depends: Support for S390X targets

depends/.gitignore

@@ -11,3 +11,4 @@ aarch64*
 powerpc*
 riscv32*
 riscv64*
+s390x*

depends/Makefile

@@ -186,7 +186,7 @@ $(host_prefix)/share/config.site: check-packages
 check-packages: check-sources
 
 clean-all: clean
-	@rm -rf $(SOURCES_PATH) x86_64* i686* mips* arm* aarch64* powerpc* riscv32* riscv64*
+	@rm -rf $(SOURCES_PATH) x86_64* i686* mips* arm* aarch64* powerpc* riscv32* riscv64* s390x*
 
 clean:
 	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD)

depends/README.md

@@ -12,13 +12,13 @@ For example:
 
     make HOST=x86_64-w64-mingw32 -j4
 
-**Bitcoin's configure script by default will ignore the depends output.** In
+**Bitcoin Core's configure script by default will ignore the depends output.** In
 order for it to pick up libraries, tools, and settings from the depends build,
 you must point it at the appropriate `--prefix` directory generated by the
 build. In the above example, a prefix dir named x86_64-w64-mingw32 will be
 created. To use it for Bitcoin:
 
-    ./configure --prefix=`pwd`/depends/x86_64-w64-mingw32
+    ./configure --prefix=$PWD/depends/x86_64-w64-mingw32
 
 Common `host-platform-triplets` for cross compilation are:
 
@@ -32,6 +32,7 @@ Common `host-platform-triplets` for cross compilation are:
 - `powerpc64le-linux-gnu` for Linux POWER 64-bit (little endian)
 - `riscv32-linux-gnu` for Linux RISC-V 32 bit
 - `riscv64-linux-gnu` for Linux RISC-V 64 bit
+- `s390x-linux-gnu` for Linux S390X
 - `armv7a-linux-android` for Android ARM 32 bit
 - `aarch64-linux-android` for Android ARM 64 bit
 - `i686-linux-android` for Android x86 32 bit
@@ -74,6 +75,10 @@ For linux RISC-V 64-bit cross compilation (there are no packages for 32-bit):
 RISC-V known issue: gcc-7.3.0 and gcc-7.3.1 result in a broken `test_bitcoin` executable (see https://github.com/bitcoin/bitcoin/pull/13543),
 this is apparently fixed in gcc-8.1.0.
 
+For linux S390X cross compilation:
+
+    sudo apt-get install g++-s390x-linux-gnu binutils-s390x-linux-gnu
+
 ### Dependency Options
 The following can be set when running make: make FOO=bar
 

depends/packages/qt.mk

@@ -131,6 +131,7 @@ $(package)_config_opts_aarch64_linux = -xplatform linux-aarch64-gnu-g++
 $(package)_config_opts_powerpc64_linux = -platform linux-g++ -xplatform bitcoin-linux-g++
 $(package)_config_opts_powerpc64le_linux = -platform linux-g++ -xplatform bitcoin-linux-g++
 $(package)_config_opts_riscv64_linux = -platform linux-g++ -xplatform bitcoin-linux-g++
+$(package)_config_opts_s390x_linux = -platform linux-g++ -xplatform bitcoin-linux-g++
 
 $(package)_config_opts_mingw32 = -no-opengl
 $(package)_config_opts_mingw32 += -no-dbus