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build: move -lrt to a new SYS_LIBS variable

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On some platforms, librt may be a static library, so linker command line
order matters.  Create a new Makefile variable, SYS_LIBS, which is added
to the end of all link commands and move -lrt there.

Change-Id: Ie28ebd91a255097bf33cbcf9f0f74f7177a0b142
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2016-06-23 09:29:22 -07:00
parent 0faa2948b5
commit ce60297bda
1 changed files with 5 additions and 3 deletions
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8
mk/spdk.common.mk
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@ -105,7 +105,9 @@ LDFLAGS += -fsanitize=address
endif endif
COMMON_CFLAGS += -pthread COMMON_CFLAGS += -pthread
LDFLAGS += -pthread -lrt LDFLAGS += -pthread
SYS_LIBS += -lrt
MAKEFLAGS += --no-print-directory MAKEFLAGS += --no-print-directory
@ -127,11 +129,11 @@ COMPILE_CXX=\
# Link $(OBJS) and $(LIBS) into $@ (app) # Link $(OBJS) and $(LIBS) into $@ (app)
LINK_C=\ LINK_C=\
$(Q)echo " LINK $S/$@"; \ $(Q)echo " LINK $S/$@"; \
$(CC) -o $@ $(CPPFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) $(CC) -o $@ $(CPPFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) $(SYS_LIBS)
LINK_CXX=\ LINK_CXX=\
$(Q)echo " LINK $S/$@"; \ $(Q)echo " LINK $S/$@"; \
$(CXX) -o $@ $(CPPFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) $(CXX) -o $@ $(CPPFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) $(SYS_LIBS)
# Archive $(OBJS) into $@ (.a) # Archive $(OBJS) into $@ (.a)
LIB_C=\ LIB_C=\