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syslinux is... special. It is a target package, but it is installed in HOST_DIR *in the target install commands*: in addition to the boot files that run on the target, syslinux installs a set of host tools that are to be used at build time (e.g. extlinux, to prepare bootable media, like an iso96660 image). Then, from HOST_DIR, the actual boot files are copied into BINARIES_DIR (i.e. images/); we do it that way because the boot files are scattered about everywhere in the build tree, while they are all packed together in a single directory once installed. However, there is no dependency between the target and image install steps. So, when using top-level parallel builds, there is no guarantee that the target install commands are finished before the image install commands are started. We fix that by first installing into a temporary location, as part of the build step, and by then copying from there as part of the install step. This ensures that the boot files are easily available, without needing a dependency on the target install step, that we can't express. Note that we do not change the actual installation into HOST_DIR: it can be set up differently that our temporary location, and we do not want to duplicate that setup here (it's going to diverge over time). Signed-off-by: Yann E. MORIN <yann.morin@orange.com> Signed-off-by: Julien Olivain <ju.o@free.fr>
127 lines
4.4 KiB
Makefile
127 lines
4.4 KiB
Makefile
################################################################################
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#
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# syslinux to make target msdos/iso9660 filesystems bootable
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#
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################################################################################
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SYSLINUX_VERSION = 6.03
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SYSLINUX_SOURCE = syslinux-$(SYSLINUX_VERSION).tar.xz
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SYSLINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/utils/boot/syslinux
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SYSLINUX_LICENSE = GPL-2.0+
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SYSLINUX_LICENSE_FILES = COPYING
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SYSLINUX_INSTALL_IMAGES = YES
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# host-util-linux needed to provide libuuid when building host tools
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SYSLINUX_DEPENDENCIES = \
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host-nasm \
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host-python3 \
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host-upx \
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host-util-linux \
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util-linux
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ifeq ($(BR2_TARGET_SYSLINUX_LEGACY_BIOS),y)
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SYSLINUX_TARGET += bios
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endif
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# The syslinux build system must be forced to use Buildroot's gnu-efi
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# package by setting EFIINC, LIBDIR and LIBEFI. Otherwise, it uses its
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# own copy of gnu-efi included in syslinux's sources since 6.03
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# release.
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ifeq ($(BR2_TARGET_SYSLINUX_EFI),y)
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ifeq ($(BR2_ARCH_IS_64),y)
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SYSLINUX_EFI_BITS = efi64
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else
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SYSLINUX_EFI_BITS = efi32
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endif # 64-bit
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SYSLINUX_DEPENDENCIES += gnu-efi
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SYSLINUX_TARGET += $(SYSLINUX_EFI_BITS)
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SYSLINUX_EFI_ARGS = \
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EFIINC=$(STAGING_DIR)/usr/include/efi \
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LIBDIR=$(STAGING_DIR)/usr/lib \
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LIBEFI=$(STAGING_DIR)/usr/lib/libefi.a
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endif # EFI
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# The syslinux tarball comes with pre-compiled binaries.
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# Since timestamps might not be in the correct order, a rebuild is
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# not always triggered for all the different images.
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# Cleanup the mess even before we attempt a build, so we indeed
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# build everything from source.
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define SYSLINUX_CLEANUP
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rm -rf $(@D)/bios $(@D)/efi32 $(@D)/efi64
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endef
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SYSLINUX_POST_PATCH_HOOKS += SYSLINUX_CLEANUP
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# syslinux build system has no convenient way to pass CFLAGS,
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# and the internal zlib should take precedence so -I shouldn't
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# be used.
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# Install in a temporary location that eases final install into
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# images/ (see corresponding command, below).
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# Repeat the target, otherwise syslinux will try to build everything
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# Repeat LD (and CC) as it happens that some binaries are linked at
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# install-time.
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define SYSLINUX_BUILD_CMDS
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$(TARGET_MAKE_ENV) $(MAKE1) \
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ASCIIDOC_OK=-1 \
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A2X_XML_OK=-1 \
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CC="$(TARGET_CC)" \
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LD="$(TARGET_LD)" \
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OBJCOPY="$(TARGET_OBJCOPY)" \
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AS="$(TARGET_AS)" \
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NASM="$(HOST_DIR)/bin/nasm" \
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CC_FOR_BUILD="$(HOSTCC)" \
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CFLAGS_FOR_BUILD="$(HOST_CFLAGS)" \
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LDFLAGS_FOR_BUILD="$(HOST_LDFLAGS)" \
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PYTHON=$(HOST_DIR)/bin/python3 \
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$(SYSLINUX_EFI_ARGS) -C $(@D) $(SYSLINUX_TARGET)
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$(TARGET_MAKE_ENV) $(MAKE1) $(SYSLINUX_EFI_ARGS) INSTALLROOT=$(@D)/br-root.temp \
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CC="$(TARGET_CC)" \
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LD="$(TARGET_LD)" \
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-C $(@D) $(SYSLINUX_TARGET) install
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endef
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# While the actual bootloader is compiled for the target, several
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# utilities for installing the bootloader are meant for the host.
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# Repeat the target, otherwise syslinux will try to build everything
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# Repeat LD (and CC) as it happens that some binaries are linked at
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# install-time.
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# Don't use the temporarily-installed br-root.temp: HOST_DIR may be setup
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# differently (merged usr, merged bin...)
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define SYSLINUX_INSTALL_TARGET_CMDS
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$(TARGET_MAKE_ENV) $(MAKE1) $(SYSLINUX_EFI_ARGS) INSTALLROOT=$(HOST_DIR) \
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CC="$(TARGET_CC)" \
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LD="$(TARGET_LD)" \
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-C $(@D) $(SYSLINUX_TARGET) install
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endef
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# That 'syslinux' binary is an installer actually built for the target.
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# However, buildroot makes no usage of it, so better delete it than have it
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# installed at the wrong place
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define SYSLINUX_POST_INSTALL_CLEANUP
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rm -rf $(HOST_DIR)/bin/syslinux
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endef
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SYSLINUX_POST_INSTALL_TARGET_HOOKS += SYSLINUX_POST_INSTALL_CLEANUP
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SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_ISOLINUX) += bios/core/isolinux.bin
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SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_PXELINUX) += bios/core/pxelinux.bin
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SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_MBR) += bios/mbr/mbr.bin
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SYSLINUX_IMAGES-$(BR2_TARGET_SYSLINUX_EFI) += $(SYSLINUX_EFI_BITS)/efi/syslinux.efi
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SYSLINUX_C32 = $(call qstrip,$(BR2_TARGET_SYSLINUX_C32))
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# We install the c32 modules from the temporarily installed tree, where
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# they are all neatly installed in a single location, while they are
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# scattered around everywhere in the build tree.
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define SYSLINUX_INSTALL_IMAGES_CMDS
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for i in $(SYSLINUX_IMAGES-y); do \
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$(INSTALL) -D -m 0755 $(@D)/$$i $(BINARIES_DIR)/syslinux/$${i##*/}; \
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done
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for i in $(SYSLINUX_C32); do \
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$(INSTALL) -D -m 0755 $(@D)/br-root.temp/usr/share/syslinux/$${i} \
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$(BINARIES_DIR)/syslinux/$${i}; \
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done
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endef
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$(eval $(generic-package))
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