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Noux: workaround for libtool problem

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Add the prefix '-Wl,' to static library names to keep them before shared
library names after libtool's command line reorderings.

Fixes #1928
This commit is contained in:
Christian Prochaska 2016-03-31 19:08:20 +02:00 committed by Christian Helmuth
parent f153bc9a74
commit a0d08d4bd1
1 changed files with 9 additions and 1 deletions
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10
repos/ports/mk/noux.mk
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@ -110,10 +110,18 @@ NOUX_CXXFLAGS += $(NOUX_COMMON_CFLAGS_CXXFLAGS)
# Unfortunately, the use of '--start-group' and '--end-group' does not suffice
# in all cases because 'libtool' strips those arguments from the 'LIBS' variable.
#
# Furthermore, 'libtool' reorders library names on the command line in a way that
# shared libraries appear before static libraries. This has the unfortunate effect
# that the program's entry symbol 'Genode::component_entry_point' in the static
# library 'component_entry_point.lib.a' is not found anymore. Passing the static
# library names as linker arguments (-Wl,...) works around this problem, because
# 'libtool' keeps command line arguments before the shared library names.
#
NOUX_LIBS_A = $(filter %.a, $(sort $(LINK_ITEMS)) $(EXT_OBJECTS) $(LIBGCC))
NOUX_LIBS_SO = $(filter %.so,$(sort $(LINK_ITEMS)) $(EXT_OBJECTS) $(LIBGCC))
NOUX_LIBS += $(NOUX_LIBS_A) $(NOUX_LIBS_SO) $(NOUX_LIBS_A)
comma := ,
NOUX_LIBS += $(addprefix -Wl$(comma),$(NOUX_LIBS_A)) $(NOUX_LIBS_SO) $(NOUX_LIBS_A)
#
# Re-configure the Makefile if the Genode build environment changes