Darwin, PowerPC, libgcc - Ensure unwinder is built with altivec enabled.

When libgcc is built on Darwin, it is usually built for the earliest potential
target (Darwin8, 10.4).  Build for that revision default to assuming that the
processor might be G3 (without vector ops) and there is an outlined function
used for save/restore that checks whether the processor is G3 or G4+ at run-
time.  However, the unwinder itself needs to be built with the assumption of
vector usage so that the relevant outlined functions are called.

2019-06-06  Iain Sandoe  <iain@sandoe.co.uk>

	* config/rs6000/t-darwin: Ensure that the unwinder is built with
	altivec enabled.

From-SVN: r272017

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 2a35363c86362d632363c658bc14b99be7064baf..2eb3f27155ad458ece013ba60fd2c2f0f962356a 100644 (file)
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-06  Iain Sandoe  <iain@sandoe.co.uk>
+
+       * config/rs6000/t-darwin: Ensure that the unwinder is built with
+       altivec enabled.
+
 2019-06-06  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
 
        * config/msp430/slli.S (__mspabi_slli_n): Put function in its own

diff --git a/libgcc/config/rs6000/t-darwin b/libgcc/config/rs6000/t-darwin
index abb41fc9bceb88246bb488f23e08c326579a64e7..61da0bdf13a700f7ebf130fc23f97e310a1cd12d 100644 (file)
--- a/libgcc/config/rs6000/t-darwin
+++ b/libgcc/config/rs6000/t-darwin
@@ -20,4 +20,7 @@ LIB2ADD_ST = \
 # earlier OSX versions.
 HOST_LIBGCC2_CFLAGS += -Wa,-force_cpusubtype_ALL -mmacosx-version-min=10.4
 
+unwind-dw2_s.o: HOST_LIBGCC2_CFLAGS += -maltivec
+unwind-dw2.o: HOST_LIBGCC2_CFLAGS += -maltivec
+
 LIB2ADDEH += $(srcdir)/config/rs6000/darwin-fallback.c