Using arm64 cross compiler when on native arm64 #1080
Description
Version
3.4.0 (snapshot)
Platform
Linux arm64
JDK
openjdk version "21.0.8" 2025-07-15
Module
LWJGL core
Bug description
When running on arm64 and building for the native architecture, config/linux/build.xml prefers to use aarch64-linux-gnu-gcc over gcc.
I figured it's due to it only choosing gcc when on x64 or x86.
This change in config/linux/build.xml fixes it, but it's probably a workaround.
- <condition property="gcc.prefix" value="" else="${linux.triplet}-">
- <isset property="build.arch.x64|x86"/>
- </condition>
+ <property name="gcc.prefix" value=""/>
To reproduce get a arm64 system, clone the repo and run ant.
output of gcc -v below, showing it is aarch64.
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/aarch64-redhat-linux/15/lto-wrapper
Target: aarch64-redhat-linux
Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,m2,cobol,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-gcc-major-version-only --enable-libstdcxx-backtrace --with-libstdcxx-zoneinfo=/usr/share/zoneinfo --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --with-isl=/builddir/build/BUILD/gcc-15.1.1-build/gcc-15.1.1-20250521/obj-aarch64-redhat-linux/isl-install --enable-gnu-indirect-function --build=aarch64-redhat-linux --with-build-config=bootstrap-lto --enable-link-serialization=1
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.1.1 20250521 (Red Hat 15.1.1-2) (GCC)
Running asahi linux 6.14.8-400.asahi.fc42.aarch64+16k.
Stacktrace or crash log output
Buildfile: /home/sun3k/Builds/lwjgl3/build.xml
init:
check-dependencies:
-compile-generator:
compile-templates:
generate:
compile:
compile-tests:
compile-native:
compile-native-platform:
[exec] bash: line 1: aarch64-linux-gnu-gcc: command not found
BUILD FAILED
/home/sun3k/Builds/lwjgl3/build.xml:576: The following error occurred while executing this line:
/home/sun3k/Builds/lwjgl3/config/linux/build.xml:162: exec returned: 1
Total time: 0 seconds
Clearly using the cross toolchain, not the standard one.