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kumquat-buildroot/package/pkg-meson.mk
Yann E. MORIN f4a61d1ae2 package/pkg-meson.mk avoid host ccache detection 
meson will by default try to detect the presence of ccache, and if
found, will use it unconditionally.

However, using a system-wide ccache, which would be using our own cache
directory, may very well conflict with our own ccache.

But there is no option to disable that meson behaviour. The only
workaround that is even the official documented way to do so, is to
actually pass environment variables that point to the compiler:

    https://mesonbuild.com/Feature-autodetection.html#ccache

For the host variants, we pass $(HOST_CONFIGURE_OPTS) in the environment,
and this contains correct settings for CC and CXX, so meson does not try
and detect ccache; it uses exactly what we tell it to use.

For the target variant, the settings for the cross-compiler are defined
in the cross-compilation file, and so meson just abides by our will. But
for the compiler-for-build, there is no way to specify the CC_FOR_BUILD
or CXX_FOR_BUILD via a cross-compilation file:

    https://mesonbuild.com/Machine-files.html
    https://mesonbuild.com/Cross-compilation.html

We could pass the full TARGET_CONFIGURE_OPTS in the environment, like we
do for the host variant, but this contains a lot more variables that are
supposed to be covered by the cross-compilation file.

So, we stay safe and just provide the exact two variables that meson
will use to avoid detecting ccache.

If the current configuration defines the use of ccache, then these two
variables will be properly setup to use our own ccache.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Gleb Mazovetskiy <glex.spb@gmail.com>
Cc: James Hilliard <james.hilliard1@gmail.com>
Cc: Norbert Lange <nolange79@gmail.com>
2021-01-21 22:11:46 +01:00

