libunwind: fix build when unused sections are garbage collected

poky-tiny uses gcsections.inc to strip unused sections from the
binaries.  However, on qemuarm5/qemuarm64 with poky-tiny this appears to
result in too much being removed and the link fails:

  ld: .libs/Gtest-trace: hidden symbol `__aarch64_cas8_acq_rel' in
  libgcc.a(cas_8_4.o) is referenced by DSO

Work around this by disabling gcsections.inc.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-support/libunwind/libunwind_1.8.1.bb b/meta/recipes-support/libunwind/libunwind_1.8.1.bb
index b2c592b4350e1edf25a39d81a2811d06eabfe6c1..da87f3e3ee8b37f0f96bdc5f71a1960be154a137 100644 (file)
--- a/meta/recipes-support/libunwind/libunwind_1.8.1.bb
+++ b/meta/recipes-support/libunwind/libunwind_1.8.1.bb
@@ -33,6 +33,10 @@ EXTRA_OECONF = "--enable-static"
 ARM_INSTRUCTION_SET:armv4 = "arm"
 ARM_INSTRUCTION_SET:armv5 = "arm"
 
+# With qemuarm64 and poky-tiny:
+# ld: .libs/Gtest-trace: hidden symbol `__aarch64_cas8_acq_rel' in libgcc.a(cas_8_4.o) is referenced by DSO
+LDFLAGS_SECTION_REMOVAL = ""
+
 LDFLAGS += "-Wl,-z,relro,-z,now"
 
 SECURITY_LDFLAGS:append:libc-musl = " -lssp_nonshared"