Current cross-compilation configurations require adding the whole lot of configure options to make it find the dependencies: freetype and X11 libs are the only problematic dependencies. We should be able to specify just the `--with-sysroot`, and get everything else autodetected.
After this patch, doing `sh ./configure --openjdk-target=powerpc64le-linux-gnu --with-sysroot=/chroots/ppc64el`, where chroot is `debootstrap`-ed chroot as per our build docs, is enough to get everything configured. See the GH Actions definition to see what options are not needed anymore. Some explanations: - `*-gnuabi64` is needed for `mips64el` - `*-gnueabihf` is needed for `armhf` - `$OPENJDK_TARGET_CPU_AUTOCONF-linux-gnu` is needed for `powerpc*`, because OpenJDK build rewrites `VAR_CPU` to `ppc`, leading to mismatch. Additional testing: - [x] Configure with target `x86_64-linux-gnu` - [x] Configure with cross-target `i686-linux-gnu` - [x] Configure with cross-target `alpha-linux-gnu` - [x] Configure with cross-target `aarch64-linux-gnu` - [x] Configure with cross-target `arm-linux-gnueabihf` - [x] Configure with cross-target `arm-linux-gnueabi` - [x] Configure with cross-target `mipsel-linux-gnu` - [x] Configure with cross-target `mips64el-linux-gnuabi64` - [x] Configure with cross-target `powerpc-linux-gnu` - [x] Configure with cross-target `powerpc64-linux-gnu` - [x] Configure with cross-target `powerpc64le-linux-gnu` - [x] Configure with cross-target `m68k-linux-gnu` - [x] Configure with cross-target `sh4-linux-gnu` - [ ] Build with target `x86_64-linux-gnu` - [x] Build with cross-target `i686-linux-gnu` - [ ] Build with cross-target `alpha-linux-gnu` - [ ] Build with cross-target `aarch64-linux-gnu` - [ ] Build with cross-target `arm-linux-gnueabihf` - [ ] Build with cross-target `arm-linux-gnueabi` - [ ] Build with cross-target `mipsel-linux-gnu` - [ ] Build with cross-target `mips64el-linux-gnuabi64` - [ ] Build with cross-target `powerpc-linux-gnu` - [ ] Build with cross-target `powerpc64-linux-gnu` - [ ] Build with cross-target `powerpc64le-linux-gnu` - [ ] Build with cross-target `m68k-linux-gnu` - [ ] Build with cross-target `sh4-linux-gnu` ------------- Commit messages: - 8257913: Enable cross-compilation with only sysroot specified Changes: https://git.openjdk.java.net/jdk/pull/2833/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2833&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8257913 Stats: 32 lines in 4 files changed: 28 ins; 4 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/2833.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/2833/head:pull/2833 PR: https://git.openjdk.java.net/jdk/pull/2833
