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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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13
src/api/java/CMakeLists.txt
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@ -48,17 +48,18 @@ target_include_directories(z3java PRIVATE
"${PROJECT_BINARY_DIR}/src/api"
${JNI_INCLUDE_DIRS}
)
# Add header padding for macOS to allow install_name_tool to modify the dylib
# On macOS, set rpath so libz3java.dylib can find libz3.dylib in the same directory,
# and add header padding to allow install_name_tool to modify the dylib.
if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
set_target_properties(z3java PROPERTIES
MACOSX_RPATH TRUE
INSTALL_RPATH "@loader_path"
BUILD_RPATH "@loader_path"
)
target_link_options(z3java PRIVATE "-Wl,-headerpad_max_install_names")
endif()
# FIXME: Should this library have SONAME and VERSION set?
# On macOS, add headerpad for install_name_tool compatibility
if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
target_link_options(z3java PRIVATE "-Wl,-headerpad_max_install_names")
endif()
# This prevents CMake from automatically defining ``z3java_EXPORTS``
set_property(TARGET z3java PROPERTY DEFINE_SYMBOL "")