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CI: use evergreen runners; update actions.
GitHub will continue to merrily deprecate and remove old runner environments, as is their prerogative. However, the simplest way to produce a library with a low minimum glibc version requirement is to build in an environment having an old glibc. Not only does Ubuntu 18.04 have a fairly old glibc (v2.27), but the symbol versions our library links against require only glibc v2.7 (on x86_64; somewhat higher for some of the other architectures). Having previously fixed cross-compilation compatibility with GCC 8, we are no longer able to build with GCC 7-based compilers. Thankfully, Ubuntu did package GCC 8 on 18.04; it's just not the default.
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‎.github/workflows/build.yml‎

Lines changed: 39 additions & 25 deletions
Original file line numberDiff line numberDiff line change
@@ -6,23 +6,32 @@ on:
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jobs:
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natives-linux-windows:
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name: Linux (x86/ARM/PPC) and Windows native library compilation
9-
runs-on: ubuntu-18.04
9+
runs-on: ubuntu-latest
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container:
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image: ubuntu:18.04
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env:
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GCC: gcc-8
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defaults:
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run:
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working-directory: src/main/c
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steps:
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- name: Checkout the target branch
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uses: actions/checkout@v2
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uses: actions/checkout@v3
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- name: Setup Java
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uses: actions/setup-java@v1
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uses: actions/setup-java@v3
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with:
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distribution: temurin
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java-version: 8
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# Don't need the dependency cache here (or in any of the other native
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# library compilation steps), because we're not invoking the Java
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# compiler in this step. We only need the JDK for its headers.
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- name: Install build prerequisites
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run: |
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sudo apt update
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sudo make crosstools
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apt-get update
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apt-get --assume-yes install make $GCC
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make crosstools
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- name: Build the Linux and Windows native libraries
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run: |
@@ -33,36 +42,37 @@ jobs:
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# exactly to the directories inside `src/main/c/resources/native`. That
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# way, the Java build job can pull down all artifacts and unpack them
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# into that directory to overwrite the versions in-repo. This is sadly
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# necessary because the actions/download-artifact@v2 action flattens
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# necessary because the actions/download-artifact@v3 action flattens
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# paths inside artifacts. If it retained full relative paths, we could
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# put Linux and Windows natives inside the same artifact, and we could be
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# flexible with the artifact names. But it doesn't, so we can't, and we
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# can't.
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- name: Upload Linux native libraries
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uses: actions/upload-artifact@v2
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uses: actions/upload-artifact@v3
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with:
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name: linux
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path: src/main/c/resources/native/linux
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- name: Upload Windows native libraries
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uses: actions/upload-artifact@v2
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uses: actions/upload-artifact@v3
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with:
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name: windows
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path: src/main/c/resources/native/windows
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natives-macos:
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name: macOS native library compilation
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runs-on: macos-10.15
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runs-on: macos-latest
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defaults:
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run:
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working-directory: src/main/c
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steps:
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- name: Checkout the target branch
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uses: actions/checkout@v2
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uses: actions/checkout@v3
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- name: Setup Java
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uses: actions/setup-java@v1
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uses: actions/setup-java@v3
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with:
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distribution: temurin
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java-version: 8
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- name: Build the macOS native libraries
@@ -71,32 +81,34 @@ jobs:
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make osx
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- name: Upload macOS native libraries
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uses: actions/upload-artifact@v2
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uses: actions/upload-artifact@v3
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with:
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name: osx
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path: src/main/c/resources/native/osx/libNRJavaSerial.jnilib
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natives-freebsd:
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name: FreeBSD native library compilation
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runs-on: ubuntu-18.04
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runs-on: ubuntu-latest
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container:
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image: empterdose/freebsd-cross-build:9.3
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env:
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JAVA_HOME: /usr/lib/jvm/default-jvm
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defaults:
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run:
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working-directory: src/main/c
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steps:
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- name: Checkout the target branch
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uses: actions/checkout@v2
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uses: actions/checkout@v3
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- name: Setup Java
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uses: actions/setup-java@v3
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with:
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distribution: temurin
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java-version: 8
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- name: Fake the FreeBSD Java headers
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# This feels extremely dirty, but the only native header we care about
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# is `jni_md.h`, and it is exactly identical between Linux and FreeBSD
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# (at least in OpenJDK 8).
