kumquat-buildroot/package/poppler/poppler.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

83 lines
2.0 KiB
Makefile

################################################################################
#
# poppler
#
################################################################################
POPPLER_VERSION = 0.32.0
POPPLER_SOURCE = poppler-$(POPPLER_VERSION).tar.xz
POPPLER_SITE = http://poppler.freedesktop.org
POPPLER_DEPENDENCIES = fontconfig host-pkgconf
POPPLER_LICENSE = GPLv2+
POPPLER_LICENSE_FILES = COPYING
POPPLER_INSTALL_STAGING = YES
POPPLER_CONF_OPTS = --with-font-configuration=fontconfig
ifeq ($(BR2_PACKAGE_LCMS2),y)
POPPLER_CONF_OPTS += --enable-cms=lcms2
POPPLER_DEPENDENCIES += lcms2
else
POPPLER_CONF_OPTS += --enable-cms=none
endif
ifeq ($(BR2_PACKAGE_TIFF),y)
POPPLER_CONF_OPTS += --enable-libtiff
# Help poppler to find libtiff in static linking scenarios
POPPLER_CONF_ENV += \
LIBTIFF_LIBS="`$(PKG_CONFIG_HOST_BINARY) --libs libtiff-4`"
POPPLER_DEPENDENCIES += tiff
else
POPPLER_CONF_OPTS += --disable-libtiff
endif
ifeq ($(BR2_PACKAGE_JPEG),y)
POPPLER_CONF_OPTS += --enable-libjpeg
POPPLER_DEPENDENCIES += jpeg
else
POPPLER_CONF_OPTS += --disable-libjpeg
endif
ifeq ($(BR2_PACKAGE_LIBPNG),y)
POPPLER_CONF_OPTS += --enable-libpng
POPPLER_DEPENDENCIES += libpng
else
POPPLER_CONF_OPTS += --disable-libpng
endif
ifeq ($(BR2_PACKAGE_ZLIB),y)
POPPLER_CONF_OPTS += --enable-zlib
POPPLER_DEPENDENCIES += zlib
else
POPPLER_CONF_OPTS += --disable-zlib
endif
ifeq ($(BR2_PACKAGE_POPPLER_LIBCURL),y)
POPPLER_CONF_OPTS += --enable-libcurl
POPPLER_DEPENDENCIES += libcurl
else
POPPLER_CONF_OPTS += --disable-libcurl
endif
ifeq ($(BR2_PACKAGE_XORG7),y)
POPPLER_CONF_OPTS += --with-x
POPPLER_DEPENDENCIES += xlib_libX11 xlib_libXext
else
POPPLER_CONF_OPTS += --without-x
endif
ifeq ($(BR2_PACKAGE_POPPLER_QT),y)
POPPLER_DEPENDENCIES += qt
POPPLER_CONF_OPTS += --enable-poppler-qt4
else
POPPLER_CONF_OPTS += --disable-poppler-qt4
endif
ifeq ($(BR2_PACKAGE_OPENJPEG),y)
POPPLER_DEPENDENCIES += openjpeg
POPPLER_CONF_OPTS += --enable-libopenjpeg=openjpeg1
else
POPPLER_CONF_OPTS += --enable-libopenjpeg=none
endif
$(eval $(autotools-package))