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Specify and document value for environment variable for loading native library in Java bindings #5477

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Aug 13, 2021
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Specify and document value for environment variable for loading native library in Java bindings #5477

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4849b3a
limit range of environment variable for loading the native library in…
kfriedberger Aug 13, 2021
147c01a
adding documentation about environment variable for (not) loading the…
kfriedberger Aug 13, 2021
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6 changes: 6 additions & 0 deletions examples/java/README
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Original file line number Diff line number Diff line change
Expand Up @@ -12,3 +12,9 @@ On Linux and FreeBSD, we must use
LD_LIBRARY_PATH=. java -cp com.microsoft.z3.jar:. JavaExample
On macOS, the corresponding option is DYLD_LIBRARY_PATH:
DYLD_LIBRARY_PATH=. java -cp com.microsoft.z3.jar:. JavaExample

By default, Z3 Java bindings are automatically loading the required native library for Z3 from the default library path.
In certain environments, depending on the developing process, the Z3 library is not available in the given library path.
To disable the automated loading process, the user can set the environment variable "z3.skipLibraryLoad=true".
In that case, the calling application should directly load the corresponding libraries before any interaction with Z3.

2 changes: 1 addition & 1 deletion scripts/update_api.py
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Expand Up @@ -545,7 +545,7 @@ def mk_java(java_dir, package_name):
java_native.write(' public static native void setInternalErrorHandler(long ctx);\n\n')

java_native.write(' static {\n')
java_native.write(' if (null == System.getProperty("z3.skipLibraryLoad")) {\n')
java_native.write(' if (!Boolean.parseBoolean(System.getProperty("z3.skipLibraryLoad"))) {\n')
java_native.write(' try {\n')
java_native.write(' System.loadLibrary("z3java");\n')
java_native.write(' } catch (UnsatisfiedLinkError ex) {\n')
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