add riscv64 to fio/iperf3 binary build workflows (#97)

.github/workflows/build-fio.yml

@@ -2,6 +2,11 @@ name: Build fio Static Binaries
 
 on:
   workflow_dispatch:
+    inputs:
+      force:
+        description: 'Rebuild even if a release for the latest upstream version already exists (e.g. to add a new architecture)'
+        type: boolean
+        default: false
   schedule:
     # check upstream for a new fio release once a day
     - cron: '23 5 * * *'
@@ -36,8 +41,15 @@ jobs:
           # Check if this version already exists in our releases (upstream tag is
           # already prefixed, e.g. "fio-3.41", so it can be used as-is)
           if gh release view "$VERSION" --repo ${{ github.repository }} >/dev/null 2>&1; then
+            # an existing release normally skips the build, but a manual dispatch with
+            # force=true rebuilds anyway (e.g. to add a new architecture to the assets)
+            if [ "${{ inputs.force }}" = "true" ]; then
+              echo "Version $VERSION already exists but force rebuild requested"
+              echo "should-build=true" >> $GITHUB_OUTPUT
+            else
               echo "Version $VERSION already exists in releases"
               echo "should-build=false" >> $GITHUB_OUTPUT
+            fi
           else
             echo "Version $VERSION does not exist, should build"
             echo "should-build=true" >> $GITHUB_OUTPUT
@@ -65,6 +77,9 @@ jobs:
           - arch: arm
             cross: arm-linux-musleabihf
             host: arm-linux-gnueabihf
+          - arch: riscv64
+            cross: riscv64-linux-musl
+            host: riscv64-linux-gnu
 
     steps:
       - name: Create compilation script
@@ -113,8 +128,9 @@ jobs:
           # redefines struct prctl_mm_map under musl; sys/prctl.h alone is sufficient
           sed -i '/#include <linux\/prctl.h>/d' backend.c
           CC=/root/$CROSS-cross/bin/$CROSS-gcc ./configure --disable-native --build-static
-          # link against libatomic for 32-bit/ARM targets that lack native 64-bit atomics
+          # link against libatomic for 32-bit/ARM targets that lack native 64-bit atomics; -no-pie forces a
-          make EXTLIBS+=' -latomic'
+          # classic static executable on default-PIE toolchains (riscv64), where a static-PIE fails to link
+          make EXTLIBS+=' -latomic -no-pie'
 
           # verify no external shared library links
           libcheck fio
@@ -326,6 +342,7 @@ jobs:
             - `fio_x86` - i686 (32-bit)
             - `fio_aarch64` - ARM 64-bit
             - `fio_arm` - ARM 32-bit
+            - `fio_riscv64` - RISC-V 64-bit
 
             **Security Verification:**
             All binaries have been scanned by VirusTotal and verified clean.

.github/workflows/build-iperf3.yml

@@ -2,6 +2,11 @@ name: Build iperf3 Static Binaries
 
 on:
   workflow_dispatch:
+    inputs:
+      force:
+        description: 'Rebuild even if a release for the latest upstream version already exists (e.g. to add a new architecture)'
+        type: boolean
+        default: false
   schedule:
     # check upstream for a new iperf3 release once a day
     - cron: '47 5 * * *'
@@ -35,8 +40,15 @@ jobs:
 
           # Check if this version already exists in our releases
           if gh release view "iperf3-$VERSION" --repo ${{ github.repository }} >/dev/null 2>&1; then
+            # an existing release normally skips the build, but a manual dispatch with
+            # force=true rebuilds anyway (e.g. to add a new architecture to the assets)
+            if [ "${{ inputs.force }}" = "true" ]; then
+              echo "Version $VERSION already exists but force rebuild requested"
+              echo "should-build=true" >> $GITHUB_OUTPUT
+            else
               echo "Version $VERSION already exists in releases"
               echo "should-build=false" >> $GITHUB_OUTPUT
+            fi
           else
             echo "Version $VERSION does not exist, should build"
             echo "should-build=true" >> $GITHUB_OUTPUT
@@ -67,6 +79,9 @@ jobs:
           - arch: arm
             cross: arm-linux-musleabihf
             host: arm-linux-gnueabihf
+          - arch: riscv64
+            cross: riscv64-linux-musl
+            host: riscv64-linux-gnu
 
     steps:
       - name: Create compilation script
@@ -104,7 +119,9 @@ jobs:
           curl -L -4 --retry 5 --retry-delay 2 --connect-timeout 15 "https://github.com/esnet/iperf/archive/$VERSION.tar.gz" -o "iperf.tar.gz"
           tar xf iperf.tar.gz
           cd iperf-*
-          CC=/root/$CROSS-cross/bin/$CROSS-gcc ./configure --disable-shared --disable-profiling --build x86_64-pc-linux-gnu --host "$HOST" --with-openssl=no --enable-static-bin
+          # -no-pie must be set via LDFLAGS at configure time (passing it to make overrides automake's LDFLAGS and
+          # drops --static); on default-PIE toolchains (riscv64) a static-PIE iperf3 links but segfaults at runtime
+          LDFLAGS="${LDFLAGS} -no-pie" CC=/root/$CROSS-cross/bin/$CROSS-gcc ./configure --disable-shared --disable-profiling --build x86_64-pc-linux-gnu --host "$HOST" --with-openssl=no --enable-static-bin
           # remove libatomic.la so libtool links the static libatomic.a rather than
           # attempting to link libatomic.so into the static binary (breaks arm32 builds)
           rm -f /root/$CROSS-cross/$CROSS/lib/libatomic.la
@@ -349,6 +366,7 @@ jobs:
             - `iperf3_x86` - i686 (32-bit)
             - `iperf3_aarch64` - ARM 64-bit
             - `iperf3_arm` - ARM 32-bit (if available)
+            - `iperf3_riscv64` - RISC-V 64-bit
 
