Running ld with '-r' switches the linker to a very special mode where some other linker options don't make sense.
In particular, '--export-dynamic' normally requires that all global symbols be included in the dynamic symbol table, but a .o file doesn't even have a dynamic symbol table. When given both options it looks like the gnu linker just ignores '--export-dynamic'. Unfortunately some versions of lld (https://lld.llvm.org/) have a bug that causes it to try to create a dynamic symbol table in the output .o file and ends up corrupting it (https://bugs.llvm.org/show_bug.cgi?id=43552). Current (git) version of lld now issues an error. This patch drops $(LDFLAGS) when using -r. With this patch I can build dpdk with lld. Signed-off-by: Rafael Ávila de Espíndola <espind...@scylladb.com> --- mk/internal/rte.compile-pre.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mk/internal/rte.compile-pre.mk b/mk/internal/rte.compile-pre.mk index 0cf3791b4..6cd7e559a 100644 --- a/mk/internal/rte.compile-pre.mk +++ b/mk/internal/rte.compile-pre.mk @@ -61,7 +61,7 @@ CHECK_EXPERIMENTAL = $(EXPERIMENTAL_CHECK) $(SRCDIR)/$(EXPORT_MAP) $@ PMDINFO_GEN = $(RTE_SDK_BIN)/app/dpdk-pmdinfogen $@ $@.pmd.c PMDINFO_CC = $(CC) $(CPPFLAGS) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@.pmd.o $@.pmd.c -PMDINFO_LD = $(CROSS)ld $(LDFLAGS) -r -o $@.o $@.pmd.o $@ +PMDINFO_LD = $(CROSS)ld -r -o $@.o $@.pmd.o $@ PMDINFO_TO_O = if grep -q 'RTE_PMD_REGISTER_.*(.*)' $<; then \ echo "$(if $V,$(PMDINFO_GEN), PMDINFO $@.pmd.c)" && \ $(PMDINFO_GEN) && \ -- 2.21.0
