Fix libjson parallel build race condition#55
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laijx03 merged 1 commit intoopen64-compiler:developfrom Mar 3, 2026
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Force serial build (-j1) for the libjson CMake sub-build and add '+' prefix to properly propagate the jobserver. The libjson CMake-based build has race conditions under parallel make that cause intermittent link failures. Forcing -j1 for this small sub-build is a minimal fix with negligible impact on overall build time. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
-j1) for the libjson CMake sub-build and add+prefix for jobserver propagationMotivation
The libjson target invokes CMake internally, which has race conditions with GNU Make's jobserver under parallel builds (
make -j8). This causes intermittent link failures during the libjson build step.Forcing
-j1for this small sub-build eliminates the race with negligible impact on overall build time. The+prefix ensures proper jobserver propagation to the recursive make call.Changes
Makefile.in: Change$(MAKE) -C $(NATIVE_BUILD_DIR)/libjsonto+$(MAKE) -j1 -C $(NATIVE_BUILD_DIR)/libjsonTest plan
make -j8 buildcompletes without intermittent libjson failuresmake -j1 buildstill works (no regression for serial builds)🤖 Generated with Claude Code