+ if test -d "${source_path}/dtc/libfdt" || test -e "${source_path}/.git"
; then
+ fdt=yes
+ dtc_internal="yes"
+ mkdir -p dtc
+ if [ "$pwd_is_source_path" != "y" ] ; then
+ symlink "$source_path/dtc/Makefile" "dtc/Makefile"
+ symlink "$source_path/dtc/scripts" "dtc/scripts"
+ fi
+ fdt_cflags="-I\$(SRC_PATH)/dtc/libfdt"
+ fdt_libs="-L\$(BUILD_DIR)/dtc/libfdt $fdt_libs"
+ elif test "$fdt" = "yes" ; then
+ # Not a git build & no libfdt found, prompt for system install
+ error_exit "DTC (libfdt) version >= 1.4.2 not present." \
+ "Please install the DTC (libfdt) devel package"
+ else
+ # don't have and don't want
+ fdt_libs=
+ fdt=no
+ fi
fi
fi
@@ -5295,6 +5299,7 @@ echo "local state directory queried at runtime"
echo "Windows SDK $win_sdk"
fi
echo "Source path $source_path"
+echo "GIT submodules $git_submodules"
echo "C compiler $cc"
echo "Host C compiler $host_cc"
echo "C++ compiler $cxx"
@@ -5483,6 +5488,7 @@ echo "extra_cxxflags=$EXTRA_CXXFLAGS" >> $config_host_mak
echo "extra_ldflags=$EXTRA_LDFLAGS" >> $config_host_mak
echo "qemu_localedir=$qemu_localedir" >> $config_host_mak
echo "libs_softmmu=$libs_softmmu" >> $config_host_mak
+echo "GIT_SUBMODULES=$git_submodules" >> $config_host_mak
echo "ARCH=$ARCH" >> $config_host_mak
diff --git a/Makefile b/Makefile
index cee6e28659..cec0f44374 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,29 @@ ifneq ($(wildcard config-host.mak),)
all:
include config-host.mak
+git-submodule-update:
+
+.PHONY: git-submodule-update
+
+ifeq (0,$(MAKELEVEL))
+ git_module_status := $(shell \
+ cd '$(SRC_PATH)' && \
+ ./scripts/git-submodule.sh status $(GIT_SUBMODULES); \
+ echo $$?; \
+ )
+
+ifeq (1,$(git_module_status))
+git-submodule-update:
+ $(call quiet-command, \
+ (cd $(SRC_PATH) && ./scripts/git-submodule.sh update
$(GIT_SUBMODULES)), \
+ "GIT","$(GIT_SUBMODULES)")
+endif
+endif
+
+.git-submodule-status: git-submodule-update
+
+Makefile: .git-submodule-status
+
# Check that we're not trying to do an out-of-tree build from
# a tree that's been used for an in-tree build.
ifneq ($(realpath $(SRC_PATH)),$(realpath .))
@@ -330,7 +353,7 @@ DTC_MAKE_ARGS=-I$(SRC_PATH)/dtc VPATH=$(SRC_PATH)/dtc -C
dtc V="$(V)" LIBFDT_src
DTC_CFLAGS=$(CFLAGS) $(QEMU_CFLAGS)
DTC_CPPFLAGS=-I$(BUILD_DIR)/dtc -I$(SRC_PATH)/dtc -I$(SRC_PATH)/dtc/libfdt
-subdir-dtc:dtc/libfdt dtc/tests
+subdir-dtc: .git-submodule-status dtc/libfdt dtc/tests
$(call quiet-command,$(MAKE) $(DTC_MAKE_ARGS)
CPPFLAGS="$(DTC_CPPFLAGS)" CFLAGS="$(DTC_CFLAGS)" LDFLAGS="$(LDFLAGS)"
ARFLAGS="$(ARFLAGS)" CC="$(CC)" AR="$(AR)" LD="$(LD)" $(SUBDIR_MAKEFLAGS)
libfdt/libfdt.a,)
dtc/%:
diff --git a/.gitignore b/.gitignore
index 3a7e01dc6a..b5e115d96b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -113,6 +113,7 @@
/docs/version.texi
*.tps
.stgit-*
+.git-submodule-status
cscope.*
tags
TAGS
diff --git a/MAINTAINERS b/MAINTAINERS
index 932443df41..7708bbb21d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1947,3 +1947,9 @@ M: Daniel P. Berrange <address@hidden>
S: Odd Fixes
F: docs/devel/build-system.txt
+Build System
+------------
+GIT submodules
+M: Daniel P. Berrange <address@hidden>
+S: Odd Fixes
+F: scripts/git-submodule.sh
diff --git a/scripts/git-submodule.sh b/scripts/git-submodule.sh
new file mode 100755
index 0000000000..9f73f0e6e3
--- /dev/null
+++ b/scripts/git-submodule.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+#
+# This code is licensed under the GPL version 2 or later. See
+# the COPYING file in the top-level directory.
+
+set -e
+
+substat=".git-submodule-status"
+
+command=$1
+shift
+modules="$@"
+
+if test -z "$modules"
+then
+ test -e $substat || touch $substat
+ exit 0
+fi
+
+if ! test -e ".git"
+then
+ echo "$0: unexpectedly called with submodules but no git checkout exists"
+ exit 1
+fi
+
+case "$command" in
+status)
+ test -f "$substat" || exit 1
+ trap "rm -f ${substat}.tmp" EXIT
+ git submodule status $modules > "${substat}.tmp"
+ diff "${substat}" "${substat}.tmp" >/dev/null
+ exit $?
+ ;;
+update)
+ git submodule update --init $modules 1>/dev/null 2>&1
+ git submodule status $modules > "${substat}"
+ ;;
+esac
--
2.9.3
- [Qemu-devel] [PULL 0/6] Ui 20171005 patches, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 4/6] ui: convert common input code to keycodemapdb, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 3/6] ui: add keycodemapdb repository as a GIT submodule, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 5/6] ui: convert key events to QKeyCodes immediately, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 2/6] docker: don't rely on submodules existing in the main checkout, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 6/6] ui: don't export qemu_input_event_new_key, Gerd Hoffmann, 2017/10/05
- [Qemu-devel] [PULL 1/6] build: automatically handle GIT submodule checkout for dtc,
Gerd Hoffmann <=
- Re: [Qemu-devel] [PULL 0/6] Ui 20171005 patches, no-reply, 2017/10/05
- Re: [Qemu-devel] [PULL 0/6] Ui 20171005 patches, Peter Maydell, 2017/10/05