Add 32-bit arm (armhf) support

Author: qmfrederik

.travis.yml

@@ -17,6 +17,10 @@ matrix:
       dist: trusty
       sudo: required
       env: RID=linux-arm64
+    - os: linux
+      dist: trusty
+      sudo: required
+      env: RID=linux-arm
     - os: osx
       env: RID=osx
 

CMakeLists.arm.txt

@@ -0,0 +1,6 @@
+SET(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+set(TARGET_ABI "linux-gnueabihf")
+
+SET(CMAKE_C_COMPILER   ${CMAKE_SYSTEM_PROCESSOR}-${TARGET_ABI}-gcc)
+SET(CMAKE_CXX_COMPILER ${CMAKE_SYSTEM_PROCESSOR}-${TARGET_ABI}-g++)

Dockerfile.linux-arm

@@ -0,0 +1,11 @@
+FROM debian:9
+WORKDIR /nativebinaries
+COPY . /nativebinaries/
+
+RUN dpkg --add-architecture armhf
+
+RUN apt update \
+&& apt -y install cmake pkg-config \
+   crossbuild-essential-armhf
+
+CMD ["/bin/bash", "-c", "./build.libgit2.sh"]

build.libgit2.sh

@@ -20,6 +20,10 @@ pushd libgit2/build
 
 export _BINPATH=`pwd`
 
+if [[ $RID == *arm ]]; then
+	export TOOLCHAIN_FILE=/nativebinaries/CMakeLists.arm.txt
+fi
+
 if [[ $RID == *arm64 ]]; then
 	export TOOLCHAIN_FILE=/nativebinaries/CMakeLists.arm64.txt
 fi