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run: |
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apk add openjdk8
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ln -s $JAVA_HOME/include/linux $JAVA_HOME/include/freebsd
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- name: Build the FreeBSD native libraries
@@ -106,14 +118,14 @@ jobs:
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settarget x86_64-freebsd9 make freebsd64
107119
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- name: Upload FreeBSD native libraries
109-
uses: actions/upload-artifact@v2
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uses: actions/upload-artifact@v3
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with:
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name: freebsd
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path: src/main/c/resources/native/freebsd
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java:
115127
name: Java compilation
116-
runs-on: ubuntu-18.04
128+
runs-on: ubuntu-latest
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needs:
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- natives-linux-windows
@@ -126,18 +138,20 @@ jobs:
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# don't regress formatting when compared with the master branch, we need
127139
# to have a local copy of the master branch for comparison.
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- name: Checkout the master branch
129-
uses: actions/checkout@v2
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uses: actions/checkout@v3
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with:
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ref: master
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- name: Checkout the target branch
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uses: actions/checkout@v2
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uses: actions/checkout@v3
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- name: Setup Java
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uses: actions/setup-java@v1
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uses: actions/setup-java@v3
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with:
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distribution: temurin
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java-version: 8
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cache: gradle
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- name: Download native libraries
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uses: actions/download-artifact@v2
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uses: actions/download-artifact@v3
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with:
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path: src/main/c/resources/native
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@@ -146,9 +160,9 @@ jobs:
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- name: Determine commit hash for artifact filename
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id: vars
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run: echo "::set-output name=short-rev::$(git rev-parse --short HEAD)"
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run: echo "short-rev=$(git rev-parse --short HEAD)" >>$GITHUB_OUTPUT
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- name: Upload build artifacts
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uses: actions/upload-artifact@v2
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uses: actions/upload-artifact@v3
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with:
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name: nrjavaserial-${{steps.vars.outputs.short-rev}}
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path: build/libs/*.jar

‎src/main/c/Makefile‎

Lines changed: 25 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -58,6 +58,14 @@ include JAVA_HOME.mk
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include platform.mk
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# Most of the time, GCC is called `gcc` and is installed from a `gcc` package.
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# However, sometimes a distribution packages multiple versions of GCC. In this
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# case, both the binary and package names of non-default versions are suffixed
64+
# (e.g., `gcc-8`). We can't use the standard CC variable to adapt to this,
65+
# because each target already overrides that variable with the name of the
66+
# appropriate cross compiler.
67+
GCC ?= gcc
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6169
# In all cases, we want to include the system JNI headers, our own headers,
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# crank the optimization level, and compile position-independent code so that
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# it will work as a library (dlopen(3) et al. can load it into any memory).
@@ -87,13 +95,13 @@ all:
8795
$(error $(NO_TARGET_PLATFORM_SPECIFIED))
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crosstools:
90-
apt install --install-recommends \
91-
gcc-i686-linux-gnu \
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gcc-arm-linux-gnueabi \
93-
gcc-arm-linux-gnueabihf \
94-
gcc-aarch64-linux-gnu \
98+
apt-get --assume-yes install \
99+
$(GCC)-i686-linux-gnu \
100+
$(GCC)-arm-linux-gnueabi \
101+
$(GCC)-arm-linux-gnueabihf \
102+
$(GCC)-aarch64-linux-gnu \
95103
gcc-mingw-w64 \
96-
gcc-powerpc-linux-gnu
104+
$(GCC)-powerpc-linux-gnu
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# Does not include Android, because Android toolchains are large, not commonly
99107
# available, and the resulting library is not typically desired.
@@ -108,14 +116,15 @@ LINUX_CFLAGS += -U_FORTIFY_SOURCE
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endif
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# Requires gcc-i686-linux-gnu.
111-
linux32: export CC := i686-linux-gnu-gcc
119+
linux32: export CC := i686-linux-gnu-$(GCC)
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linux32: export CFLAGS += $(LINUX_CFLAGS) -m32
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linux32: export LDFLAGS += -m32
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linux32: export platform := linux/x86_32
115123
linux32:
116124
$(MAKE) -f natives.mk
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# Requires gcc.
127+
linux64: export CC := $(GCC)
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linux64: export CFLAGS += $(LINUX_CFLAGS) -m64
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linux64: export platform := linux/x86_64
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linux64:
@@ -127,7 +136,7 @@ arm: arm32v5 \
127136
arm32v8 arm32v8HF arm64v8
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# Requires gcc-arm-linux-gnueabi.
