Add powerpc-unknown-linux-gnu support.

.github/workflows/ci.yml

@@ -504,6 +504,7 @@ jobs:
         target:
           - aarch64-unknown-linux-gnu
           - i686-unknown-linux-gnu
+          - powerpc-unknown-linux-gnu
           - powerpc64le-unknown-linux-gnu
           - riscv64gc-unknown-linux-gnu
           - s390x-unknown-linux-gnu
@@ -530,6 +531,9 @@ jobs:
           - target: i686-unknown-linux-gnu
             host_os: ubuntu-22.04
 
+          - target: powerpc-unknown-linux-gnu
+            host_os: ubuntu-22.04
+
           - target: powerpc64le-unknown-linux-gnu
             host_os: ubuntu-22.04
 

include/ring-core/target.h

@@ -40,6 +40,8 @@
 #elif defined(__MIPSEL__) && defined(__LP64__)
 #define OPENSSL_64_BIT
 #define OPENSSL_MIPS64
+#elif (defined(__PPC__) || defined(__powerpc__)) && defined(_BIG_ENDIAN)
+#define OPENSSL_32_BIT
 #elif (defined(__PPC64__) || defined(__powerpc64__)) && defined(_LITTLE_ENDIAN)
 #define OPENSSL_64_BIT
 #define OPENSSL_PPC64LE

mk/cargo.sh

@@ -21,6 +21,7 @@ rustflags_self_contained="-Clink-self-contained=yes -Clinker=rust-lld"
 qemu_aarch64="qemu-aarch64 -L /usr/aarch64-linux-gnu"
 qemu_arm="qemu-arm -L /usr/arm-linux-gnueabihf"
 qemu_mipsel="qemu-mipsel -L /usr/mipsel-linux-gnu"
+qemu_powerpc="qemu-ppc -L /usr/powerpc-linux-gnu"
 qemu_powerpc64le="qemu-ppc64le -L /usr/powerpc64le-linux-gnu"
 qemu_riscv64="qemu-riscv64 -L /usr/riscv64-linux-gnu"
 qemu_s390x="qemu-s390x -L /usr/s390x-linux-gnu"
@@ -102,6 +103,13 @@ case $target in
     export CARGO_TARGET_MIPSEL_UNKNOWN_LINUX_GNU_LINKER=mipsel-linux-gnu-gcc
     export CARGO_TARGET_MIPSEL_UNKNOWN_LINUX_GNU_RUNNER="$qemu_mipsel"
     ;;
+  powerpc-unknown-linux-gnu)
+    export CC_powerpc_unknown_linux_gnu=clang-$llvm_version
+    export AR_powerpc_unknown_linux_gnu=llvm-ar-$llvm_version
+    export CFLAGS_powerpc_unknown_linux_gnu="--sysroot=/usr/powerpc-linux-gnu"
+    export CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_LINKER=powerpc-linux-gnu-gcc
+    export CARGO_TARGET_POWERPC_UNKNOWN_LINUX_GNU_RUNNER="$qemu_powerpc"
+    ;;
   powerpc64le-unknown-linux-gnu)
     export CC_powerpc64le_unknown_linux_gnu=clang-$llvm_version
     export AR_powerpc64le_unknown_linux_gnu=llvm-ar-$llvm_version

mk/install-build-tools.sh

@@ -91,6 +91,13 @@ case $target in
     libc6-dev-mipsel-cross \
     qemu-user
   ;;
+--target=powerpc-unknown-linux-gnu)
+  use_clang=1
+  install_packages \
+    gcc-powerpc-linux-gnu \
+    libc6-dev-powerpc-cross \
+    qemu-user
+  ;;
 --target=powerpc64le-unknown-linux-gnu)
   use_clang=1
   install_packages \

src/lib.rs

@@ -114,10 +114,3 @@ mod sealed {
     // ```
     pub trait Sealed {}
 }
-
-// XXX: 64-bit big endian is tested; 32-bit is not.
-// TODO: Add 32-bit big endian test coverage to CI.
-const _ENDIAN_TESTING: () = assert!(cfg!(any(
-    target_endian = "little",
-    target_pointer_width = "64"
-)));