e9de6d9e0a
When TARGET_CFLAGS (or _LDFLAGS or _CXXFLAGS) are empty, but were
constructed by appending other variables, like:
TARGET_CFLAGS = $(SOMETHING) $(SOMETHING_ELSE)
and both variables are empty, then $(TARGET_CFLAGS) is _not_ the
null-string; it's value is a string made of a single space.
This means that the construct:
$(if $(TARGET_CFLAGS),true,false)
will in fact return 'true'.
In our case, it means that we will call:
`printf '"%s", ' `
which expands to just:
"",
which we are then happy to insert as-is in the generated
cross-compilation.conf.
Then meson, will happily call the compiler with an empty argument.
The compiler is less happy, though:
arm-none-linux-gnueabi-gcc: error: : No such file or directory
And this is not even trivial to debug either... The only clue being that
there seems to be something missing between ': :'
We fix that testing the $(strip)ed value. We can still pass the
non-$(strip) expansion, because the shell will just do it for us, and we
are then sure there is at least one non-blank word in there.
Thanks a lot to Adam for his invaluable help debugging this!
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Adam Duskett <aduskett@gmail.com>
Cc: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
71 lines
2.5 KiB
Makefile
71 lines
2.5 KiB
Makefile
################################################################################
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#
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# meson
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#
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################################################################################
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MESON_VERSION = 0.51.0
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MESON_SITE = https://github.com/mesonbuild/meson/releases/download/$(MESON_VERSION)
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MESON_LICENSE = Apache-2.0
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MESON_LICENSE_FILES = COPYING
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MESON_SETUP_TYPE = setuptools
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HOST_MESON_DEPENDENCIES = host-ninja
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HOST_MESON_NEEDS_HOST_PYTHON = python3
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HOST_MESON_TARGET_ENDIAN = $(call LOWERCASE,$(BR2_ENDIAN))
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HOST_MESON_TARGET_CPU = $(GCC_TARGET_CPU)
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# https://mesonbuild.com/Reference-tables.html#cpu-families
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ifeq ($(BR2_arcle)$(BR2_arceb),y)
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HOST_MESON_TARGET_CPU_FAMILY = arc
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else ifeq ($(BR2_arm)$(BR2_armeb),y)
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HOST_MESON_TARGET_CPU_FAMILY = arm
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else ifeq ($(BR2_aarch64)$(BR2_aarch64_be),y)
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HOST_MESON_TARGET_CPU_FAMILY = aarch64
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else ifeq ($(BR2_i386),y)
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HOST_MESON_TARGET_CPU_FAMILY = x86
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else ifeq ($(BR2_mips)$(BR2_mipsel),y)
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HOST_MESON_TARGET_CPU_FAMILY = mips
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else ifeq ($(BR2_mips64)$(BR2_mips64el),y)
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HOST_MESON_TARGET_CPU_FAMILY = mips64
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else ifeq ($(BR2_powerpc),y)
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HOST_MESON_TARGET_CPU_FAMILY = ppc
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else ifeq ($(BR2_powerpc64)$(BR2_powerpc64le),y)
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HOST_MESON_TARGET_CPU_FAMILY = ppc64
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else ifeq ($(BR2_riscv),y)
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HOST_MESON_TARGET_CPU_FAMILY = riscv64
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else ifeq ($(BR2_sparc),y)
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HOST_MESON_TARGET_CPU_FAMILY = sparc
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else ifeq ($(BR2_sparc64),y)
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HOST_MESON_TARGET_CPU_FAMILY = sparc64
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else ifeq ($(BR2_x86_64),y)
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HOST_MESON_TARGET_CPU_FAMILY = x86_64
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else
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HOST_MESON_TARGET_CPU_FAMILY = $(ARCH)
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endif
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HOST_MESON_SED_CFLAGS = $(if $(strip $(TARGET_CFLAGS)),`printf '"%s"$(comma) ' $(TARGET_CFLAGS)`)
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HOST_MESON_SED_LDFLAGS = $(if $(strip $(TARGET_LDFLAGS)),`printf '"%s"$(comma) ' $(TARGET_LDFLAGS)`)
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HOST_MESON_SED_CXXFLAGS = $(if $(strip $(TARGET_CXXFLAGS)),`printf '"%s"$(comma) ' $(TARGET_CXXFLAGS)`)
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# Generate a Meson cross-compilation.conf suitable for use with the
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# SDK
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define HOST_MESON_INSTALL_CROSS_CONF
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mkdir -p $(HOST_DIR)/etc/meson
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sed -e "s%@TARGET_CROSS@%$(TARGET_CROSS)%g" \
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-e "s%@TARGET_ARCH@%$(HOST_MESON_TARGET_CPU_FAMILY)%g" \
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-e "s%@TARGET_CPU@%$(HOST_MESON_TARGET_CPU)%g" \
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-e "s%@TARGET_ENDIAN@%$(HOST_MESON_TARGET_ENDIAN)%g" \
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-e "s%@TARGET_CFLAGS@%$(HOST_MESON_SED_CFLAGS)%g" \
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-e "s%@TARGET_LDFLAGS@%$(HOST_MESON_SED_LDFLAGS)%g" \
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-e "s%@TARGET_CXXFLAGS@%$(HOST_MESON_SED_CXXFLAGS)%g" \
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-e "s%@HOST_DIR@%$(HOST_DIR)%g" \
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$(HOST_MESON_PKGDIR)/cross-compilation.conf.in \
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> $(HOST_DIR)/etc/meson/cross-compilation.conf
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endef
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TARGET_FINALIZE_HOOKS += HOST_MESON_INSTALL_CROSS_CONF
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$(eval $(host-python-package))
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