NDK build - specify linker settings per architecture

Question

My Application.mk is set to build arm as well as x86 shared libraries:

APP_ABI :- armeabi-v7a x86

I have prebuilt openssl static libraries:

libcrypto_v7a.a
libcrypto_x86.a
libssl_v7a.a
libssl_x86.a

These files have been copied to jni/inc directory:

Would appreciate your help in setting up Android.mk such that it picks up proper library to link with:

LOCAL_LDLIBS    := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_v7a -lssl_v7a

or

LOCAL_LDLIBS    := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_x86 -lssl_x86

Perhaps there is a $(ARCH) kind of variable defined that I could use to my advantage:

LOCAL_LDLIBS    := -llog -L$(LOCAL_PATH)/inc/ -lcrypto_$(ARCH) -lssl_$(ARCH)

Answer 1

What about using ifeq and TARGET_ARCH?

LOCAL_LDLIBS := -llog -L$(LOCAL_PATH)/inc/ 
ifeq ($(TARGET_ARCH),arm)
  LOCAL_LDLIBS += -lcrypto_v7a -lssl_v7a
else
  ifeq ($(TARGET_ARCH),x86)
    LOCAL_LDLIBS += -lcrypto_x86 -lssl_x86
  endif
endif

Answer 2

Another alternative is:

MY_LDLIBS_arm := -lcrypto_v7a -lssl_v7a
MY_LDLIBS_x86 := -lcrypto_x86 -lssl_x86
MY_LDLIBS_mips := ...

LOCAL_LDLIBS += $(MY_LDLIBS_$(TARGET_ARCH))

Which is easier to read and write.