mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-10-01 14:58:14 +00:00
Henrik RydgårdandClaude Opus 5
ba06b454f3
The GL stub generation in b.sh and setup-loongarch64-cross.sh harvested symbols from hardcoded /usr/lib/x86_64-linux-gnu paths. On any other host those simply don't exist, and neither script treats that as an error - so the stub silently fell back to the handful of GLX symbols listed inline, which isn't enough for GLEW's static archive to link against. Ask the host compiler for its multiarch triplet instead. Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
78 lines
3.2 KiB
Bash
Executable File
78 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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# Sets up the loongarch64 cross-compilation environment.
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# Run once with sudo. After this, ./b.sh --loongarch64 works on a fresh checkout.
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set -e
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SYSROOT=/usr/loongarch64-linux-gnu
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CROSS_GCC=loongarch64-linux-gnu-gcc-14
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if ! command -v $CROSS_GCC &>/dev/null; then
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echo "Error: $CROSS_GCC not found. Install it first:"
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echo " sudo apt install gcc-14-loongarch64-linux-gnu g++-14-loongarch64-linux-gnu binutils-loongarch64-linux-gnu"
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exit 1
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fi
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if [ "$(id -u)" -ne 0 ]; then
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echo "This script must be run with sudo."
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exit 1
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fi
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# ── OpenGL headers ───────────────────────────────────────────────────────────
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# GL headers are platform-independent C headers; copy from the host.
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echo "Installing GL headers into sysroot..."
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mkdir -p $SYSROOT/include/GL
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for h in gl.h glext.h glcorearb.h glu.h; do
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[ -f /usr/include/GL/$h ] && cp /usr/include/GL/$h $SYSROOT/include/GL/ && echo " $h"
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done
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# ── GL stub library ──────────────────────────────────────────────────────────
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# Generate a loongarch64 libGL.so that exports all symbols from the host
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# libGL so that GLEW's static archive can be linked via PLT entries (a direct
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# B26 branch to address 0 would overflow on LoongArch).
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echo "Generating libGL.so stub..."
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HOST_MULTIARCH=$(gcc -print-multiarch 2>/dev/null || dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null)
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HOST_GL=""
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for candidate in \
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/usr/lib/$HOST_MULTIARCH/libGL.so.1 \
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/usr/lib/$HOST_MULTIARCH/libGL.so \
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/usr/lib/libGL.so.1 ; do
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[ -f "$candidate" ] && HOST_GL="$candidate" && break
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done
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STUB_C=$(mktemp /tmp/gl_stub_XXXXXX.c)
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echo "/* Loongarch64 GL/GLX stub - for cross-compilation only */" > "$STUB_C"
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echo "void __loongarch64_gl_placeholder(void) {}" >> "$STUB_C"
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if [ -n "$HOST_GL" ]; then
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nm -D "$HOST_GL" 2>/dev/null | awk '/^[0-9a-f]+ T /{ print "void "$3"(void){}" }' >> "$STUB_C"
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echo " Extracted symbols from $HOST_GL"
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fi
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# Always include the minimal set GLEW needs (in case host GL wasn't found)
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for sym in glXGetProcAddressARB glXGetClientString glXQueryVersion \
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glBindTexture glGetString glGetIntegerv glGetError; do
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grep -q "void ${sym}(" "$STUB_C" || echo "void ${sym}(void){}" >> "$STUB_C"
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done
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$CROSS_GCC -shared -fPIC -Wno-implicit-function-declaration \
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-o $SYSROOT/lib/libGL.so "$STUB_C"
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rm "$STUB_C"
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echo " Installed to $SYSROOT/lib/libGL.so"
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# ── Dynamic linker symlink ───────────────────────────────────────────────────
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# Without this, binfmt_misc can't find the loongarch64 dynamic linker.
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LD_LINUX=$SYSROOT/lib/ld-linux-loongarch-lp64d.so.1
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if [ -f "$LD_LINUX" ]; then
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mkdir -p /lib64
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ln -sf "$LD_LINUX" /lib64/ld-linux-loongarch-lp64d.so.1
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echo "Created /lib64/ld-linux-loongarch-lp64d.so.1 -> $LD_LINUX"
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fi
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echo ""
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echo "Setup complete."
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echo "Build: ./b.sh --loongarch64"
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echo "Run: qemu-loongarch64-static -L $SYSROOT <binary>"
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echo " (after setup the /lib64 symlink lets you run loongarch64 binaries directly)"
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