[ptxdist] [PATCH v2 1/3] lvm2: make libaio dependency conditional

["Sven Püschel" <s.pueschel@pengutronix.de>]

When only using the device-mapper related part of lvm2, libaio is not
required. This requires us to only use the [install_]device-mapper
make targets to avoid trying to compile the lvm2 tools, which depend on
libaio.

Also move the lvm2 configuration file to the LVM_TOOLS option, as it
won't be built by the device-mapper target and doesn't seem to be
relevant for dmsetup alone.

Signed-off-by: Sven Püschel <s.pueschel@pengutronix.de>

---
v2
- use an conditional if on LIBAIO and also indent the systemd if
---
 rules/lvm2.in   | 4 ++--
 rules/lvm2.make | 7 ++++++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/rules/lvm2.in b/rules/lvm2.in
index f0b8123fc..db009f8d5 100644
--- a/rules/lvm2.in
+++ b/rules/lvm2.in
@@ -4,10 +4,10 @@ menuconfig LVM2
 	tristate
 	select LIBC_DL
 	select GCCLIBS_GCC_S
-	select LIBAIO
+	select LIBAIO			if LVM2_LVM_TOOLS
 	select READLINE
 	select NCURSES
-	select SYSTEMD if LVM2_SYSTEMD
+	select SYSTEMD			if LVM2_SYSTEMD
 	prompt "lvm2                          "
 	help
 	  LVM2 refers to a new userspace toolset that provide logical volume management
diff --git a/rules/lvm2.make b/rules/lvm2.make
index 6e781c66f..d45c89356 100644
--- a/rules/lvm2.make
+++ b/rules/lvm2.make
@@ -90,6 +90,11 @@ LVM2_CONF_OPT := \
 	--with-device-gid=$(PTXCONF_LVM2_DEVICE_GID) \
 	--with-device-mode=$(PTXCONF_LVM2_DEVICE_MODE)
 
+ifndef PTXCONF_LVM2_LVM_TOOLS
+LVM2_MAKE_OPT := device-mapper
+LVM2_INSTALL_OPT := install_device-mapper
+endif
+
 # ----------------------------------------------------------------------------
 # Target-Install
 # ----------------------------------------------------------------------------
@@ -153,9 +158,9 @@ ifdef PTXCONF_LVM2_LVM_TOOLS
 	@$(call install_link, lvm2, lvm, /usr/sbin/vgs)
 	@$(call install_link, lvm2, lvm, /usr/sbin/vgscan)
 	@$(call install_link, lvm2, lvm, /usr/sbin/vgsplit)
-endif
 
 	@$(call install_alternative, lvm2, 0, 0, 0644, /etc/lvm/lvm.conf)
+endif
 
 	@$(call install_lib, lvm2, 0, 0, 0644, libdevmapper)
 	@$(call install_lib, lvm2, 0, 0, 0644, libdevmapper-event)
-- 
2.47.3