215 lines
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Makefile
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################################################################################
# Meson package infrastructure
#
# This file implements an infrastructure that eases development of
# package .mk files for Meson packages. It should be used for all
# packages that use Meson as their build system.
#
# See the Buildroot documentation for details on the usage of this
# infrastructure
#
# In terms of implementation, this Meson 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 Meson behaviour. The
# package can also define some post operation hooks.
#
################################################################################
#
# Pass PYTHONNOUSERSITE environment variable when invoking Meson or Ninja, so
# $(HOST_DIR)/bin/python3 will not look for Meson modules in
# $HOME/.local/lib/python3.x/site-packages
#
MESON = PYTHONNOUSERSITE=y $(HOST_DIR)/bin/meson
NINJA = PYTHONNOUSERSITE=y $(HOST_DIR)/bin/ninja
NINJA_OPTS = $(if $(VERBOSE),-v) -j$(PARALLEL_JOBS)
################################################################################
# inner-meson-package -- defines how the configuration, compilation and
# installation of a Meson package should be done, implements a few hooks to
# tune the build process and calls the generic package infrastructure to
# generate the necessary make targets
#
# argument 1 is the lowercase package name
# argument 2 is the uppercase package name, including a HOST_ prefix
# for host packages
# argument 3 is the uppercase package name, without the HOST_ prefix
# for host packages
# argument 4 is the type (target or host)
################################################################################
define inner-meson-package
$(2)_CONF_ENV ?=
$(2)_CONF_OPTS ?=
$(2)_NINJA_ENV ?=
#
# Configure step. Only define it if not already defined by the package
# .mk file. And take care of the differences between host and target
# packages.
#
ifndef $(2)_CONFIGURE_CMDS
ifeq ($(4),target)
$(2)_CFLAGS ?= $$(TARGET_CFLAGS)
$(2)_LDFLAGS ?= $$(TARGET_LDFLAGS)
$(2)_CXXFLAGS ?= $$(TARGET_CXXFLAGS)
# Configure package for target
#
#
define $(2)_CONFIGURE_CMDS
rm -rf $$($$(PKG)_SRCDIR)/build
mkdir -p $$($$(PKG)_SRCDIR)/build
sed -e 's%@TARGET_CROSS@%$$(TARGET_CROSS)%g' \
-e 's%@TARGET_ARCH@%$$(HOST_MESON_TARGET_CPU_FAMILY)%g' \
-e 's%@TARGET_CPU@%$$(HOST_MESON_TARGET_CPU)%g' \
-e 's%@TARGET_ENDIAN@%$$(HOST_MESON_TARGET_ENDIAN)%g' \
-e "s%@TARGET_CFLAGS@%$$(call make-sq-comma-list,$$($(2)_CFLAGS))%g" \
-e "s%@TARGET_LDFLAGS@%$$(call make-sq-comma-list,$$($(2)_LDFLAGS))%g" \
-e "s%@TARGET_CXXFLAGS@%$$(call make-sq-comma-list,$$($(2)_CXXFLAGS))%g" \
-e 's%@HOST_DIR@%$$(HOST_DIR)%g' \
-e 's%@STAGING_DIR@%$$(STAGING_DIR)%g' \
-e 's%@STATIC@%$$(if $$(BR2_STATIC_LIBS),true,false)%g' \
-e "/^\[binaries\]$$$$/s:$$$$:$$(foreach x,$$($(2)_MESON_EXTRA_BINARIES),\n$$(x)):" \
-e "/^\[properties\]$$$$/s:$$$$:$$(foreach x,$$($(2)_MESON_EXTRA_PROPERTIES),\n$$(x)):" \
package/meson/cross-compilation.conf.in \
> $$($$(PKG)_SRCDIR)/build/cross-compilation.conf
PATH=$$(BR_PATH) \
CC_FOR_BUILD="$(HOSTCC)" \
CXX_FOR_BUILD="$(HOSTCC)" \
$$($$(PKG)_CONF_ENV) \
$$(MESON) \
--prefix=/usr \
--libdir=lib \
--default-library=$(if $(BR2_STATIC_LIBS),static,shared) \
--buildtype=$(if $(BR2_ENABLE_DEBUG),debug,release) \
--cross-file=$$($$(PKG)_SRCDIR)/build/cross-compilation.conf \
-Dstrip=false \
-Dbuild.pkg_config_path=$$(HOST_DIR)/lib/pkgconfig \
$$($$(PKG)_CONF_OPTS) \
$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/build
endef
else
# Configure package for host
define $(2)_CONFIGURE_CMDS
rm -rf $$($$(PKG)_SRCDIR)/build
mkdir -p $$($$(PKG)_SRCDIR)/build
$$(HOST_CONFIGURE_OPTS) \
$$($$(PKG)_CONF_ENV) $$(MESON) \
--prefix=$$(HOST_DIR) \
--libdir=lib \
--sysconfdir=$$(HOST_DIR)/etc \
--localstatedir=$$(HOST_DIR)/var \
--default-library=shared \
--buildtype=release \
-Dstrip=true \
$$($$(PKG)_CONF_OPTS) \
$$($$(PKG)_SRCDIR) $$($$(PKG)_SRCDIR)/build
endef
endif
endif
$(2)_DEPENDENCIES += host-meson
#
# Build step. Only define it if not already defined by the package .mk
# file.
#
ifndef $(2)_BUILD_CMDS
ifeq ($(4),target)
define $(2)_BUILD_CMDS
$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build
endef
else
define $(2)_BUILD_CMDS
$$(HOST_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
$$(NINJA) $$(NINJA_OPTS) $$($$(PKG)_NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build
endef
endif
endif
#
# Host installation step. Only define it if not already defined by the
# package .mk file.
#
ifndef $(2)_INSTALL_CMDS
define $(2)_INSTALL_CMDS
$$(HOST_MAKE_ENV) $$($$(PKG)_NINJA_ENV) \
$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
endef
endif
#
# Staging installation step. Only define it if not already defined by
# the package .mk file.
#
ifndef $(2)_INSTALL_STAGING_CMDS
define $(2)_INSTALL_STAGING_CMDS
$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) DESTDIR=$$(STAGING_DIR) \
$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
endef
endif
#
# Target installation step. Only define it if not already defined by
# the package .mk file.
#
ifndef $(2)_INSTALL_TARGET_CMDS
define $(2)_INSTALL_TARGET_CMDS
$$(TARGET_MAKE_ENV) $$($$(PKG)_NINJA_ENV) DESTDIR=$$(TARGET_DIR) \
$$(NINJA) $$(NINJA_OPTS) -C $$($$(PKG)_SRCDIR)/build install
endef
endif
# Call the generic package infrastructure to generate the necessary
# make targets
$(call inner-generic-package,$(1),$(2),$(3),$(4))
endef
################################################################################
# meson-package -- the target generator macro for Meson packages
################################################################################
meson-package = $(call inner-meson-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)
host-meson-package = $(call inner-meson-package,host-$(pkgname),$(call UPPERCASE,host-$(pkgname)),$(call UPPERCASE,$(pkgname)),host)
################################################################################
# Generation of the Meson cross-compilation.conf file
################################################################################
# Generate a Meson cross-compilation.conf suitable for use with the
# SDK; also install the file as a template for users to add their
# own flags if they need to.
define PKG_MESON_INSTALL_CROSS_CONF
mkdir -p $(HOST_DIR)/etc/meson
sed -e 's%@TARGET_CROSS@%$(TARGET_CROSS)%g' \
-e 's%@TARGET_ARCH@%$(HOST_MESON_TARGET_CPU_FAMILY)%g' \
-e 's%@TARGET_CPU@%$(HOST_MESON_TARGET_CPU)%g' \
-e 's%@TARGET_ENDIAN@%$(HOST_MESON_TARGET_ENDIAN)%g' \
-e "s%@TARGET_CFLAGS@%$(call make-sq-comma-list,$(TARGET_CFLAGS))@PKG_TARGET_CFLAGS@%g" \
-e "s%@TARGET_LDFLAGS@%$(call make-sq-comma-list,$(TARGET_LDFLAGS))@PKG_TARGET_CFLAGS@%g" \
-e "s%@TARGET_CXXFLAGS@%$(call make-sq-comma-list,$(TARGET_CXXFLAGS))@PKG_TARGET_CFLAGS@%g" \
-e 's%@HOST_DIR@%$(HOST_DIR)%g' \
-e 's%@STAGING_DIR@%$(STAGING_DIR)%g' \
-e 's%@STATIC@%$(if $(BR2_STATIC_LIBS),true,false)%g' \
$(HOST_MESON_PKGDIR)/cross-compilation.conf.in \
> $(HOST_DIR)/etc/meson/cross-compilation.conf.in
sed -e 's%@PKG_TARGET_CFLAGS@%%g' \
-e 's%@PKG_TARGET_LDFLAGS@%%g' \
-e 's%@PKG_TARGET_CXXFLAGS@%%g' \
$(HOST_DIR)/etc/meson/cross-compilation.conf.in \
> $(HOST_DIR)/etc/meson/cross-compilation.conf
endef
TOOLCHAIN_TARGET_FINALIZE_HOOKS += PKG_MESON_INSTALL_CROSS_CONF
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