[Buildroot] [PATCH V3 RESEND 3/5] aarch64: ilp32: add ilp32 compiler and linker flags

[Bamvor Jian Zhang]

From: Bamvor Jian Zhang <bamvor.zhangjian at huawei.com>

In aarch64, lp64 is the default ABI. Need pass the special flags if
the user want to compile and link ilp32 application.
Pass the special flags to linker to ensure that linker see the
same abi with compiler.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian at huawei.com>
---
 package/Makefile.in | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/package/Makefile.in b/package/Makefile.in
index 545694f..fa81b44 100644
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -107,6 +107,17 @@ ifeq ($(BR2_arc)$(BR2_ARC_ATOMIC_EXT),yy)
 TARGET_ABI += -matomic
 endif
 
+ifeq ($(BR2_GCC_TARGET_ABI), "ilp32")
+ifeq ($(BR2_aarch64)$(BR2_aarch64_be),y)
+ifeq ($(BR2_ENDIAN), "BIG")
+TARGET_ABI_LDFLAGS += -Xlinker -EB -Xlinker -maarch64linux32b
+else
+TARGET_ABI_LDFLAGS += -Xlinker -maarch64linux32
+endif
+TARGET_ABI += -mabi=ilp32 $(TARGET_ABI_LDFLAGS)
+endif
+endif
+
 STAGING_SUBDIR = usr/$(GNU_TARGET_NAME)/sysroot
 STAGING_DIR    = $(HOST_DIR)/$(STAGING_SUBDIR)
 
@@ -140,7 +151,7 @@ endif
 TARGET_CPPFLAGS += -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
 TARGET_CFLAGS = $(TARGET_CPPFLAGS) $(TARGET_ABI) $(TARGET_OPTIMIZATION) $(TARGET_DEBUGGING)
 TARGET_CXXFLAGS = $(TARGET_CFLAGS)
-TARGET_LDFLAGS = $(call qstrip,$(BR2_TARGET_LDFLAGS))
+TARGET_LDFLAGS = $(call qstrip,$(BR2_TARGET_LDFLAGS)) $(TARGET_ABI_LDFLAGS)
 
 ifeq ($(BR2_BINFMT_FLAT),y)
 TARGET_CFLAGS += $(if $($(PKG)_FLAT_STACKSIZE),-Wl$(comma)-elf2flt=-s$($(PKG)_FLAT_STACKSIZE),\
-- 
2.1.4