130-
arm32v5: export CC := arm-linux-gnueabi-gcc
139+
arm32v5: export CC := arm-linux-gnueabi-$(GCC)
131140
arm32v5: export CFLAGS += $(LINUX_CFLAGS) -march=armv5t
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arm32v5: export LDFLAGS += -march=armv5t
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arm32v5: export platform := linux/ARM_32
@@ -136,7 +145,7 @@ arm32v5:
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$(MAKE) -f natives.mk
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# Requires gcc-arm-linux-gnueabi.
139-
arm32v6: export CC := arm-linux-gnueabi-gcc
148+
arm32v6: export CC := arm-linux-gnueabi-$(GCC)
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arm32v6: export CFLAGS += $(LINUX_CFLAGS) -march=armv6
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arm32v6: export LDFLAGS += -march=armv6
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arm32v6: export platform := linux/ARM_32
@@ -145,7 +154,7 @@ arm32v6:
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$(MAKE) -f natives.mk
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# Requires gcc-arm-linux-gnueabihf.
148-
arm32v6HF: export CC := arm-linux-gnueabihf-gcc
157+
arm32v6HF: export CC := arm-linux-gnueabihf-$(GCC)
149158
arm32v6HF: export CFLAGS += $(LINUX_CFLAGS) -march=armv6+fp -marm
150159
arm32v6HF: export LDFLAGS += -march=armv6+fp -marm
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arm32v6HF: export platform := linux/ARM_32
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154163
$(MAKE) -f natives.mk
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# Requires gcc-arm-linux-gnueabi.
157-
arm32v7: export CC := arm-linux-gnueabi-gcc
166+
arm32v7: export CC := arm-linux-gnueabi-$(GCC)
158167
arm32v7: export CFLAGS += $(LINUX_CFLAGS) -march=armv7-a
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arm32v7: export LDFLAGS += -march=armv7-a
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arm32v7: export platform := linux/ARM_32
@@ -163,7 +172,7 @@ arm32v7:
163172
$(MAKE) -f natives.mk
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165174
# Requires gcc-arm-linux-gnueabihf.
166-
arm32v7HF: export CC := arm-linux-gnueabihf-gcc
175+
arm32v7HF: export CC := arm-linux-gnueabihf-$(GCC)
167176
arm32v7HF: export CFLAGS += $(LINUX_CFLAGS) -march=armv7-a+fp
168177
arm32v7HF: export LDFLAGS += -march=armv7-a+fp
169178
arm32v7HF: export platform := linux/ARM_32
@@ -172,7 +181,7 @@ arm32v7HF:
172181
$(MAKE) -f natives.mk
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174183
# Requires gcc-arm-linux-gnueabi.
175-
arm32v8: export CC := arm-linux-gnueabi-gcc
184+
arm32v8: export CC := arm-linux-gnueabi-$(GCC)
176185
arm32v8: export CFLAGS += $(LINUX_CFLAGS) -march=armv8-a
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arm32v8: export LDFLAGS += -march=armv8-a
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arm32v8: export platform := linux/ARM_32
@@ -181,7 +190,7 @@ arm32v8:
181190
$(MAKE) -f natives.mk
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183192
# Requires gcc-arm-linux-gnueabihf.
184-
arm32v8HF: export CC := arm-linux-gnueabihf-gcc
193+
arm32v8HF: export CC := arm-linux-gnueabihf-$(GCC)
185194
arm32v8HF: export CFLAGS += $(LINUX_CFLAGS) -march=armv8-a -mfpu=neon-fp-armv8
186195
arm32v8HF: export LDFLAGS += -march=armv8-a -mfpu=neon-fp-armv8
187196
arm32v8HF: export platform := linux/ARM_32
@@ -190,7 +199,7 @@ arm32v8HF:
190199
$(MAKE) -f natives.mk
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192201
# Requires gcc-aarch64-linux-gnu.
193-
arm64v8: export CC := aarch64-linux-gnu-gcc
202+
arm64v8: export CC := aarch64-linux-gnu-$(GCC)
194203
arm64v8: export CFLAGS += $(LINUX_CFLAGS) -march=armv8-a+fp
195204
arm64v8: export LDFLAGS += -march=armv8-a+fp
196205
arm64v8: export platform := linux/ARM_64
@@ -208,7 +217,7 @@ android:
208217
$(MAKE) -f natives.mk
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210219
# Requires gcc-powerpc-linux-gnu.
211-
ppc: export CC := powerpc-linux-gnu-gcc
220+
ppc: export CC := powerpc-linux-gnu-$(GCC)
212221
ppc: export CFLAGS += $(LINUX_CFLAGS)
213222
ppc: export platform := linux/PPC
214223
ppc:

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