4a9df29424
For some platforms, hardware-assisted compare-and-swap may not be
available, so libatomic_ops will not provide it.
However, libatomic_ops can provide a purely software CAS emulation, but
must be instructed to do so. erlang just forgot to tell libatomic_ops
that it does require CAS.
Fix that by defining AO_REQUIRE_CAS before including atmoic_ops.h, like
is done in libunwind, as pointed out by Thomas.
Also, erlang has a convoluted, mind-alterating set on aclocal.m4 macros,
that just forgets to link against -latomic_ops when checking CAS is
available, so that even if CAS is available, configure chokes.
Since I would like to keep the little sanity I still have, just force
linking with -latomic_ops. This is useless when the check is natrally
sucessful (i.e. on platforms where CAS is available in HW), but we
would eventually link with -latomic_ops there, too; it's just redundant.
Overall, just consider that erlang requires libatomic_ops, so forcibly
depend on it, it is easier than trying to disable it. We can revisit
that whenever someone wants to run erlang on a platform for which there
is no libatomic_ops support.
Fixes a slew of autobuild ARM failures:
http://autobuild.buildroot.org/results/e7b/e7bfc4893dea6b133f0794ef44d50ad89bcb6662/
http://autobuild.buildroot.org/results/3e9/3e9c307f1ec6536482641019dcaa94677f7267a3/
http://autobuild.buildroot.org/results/a85/a85ca414e5b67af46510abd7b610eb5ae8661de4/
[...]
[Thomas: fix minor typos in commit log, add dependency on
BR2_PACKAGE_LIBATOMIC_ARCH_SUPPORTS to the Erlang comment about thread
and shared library dependency.]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Frank Hunleth <fhunleth@troodon-software.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
80 lines
2.2 KiB
Makefile
80 lines
2.2 KiB
Makefile
################################################################################
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#
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# erlang
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#
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################################################################################
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ERLANG_VERSION = 17.4
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ERLANG_SITE = http://www.erlang.org/download
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ERLANG_SOURCE = otp_src_$(ERLANG_VERSION).tar.gz
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ERLANG_DEPENDENCIES = host-erlang
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ERLANG_LICENSE = EPL
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ERLANG_LICENSE_FILES = EPLICENCE
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ERLANG_INSTALL_STAGING = YES
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# Touching erts/configure.in
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ERLANG_AUTORECONF = YES
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# The configure checks for these functions fail incorrectly
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ERLANG_CONF_ENV = ac_cv_func_isnan=yes ac_cv_func_isinf=yes
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# Set erl_xcomp variables. See xcomp/erl-xcomp.conf.template
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# for documentation.
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ERLANG_CONF_ENV += erl_xcomp_sysroot=$(STAGING_DIR)
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ERLANG_CONF_OPTS = --without-javac
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ERLANG_DEPENDENCIES += libatomic_ops
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ERLANG_CONF_OPTS += --with-libatomic_ops=$(STAGING_DIR)/usr LIBS=-latomic_ops
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# erlang uses openssl for all things crypto. Since the host tools (such as
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# rebar) uses crypto, we need to build host-erlang with support for openssl.
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HOST_ERLANG_DEPENDENCIES = host-openssl
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HOST_ERLANG_CONF_OPTS = --without-javac --with-ssl=$(HOST_DIR)/usr
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HOST_ERLANG_CONF_OPTS += --without-termcap
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ifeq ($(BR2_PACKAGE_NCURSES),y)
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ERLANG_CONF_OPTS += --with-termcap
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ERLANG_DEPENDENCIES += ncurses
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else
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ERLANG_CONF_OPTS += --without-termcap
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endif
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ifeq ($(BR2_PACKAGE_OPENSSL),y)
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ERLANG_CONF_OPTS += --with-ssl
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ERLANG_DEPENDENCIES += openssl
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else
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ERLANG_CONF_OPTS += --without-ssl
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endif
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ifeq ($(BR2_PACKAGE_ZLIB),y)
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ERLANG_CONF_OPTS += --enable-shared-zlib
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ERLANG_DEPENDENCIES += zlib
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endif
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ifeq ($(BR2_PACKAGE_ERLANG_SMP),)
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ERLANG_CONF_OPTS += --disable-smp-support
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endif
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# Remove source, example, gs and wx files from the target
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ERLANG_REMOVE_PACKAGES = gs wx
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ifneq ($(BR2_PACKAGE_ERLANG_MEGACO),y)
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ERLANG_REMOVE_PACKAGES += megaco
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endif
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define ERLANG_REMOVE_UNUSED
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find $(TARGET_DIR)/usr/lib/erlang -type d -name src -prune -exec rm -rf {} \;
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find $(TARGET_DIR)/usr/lib/erlang -type d -name examples -prune -exec rm -rf {} \;
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for package in $(ERLANG_REMOVE_PACKAGES); do \
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rm -rf $(TARGET_DIR)/usr/lib/erlang/lib/$${package}-*; \
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done
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endef
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ERLANG_POST_INSTALL_TARGET_HOOKS += ERLANG_REMOVE_UNUSED
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$(eval $(autotools-package))
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$(eval $(host-autotools-package))
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