buildroot

################################################################################

# Autotools package infrastructure

#

# This file implements an infrastructure that eases development of

# package .mk files for autotools packages. It should be used for all

# packages that use the autotools as their build system.

#

# See the Buildroot documentation for details on the usage of this

# infrastructure

#

# In terms of implementation, this autotools infrastructure requires

# the .mk file to only specify metadata information about the

# package: name, version, download URL, etc.

#

# We still allow the package .mk file to override what the different

# steps are doing, if needed. For example, if <PKG>_BUILD_CMDS is

# already defined, it is used as the list of commands to perform to

# build the package, instead of the default autotools behaviour. The

# package can also define some post operation hooks.

#

################################################################################

​

​

#

# Utility function to upgrade config.sub and config.guess files

#

# argument 1 : directory into which config.guess and config.sub need

# to be updated. Note that config.sub and config.guess are searched

# recursively in this directory.

#

define CONFIG_UPDATE

    for file in config.guess config.sub; do \

        for i in $$(find $(1) -name $$file); do \

            cp support/gnuconfig/$$file $$i; \

        done; \

    done

endef

​

# This function generates the ac_cv_file_<foo> value for a given

# filename. This is needed to convince configure script doing

# AC_CHECK_FILE() tests that the file actually exists, since such

# tests cannot be done in a cross-compilation context. This function

# takes as argument the path of the file. An example usage is:

#

#  FOOBAR_CONF_ENV = \

#   $(call AUTOCONF_AC_CHECK_FILE_VAL,/dev/random)=yes

AUTOCONF_AC_CHECK_FILE_VAL = ac_cv_file_$(subst -,_,$(subst /,_,$(subst .,_,$(1))))

​

#

# Hook to update config.sub and config.guess if needed

#

define UPDATE_CONFIG_HOOK

    @$(call MESSAGE,"Updating config.sub and config.guess")

    $(call CONFIG_UPDATE,$(@D))

endef

​

#

# Hook to patch libtool to make it work properly for cross-compilation

#

define LIBTOOL_PATCH_HOOK

    @$(call MESSAGE,"Patching libtool")

    $(Q)for i in `find $($(PKG)_SRCDIR) -name ltmain.sh`; do \

        ltmain_version=`sed -n '/^[ \t]*VERSION=/{s/^[ \t]*VERSION=//;p;q;}' $$i | \