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Fix Java UnsatisfiedLinkError on macOS (#7640) (#9027)

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On macOS, libz3java.dylib was built without an rpath to find libz3.dylib
in the same directory. When Java loaded the JNI library, the dynamic
linker could not resolve the libz3 dependency, causing
UnsatisfiedLinkError.

Three fixes:
- mk_util.py: add -Wl,-rpath,@loader_path to the macOS JNI link command
- CMakeLists.txt: set MACOSX_RPATH, BUILD_RPATH, INSTALL_RPATH for
z3java target; remove duplicate headerpad block
- update_api.py: improve Native.java error message to show the root
cause from both load attempts instead of only the fallback error

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Lev Nachmanson 2026-06-08 19:35:04 -07:00 • committed by GitHub
parent 0cc04b53eb
commit 2ed4e90c75
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4 changed files with 59 additions and 7 deletions
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11
scripts/update_api.py
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@ -631,7 +631,16 @@ def mk_java(java_src, java_dir, package_name):
java_native.write(' try {\n')
java_native.write(' System.loadLibrary("z3java");\n')
java_native.write(' } catch (UnsatisfiedLinkError ex) {\n')
java_native.write(' System.loadLibrary("libz3java");\n')
java_native.write(' try {\n')
java_native.write(' System.loadLibrary("libz3java");\n')
java_native.write(' } catch (UnsatisfiedLinkError ex2) {\n')
java_native.write(' throw new UnsatisfiedLinkError(\n')
java_native.write(' "Failed to load z3java native library. "\n')
java_native.write(' + "Tried z3java: " + ex.getMessage() + "; "\n')
java_native.write(' + "Tried libz3java: " + ex2.getMessage() + ". "\n')
java_native.write(' + "Make sure both the JNI library and libz3 are in java.library.path "\n')
java_native.write(' + "or set DYLD_LIBRARY_PATH (macOS) / LD_LIBRARY_PATH (Linux).");\n')
java_native.write(' }\n')
java_native.write(' }\n')
java_native.write(' }\n')
java_native.write(' }\n')