Error implementing openblas.LAPACKE

[hewitta]

I am receiving an error:
java.lang.UnsatisfiedLinkError: No implementation found for int org.bytedeco.openblas.global.openblas.LAPACKE_dpotrf(int, byte, int, java.nio.DoubleBuffer, int) (tried Java_org_bytedeco_openblas_global_openblas_LAPACKE_1dpotrf and Java_org_bytedeco_openblas_global_openblas_LAPACKE_1dpotrf__IBILjava_nio_DoubleBuffer_2I)
at org.bytedeco.openblas.global.openblas.LAPACKE_dpotrf(Native Method)
at smile.math.blas.openblas.OpenBLAS.potrf(OpenBLAS.java:849)

but in openblas.class from v. 0.3.10-1.5.4, line 17447 I have:
public static native int LAPACKE_dpotrf(int var0, @cast({"char"}) byte var1, int var2, DoubleBuffer var3, int var4);

This should be the method called, correct? Any recommendations on why this error is occurring and how I might fix it?

[saudet]

Please try again with version 0.3.19-1.5.7

[hewitta]

Resulted in same error:
java.lang.UnsatisfiedLinkError: No implementation found for int org.bytedeco.openblas.global.openblas.LAPACKE_dpotrf(int, byte, int, java.nio.DoubleBuffer, int)

In this case I think the method that should have been called is on line 17448:
public static native int LAPACKE_dpotrf(int var0, @cast({"char"}) byte var1, int var2, DoubleBuffer var3, int var4);

[saudet]

Please set the "org.bytedeco.javacpp.logger.debug" system property to "true" to get more messages on the console.

[hewitta]

The log prior to the error reads:

2022-02-15 11:24:06.783 W/System.err: SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
2022-02-15 11:24:06.783 W/System.err: SLF4J: Defaulting to no-operation (NOP) logger implementation
2022-02-15 11:24:06.783 W/System.err: SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
2022-02-15 11:24:07.274 W/System.err: Debug: Loading class org.bytedeco.javacpp.presets.javacpp
2022-02-15 11:24:07.274 W/System.err: Debug: Loading class org.bytedeco.javacpp.Loader
2022-02-15 11:24:07.279 W/System.err: Debug: Loading library jnijavacpp
2022-02-15 11:24:07.282 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.282 W/linker: Warning: unable to normalize "lib/" (ignoring)
2022-02-15 11:24:07.282 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.283 W/linker: Warning: unable to normalize "lib/" (ignoring)
2022-02-15 11:24:07.290 W/System.err: Debug: Loading class org.bytedeco.javacpp.presets.javacpp
2022-02-15 11:24:07.291 W/System.err: Debug: Loading class org.bytedeco.javacpp.Pointer
2022-02-15 11:24:07.294 W/System.err: Warning: Version of org.bytedeco:openblas could not be found.
2022-02-15 11:24:07.304 W/System.err: Debug: Loading class org.bytedeco.javacpp.presets.javacpp
2022-02-15 11:24:07.304 W/System.err: Debug: Loading class org.bytedeco.openblas.global.openblas_nolapack
2022-02-15 11:24:07.317 W/System.err: Debug: Loading class org.bytedeco.javacpp.presets.javacpp
2022-02-15 11:24:07.317 W/System.err: Debug: Loading class org.bytedeco.openblas.global.openblas_nolapack
2022-02-15 11:24:07.324 W/System.err: Debug: Loading library
2022-02-15 11:24:07.325 W/System.err: Debug: Failed to load for : java.lang.UnsatisfiedLinkError: dlopen failed: library "lib.so" not found
2022-02-15 11:24:07.338 W/System.err: Debug: Loading library openblas
2022-02-15 11:24:07.365 W/System.err: Debug: Loading library jniopenblas_nolapack
2022-02-15 11:24:07.384 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.384 W/linker: Warning: unable to normalize "lib/" (ignoring)
2022-02-15 11:24:07.384 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.384 W/linker: Warning: unable to normalize "lib/" (ignoring)
2022-02-15 11:24:07.421 W/System.err: Debug: Loading class org.bytedeco.openblas.global.openblas
2022-02-15 11:24:07.427 W/System.err: Debug: Loading library jniopenblas
2022-02-15 11:24:07.431 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.431 W/linker: Warning: unable to normalize "lib/" (ignoring)
2022-02-15 11:24:07.431 E/linker: normalize_path - invalid input: "lib/", the input path should be absolute
2022-02-15 11:24:07.431 W/linker: Warning: unable to normalize "lib/" (ignoring)

[saudet]

You're on Android, that doesn't have a Fortran compiler, see pull #405.

[saudet]

It looks like OpenBLAS no longer needs a Fortran compiler to build LAPACK, see pull OpenMathLib/OpenBLAS#3539.
Could you give that a try and open a pull request with the required changes?

[hewitta]

Thank you for notifying, but I've already began working towards another solution for the code

[saudet]

FYI, I've upgraded the presets for OpenBLAS 0.3.21 (see commit 7d9084f), which no longer requires a Fortran compiler to build LAPACK, so it's now available for all platforms, including Android, iOS, and Mac on ARM.