linux-tools/perf: fix build for MIPS by using the right emulation on LD

Passing just the endianness flag to LD is not enough. We need to pass
the right emulation flag which will set everything for us, not only the
endianness.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/linux-tools/linux-tool-perf.mk.in

@@ -28,17 +28,25 @@ PERF_MAKE_FLAGS = \
 	NO_LIBPYTHON=1 \
 	NO_LIBBIONIC=1
 
-# We need to pass an argument to ld for setting the endianness when
-# building it for MIPS architecture, otherwise the default one will
-# always be used (which is big endian) and the compilation for little
-# endian will always fail showing an error like this one:
-#  LD    foo.o
-# mips-linux-gnu-ld: foo.o: compiled for a little endian system and
-# target is big endian
-ifeq ($(BR2_mips)$(BR2_mips64),y)
-PERF_MAKE_FLAGS += LD="$(TARGET_LD) -EB"
-else ifeq ($(BR2_mipsel)$(BR2_mips64el),y)
-PERF_MAKE_FLAGS += LD="$(TARGET_LD) -EL"
+# We need to pass an argument to ld for setting the emulation when
+# building for MIPS architecture, otherwise the default one will always
+# be used and the compilation for most variants will fail.
+ifeq ($(BR2_mips),y)
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32btsmip"
+else ifeq ($(BR2_mipsel),y)
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32ltsmip"
+else ifeq ($(BR2_mips64),y)
+ifeq ($(BR2_MIPS_NABI32),y)
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32btsmipn32"
+else
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf64btsmip"
+endif
+else ifeq ($(BR2_mips64el),y)
+ifeq ($(BR2_MIPS_NABI32),y)
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf32ltsmipn32"
+else
+PERF_MAKE_FLAGS += LD="$(TARGET_LD) -m elf64ltsmip"
+endif
 endif
 
 # The call to backtrace() function fails for ARC, because for some