             ${{ steps.check-arm.outputs.arm-note }}
 

bin/README.md

@@ -7,8 +7,8 @@ repository** - they are built automatically by GitHub Actions workflows
 [build-iperf3.yml](../.github/workflows/build-iperf3.yml)) on GitHub-hosted
 runners and published as release assets on this repository:
 
-* `fio-*` releases (e.g. `fio-3.42`) - contain `fio_x64`, `fio_x86`, `fio_aarch64`, `fio_arm`
+* `fio-*` releases (e.g. `fio-3.42`) - contain `fio_x64`, `fio_x86`, `fio_aarch64`, `fio_arm`, `fio_riscv64`
-* `iperf3-*` releases (e.g. `iperf3-3.21`) - contain `iperf3_x64`, `iperf3_x86`, `iperf3_aarch64`, `iperf3_arm`
+* `iperf3-*` releases (e.g. `iperf3-3.21`) - contain `iperf3_x64`, `iperf3_x86`, `iperf3_aarch64`, `iperf3_arm`, `iperf3_riscv64`
 * `toolchains` release - musl cross-compilation toolchains mirrored from
   [musl.cc](https://musl.cc/) (which blocks GitHub Actions IP ranges); see the
   NOTICE.txt asset for licensing/source info
@@ -33,7 +33,7 @@ issue if the binaries are out of date and lacking any security-related and/or
 performance updates - the daily scheduled workflows should pick up new upstream
 releases automatically.
 
-Note: ARM compatibility is considered experimental.
+Note: ARM and RISC-V compatibility is considered experimental.
 
 ### Compile Notes (manual builds)
 
@@ -57,6 +57,10 @@ Compilation of 32-bit and ARM-compatible binaries requires additional
 environment variables to identify the proper musl toolchain and architecture to
 target for cross-compilation.
 
+The musl.cc riscv64 toolchain is default-PIE, so the scripts pass `-no-pie` to
+produce classic static executables (a static-PIE fio fails to link, and a
+static-PIE iperf3 links but segfaults at runtime).
+
 **Compiling 32-bit x86 binaries**:
 
 ```sh
@@ -74,3 +78,9 @@ docker run -t -i --rm -v `pwd`:/io --env ARCH=aarch64 --env CROSS=aarch64-linux-
 ```sh
 docker run -t -i --rm -v `pwd`:/io --env ARCH=arm --env CROSS=arm-linux-musleabihf --env HOST=arm-linux-gnueabihf phusion/holy-build-box-64:latest bash /io/cross-compile.sh
 ```
+
+**Compiling RISC-V 64-bit binaries**:
+
+```sh
+docker run -t -i --rm -v `pwd`:/io --env ARCH=riscv64 --env CROSS=riscv64-linux-musl --env HOST=riscv64-linux-gnu phusion/holy-build-box-64:latest bash /io/cross-compile.sh
+```

bin/cross-compile.sh

@@ -39,8 +39,9 @@ cd fio-fio-*
 # conflicts under musl; sys/prctl.h alone is sufficient
 sed -i '/#include <linux\/prctl.h>/d' backend.c
 CC=/root/${CROSS}-cross/bin/${CROSS}-gcc ./configure --disable-native --build-static
-# link against libatomic for 32-bit/ARM targets that lack native 64-bit atomics
+# link against libatomic for 32-bit/ARM targets that lack native 64-bit atomics; -no-pie forces a
-make EXTLIBS+=' -latomic'
+# classic static executable on default-PIE toolchains (riscv64), where a static-PIE fails to link
+make EXTLIBS+=' -latomic -no-pie'
 
 # verify no external shared library links
 libcheck fio
@@ -52,7 +53,9 @@ cd ~
 curl -L https://github.com/esnet/iperf/archive/3.21.tar.gz -o "iperf.tar.gz"
 tar xf iperf.tar.gz
 cd iperf-*
-CC=/root/${CROSS}-cross/bin/${CROSS}-gcc ./configure --disable-shared --disable-profiling --build x86_64-pc-linux-gnu --host "${HOST}" --with-openssl=no --enable-static-bin
+# -no-pie must be set via LDFLAGS at configure time (passing it to make overrides automake's LDFLAGS and
+# drops --static); on default-PIE toolchains (riscv64) a static-PIE iperf3 links but segfaults at runtime
+LDFLAGS="${LDFLAGS} -no-pie" CC=/root/${CROSS}-cross/bin/${CROSS}-gcc ./configure --disable-shared --disable-profiling --build x86_64-pc-linux-gnu --host "${HOST}" --with-openssl=no --enable-static-bin
 # remove libatomic.la so libtool links the static libatomic.a rather than
 # attempting to link libatomic.so into the static binary (breaks arm32 builds)
 rm -f "/root/${CROSS}-cross/${CROSS}/lib/libatomic.la"