0fc5c1ccdb
On some architectures when building with -O0 the __register_frame symbol fails to get optimized out which can cause linking failures when building glibc. To fix this set -O1 for GCC target libs when building with glibc and BR2_OPTIMIZE_0 on the problematic target architectures. This was reported both to GCC [1] and glibc [2] upstream. It is not entirely clear yet where the bug lies exactly. At the moment the assumption is that it's GCC, so create a symbol BR2_TOOLCHAIN_HAS_GCC_BUG_107728. This issue only seems to occur when linking glibc, not with anything else, so only compile libgcc from host-gcc-initial with -O1. Fixes: - http://autobuild.buildroot.net/results/89b/89b6c6924240b7cf82035a844f3573673e91b364 - http://autobuild.buildroot.net/results/46f/46f4ec99d2b23d354a4bb5e92123d64f0da6ed27 - http://autobuild.buildroot.net/results/839/839f929f700cf181ebdf34389c7806a96f55813e - http://autobuild.buildroot.net/results/0e2/0e202bf53a683930f3cad6edef2a4dea629eaecb - http://autobuild.buildroot.net/results/8a8/8a8c917f597fdcca744e696e19e9300b64004335 - http://autobuild.buildroot.net/results/c05/c058b27ed2834dfa633b63ec6c3639ab1e8bf412 - http://autobuild.buildroot.net/results/8ba/8ba8882a861cf7df359c23969c09b2be0725b2e5 [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107728 [2] https://sourceware.org/bugzilla/show_bug.cgi?id=29621 Signed-off-by: James Hilliard <james.hilliard1@gmail.com> Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
62 lines
2.2 KiB
Makefile
62 lines
2.2 KiB
Makefile
################################################################################
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#
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# gcc-initial
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#
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################################################################################
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GCC_INITIAL_VERSION = $(GCC_VERSION)
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GCC_INITIAL_SITE = $(GCC_SITE)
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GCC_INITIAL_SOURCE = $(GCC_SOURCE)
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# We do not have a 'gcc' package per-se; we only have two incarnations,
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# gcc-initial and gcc-final. gcc-initial is just am internal step that
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# users should not care about, while gcc-final is the one they shall see.
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HOST_GCC_INITIAL_DL_SUBDIR = gcc
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HOST_GCC_INITIAL_DEPENDENCIES = $(HOST_GCC_COMMON_DEPENDENCIES)
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HOST_GCC_INITIAL_EXCLUDES = $(HOST_GCC_EXCLUDES)
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ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
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HOST_GCC_INITIAL_POST_EXTRACT_HOOKS += HOST_GCC_XTENSA_OVERLAY_EXTRACT
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HOST_GCC_INITIAL_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
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endif
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HOST_GCC_INITIAL_POST_PATCH_HOOKS += HOST_GCC_APPLY_PATCHES
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# gcc doesn't support in-tree build, so we create a 'build'
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# subdirectory in the gcc sources, and build from there.
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HOST_GCC_INITIAL_SUBDIR = build
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HOST_GCC_INITIAL_PRE_CONFIGURE_HOOKS += HOST_GCC_CONFIGURE_SYMLINK
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HOST_GCC_INITIAL_CONF_OPTS = \
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$(HOST_GCC_COMMON_CONF_OPTS) \
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--enable-languages=c \
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--disable-shared \
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--without-headers \
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--disable-threads \
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--with-newlib \
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--disable-largefile \
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$(call qstrip,$(BR2_EXTRA_GCC_CONFIG_OPTIONS))
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HOST_GCC_INITIAL_CONF_ENV = \
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$(HOST_GCC_COMMON_CONF_ENV)
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# Enable GCC target libs optimizations to optimize out __register_frame
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# when needed for some architectures when building with glibc.
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ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_107728),y)
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HOST_GCC_INITIAL_CONF_ENV += CFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CFLAGS) -O1"
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HOST_GCC_INITIAL_CONF_ENV += CXXFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CXXFLAGS) -O1"
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endif
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HOST_GCC_INITIAL_MAKE_OPTS = $(HOST_GCC_COMMON_MAKE_OPTS) all-gcc all-target-libgcc
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HOST_GCC_INITIAL_INSTALL_OPTS = install-gcc install-target-libgcc
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HOST_GCC_INITIAL_TOOLCHAIN_WRAPPER_ARGS += $(HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS)
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HOST_GCC_INITIAL_POST_BUILD_HOOKS += TOOLCHAIN_WRAPPER_BUILD
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HOST_GCC_INITIAL_POST_INSTALL_HOOKS += TOOLCHAIN_WRAPPER_INSTALL
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HOST_GCC_INITIAL_POST_INSTALL_HOOKS += HOST_GCC_INSTALL_WRAPPER_AND_SIMPLE_SYMLINKS
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$(eval $(host-autotools-package))
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