kumquat-buildroot/package/upmpdcli/upmpdcli.mk
Arnout Vandecappelle 7d69a79624 packages: use backtick instead of $(shell ...) make function
It is often difficult to know exactly when make will expand the
variable, and usually it can only be expanded after the dependencies
have been built (e.g. pkg-config or the .pc file). Using a backtick
instead makes it very clear that it will be expanded only while
executing the command.

This change is useful for two cases:

1. The per-package staging (and host) directory will be created as part
   of the configure step, so any $(shell ...) variable that is used in
   the configure step will fail because the directory doesn't exist
   yet.

2. 'make printvars' evaluates the variables it prints. It will therefore
   trigger a lot of errors from missing .pc files and others. The
   backticks, on the other hand, are not expanded, so with this change
   the output of 'make printvars' becomes clean again.

This commit contains only the easy changes: replace $(shell ...) with
`...`, and also replace ' with " where needed. Follow-up commits will
tackle the more complicated cases that need additional explanation.

After this change, the following instances of $(shell ...) will remain:

- All assignments that use :=
- All variables that are used in make conditionals (which don't expand
  the backticks).
- All variables that only refer to system executables and make
  variables that don't change.
- The calls to check-host-* in dependencies.mk, because it is eval'ed.

[Original patch by Fabio Porcedda, but extended quite a bit by Arnout.]

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-07-15 00:42:01 +02:00

49 lines
1.7 KiB
Makefile

################################################################################
#
# upmpdcli
#
################################################################################
UPMPDCLI_VERSION = 0.11.0
UPMPDCLI_SITE = http://www.lesbonscomptes.com/upmpdcli/downloads
UPMPDCLI_LICENSE = GPLv2+
UPMPDCLI_LICENSE_FILES = COPYING
UPMPDCLI_DEPENDENCIES = libmpdclient libupnpp
ifeq ($(BR2_STATIC_LIBS),y)
# Upmpdcli forgets to take the dependencies of libupnpp into
# consideration, breaking static linking, so help it.
# Libupnpp unfortunately doesn't provide a .pc file, so manually
# handle the dependencies here.
# The build system doesn't expand LIBS from the configure step, so
# manually pass it to make.
UPMPDCLI_DEPENDENCIES += host-pkgconf
UPMPDCLI_MAKE_OPTS = \
LIBS="`$(PKG_CONFIG_HOST_BINARY) --libs expat libcurl libupnp`"
endif
# Upmpdcli only runs if user upmpdcli exists
define UPMPDCLI_USERS
upmpdcli -1 upmpdcli -1 * - - - Upmpdcli MPD UPnP Renderer Front-End
endef
define UPMPDCLI_INSTALL_INIT_SYSV
$(INSTALL) -D -m 0755 package/upmpdcli/S99upmpdcli $(TARGET_DIR)/etc/init.d/S99upmpdcli
endef
define UPMPDCLI_INSTALL_INIT_SYSTEMD
$(INSTALL) -D -m 644 $(@D)/systemd/upmpdcli.service \
$(TARGET_DIR)/usr/lib/systemd/system/upmpdcli.service
mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
ln -sf ../../../../usr/lib/systemd/system/upmpdcli.service \
$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/upmpdcli.service
endef
define UPMPDCLI_INSTALL_CONF_FILE
$(INSTALL) -D -m 0755 $(@D)/src/upmpdcli.conf $(TARGET_DIR)/etc/upmpdcli.conf
endef
UPMPDCLI_POST_INSTALL_TARGET_HOOKS += UPMPDCLI_INSTALL_CONF_FILE
$(eval $(autotools-package))