depends: Switch from multilib to platform-specific toolchains

Author: hebasto

ci/test/00_setup_env_i686_multiprocess.sh

@@ -10,7 +10,7 @@ export HOST=i686-pc-linux-gnu
 export CONTAINER_NAME=ci_i686_multiprocess
 export CI_IMAGE_NAME_TAG="mirror.gcr.io/ubuntu:24.04"
 export CI_IMAGE_PLATFORM="linux/amd64"
-export PACKAGES="llvm clang g++-multilib"
+export PACKAGES="llvm clang g++-i686-linux-gnu binutils-i686-linux-gnu"
 export DEP_OPTS="DEBUG=1 MULTIPROCESS=1"
 export GOAL="install"
 export TEST_RUNNER_EXTRA="--v2transport"

contrib/guix/libexec/build.sh

@@ -165,18 +165,12 @@ export TZ="UTC"
 # Depends Building #
 ####################
 
-# Build the depends tree, overriding variables that assume multilib gcc
+# Build the depends tree
 make -C depends --jobs="$JOBS" HOST="$HOST" \
                                    ${V:+V=1} \
                                    ${SOURCES_PATH+SOURCES_PATH="$SOURCES_PATH"} \
                                    ${BASE_CACHE+BASE_CACHE="$BASE_CACHE"} \
-                                   ${SDK_PATH+SDK_PATH="$SDK_PATH"} \
-                                   x86_64_linux_CC=x86_64-linux-gnu-gcc \
-                                   x86_64_linux_CXX=x86_64-linux-gnu-g++ \
-                                   x86_64_linux_AR=x86_64-linux-gnu-gcc-ar \
-                                   x86_64_linux_RANLIB=x86_64-linux-gnu-gcc-ranlib \
-                                   x86_64_linux_NM=x86_64-linux-gnu-gcc-nm \
-                                   x86_64_linux_STRIP=x86_64-linux-gnu-strip
+                                   ${SDK_PATH+SDK_PATH="$SDK_PATH"}
 
 case "$HOST" in
     *darwin*)

depends/README.md

@@ -4,7 +4,7 @@ To build dependencies for the current arch+OS:
 
     make
 
-To build for another arch/OS:
+To build for another arch+OS:
 
     make HOST=host-platform-triplet
 
@@ -22,17 +22,17 @@ created. To use it during configuring Bitcoin Core:
 
 Common `host-platform-triplet`s for cross compilation are:
 
-- `i686-pc-linux-gnu` for Linux x86 32 bit
-- `x86_64-pc-linux-gnu` for Linux x86 64 bit
-- `x86_64-w64-mingw32` for Win64
+- `i686-linux-gnu` for Linux x86 32-bit
+- `x86_64-linux-gnu` for Linux x86 64-bit
+- `x86_64-w64-mingw32` for Windows
 - `x86_64-apple-darwin` for macOS
 - `arm64-apple-darwin` for ARM macOS
-- `arm-linux-gnueabihf` for Linux ARM 32 bit
-- `aarch64-linux-gnu` for Linux ARM 64 bit
-- `powerpc64-linux-gnu` for Linux POWER 64 bit (big endian)
-- `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
+- `arm-linux-gnueabihf` for Linux ARM 32-bit
+- `aarch64-linux-gnu` for Linux ARM 64-bit
+- `powerpc64-linux-gnu` for Linux POWER 64-bit (big endian)
+- `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
 
 The paths are automatically configured and no other options are needed.
@@ -62,29 +62,35 @@ For more information, see [SDK Extraction](../contrib/macdeploy/README.md#sdk-ex
 
     apt install g++-mingw-w64-x86-64-posix
 
-#### For linux (including i386, ARM) cross compilation
+#### For Linux cross compilation
 
-Common linux dependencies:
+Please note that package availability might depend on your arch+OS your are building on.
 
-    sudo apt-get install g++-multilib binutils
+For Linux x86 32-bit cross compilation:
 
-For linux ARM cross compilation:
+    sudo apt-get install g++-i686-linux-gnu binutils-i686-linux-gnu
+
+For Linux x86 64-bit cross compilation:
+
+    sudo apt-get install g++-x86-64-linux-gnu binutils-x86-64-linux-gnu
+
+For Linux ARM 32-bit cross compilation:
 
     sudo apt-get install g++-arm-linux-gnueabihf binutils-arm-linux-gnueabihf
 
-For linux AARCH64 cross compilation:
+For Linux ARM 64-bit cross compilation:
 
     sudo apt-get install g++-aarch64-linux-gnu binutils-aarch64-linux-gnu
 
-For linux POWER 64-bit cross compilation (there are no packages for 32-bit):
+For Linux POWER 64-bit cross compilation (there are no packages for 32-bit):
 
     sudo apt-get install g++-powerpc64-linux-gnu binutils-powerpc64-linux-gnu g++-powerpc64le-linux-gnu binutils-powerpc64le-linux-gnu
 
-For linux RISC-V 64-bit cross compilation (there are no packages for 32-bit):
+For Linux RISC-V 64-bit cross compilation (there are no packages for 32-bit):
 
     sudo apt-get install g++-riscv64-linux-gnu binutils-riscv64-linux-gnu
 
-For linux S390X cross compilation:
+For Linux S390X cross compilation:
 
     sudo apt-get install g++-s390x-linux-gnu binutils-s390x-linux-gnu
 

depends/hosts/linux.mk

@@ -19,27 +19,6 @@ linux_debug_CPPFLAGS=-D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC
 # https://libcxx.llvm.org/Hardening.html
 linux_debug_CPPFLAGS+=-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG
 
-ifeq (86,$(findstring 86,$(build_arch)))
-i686_linux_CC=gcc -m32
-i686_linux_CXX=g++ -m32
-i686_linux_AR=ar
-i686_linux_RANLIB=ranlib
-i686_linux_NM=nm
-i686_linux_STRIP=strip
-
-x86_64_linux_CC=gcc -m64
-x86_64_linux_CXX=g++ -m64
-x86_64_linux_AR=ar
-x86_64_linux_RANLIB=ranlib
-x86_64_linux_NM=nm
-x86_64_linux_STRIP=strip
-else
-i686_linux_CC=$(default_host_CC) -m32
-i686_linux_CXX=$(default_host_CXX) -m32
-x86_64_linux_CC=$(default_host_CC) -m64
-x86_64_linux_CXX=$(default_host_CXX) -m64
-endif
-
 linux_cmake_system_name=Linux
 # Refer to doc/dependencies.md for the minimum required kernel.
 linux_cmake_system_version=3.17.0