Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/openssl/android-config.mk

@@ -0,0 +1,48 @@
+#
+# These flags represent the build-time configuration of OpenSSL for android
+#
+# The value of $(openssl_cflags) was pruned from the Makefile generated
+# by running ./Configure from import_openssl.sh.
+#
+# This script performs minor but required patching for the Android build.
+#
+
+# Directories for ENGINE shared libraries
+openssl_cflags_32 += \
+  -DOPENSSLDIR="\"/system/lib/ssl\"" \
+  -DENGINESDIR="\"/system/lib/ssl/engines\""
+openssl_cflags_static_32 += \
+  -DOPENSSLDIR="\"/system/lib/ssl\"" \
+  -DENGINESDIR="\"/system/lib/ssl/engines\""
+openssl_cflags_64 += \
+  -DOPENSSLDIR="\"/system/lib64/ssl\"" \
+  -DENGINESDIR="\"/system/lib64/ssl/engines\""
+openssl_cflags_static_64 += \
+  -DOPENSSLDIR="\"/system/lib64/ssl\"" \
+  -DENGINESDIR="\"/system/lib64/ssl/engines\""
+
+# Intentionally excluded http://b/7079965
+ifneq (,$(filter -DZLIB, $(openssl_cflags_32) $(openssl_cflags_64) \
+    $(openssl_cflags_static_32) $(openssl_cflags_static_64)))
+$(error ZLIB should not be enabled in openssl configuration)
+endif
+
+LOCAL_CFLAGS_32 += $(openssl_cflags_32)
+LOCAL_CFLAGS_64 += $(openssl_cflags_64)
+
+LOCAL_CFLAGS_32 := $(filter-out -DTERMIO, $(LOCAL_CFLAGS_32))
+LOCAL_CFLAGS_64 := $(filter-out -DTERMIO, $(LOCAL_CFLAGS_64))
+# filter out static flags too
+openssl_cflags_static_32 := $(filter-out -DTERMIO, $(openssl_cflags_static_32))
+openssl_cflags_static_64 := $(filter-out -DTERMIO, $(openssl_cflags_static_64))
+
+ifeq ($(HOST_OS),windows)
+LOCAL_CFLAGS_32 := $(filter-out -DDSO_DLFCN -DHAVE_DLFCN_H,$(LOCAL_CFLAGS_32))
+LOCAL_CFLAGS_64 := $(filter-out -DDSO_DLFCN -DHAVE_DLFCN_H,$(LOCAL_CFLAGS_64))
+endif
+
+# Debug
+# LOCAL_CFLAGS += -DCIPHER_DEBUG
+
+# Add clang here when it works on host
+# LOCAL_CLANG := true