GrammaticalFramework/gf-core

Java API (Windows) - No Main entry point in jpgf.jar

UserBoi1 opened this issue · 6 comments

UserBoi1 commented 
"C:\Program Files\Java\jdk1.8.0_261\bin\java.exe" -Dfile.encoding=windows-1252 -jar "C:\Users\Glen\Documents\Grammatical Framework (GF)\gf-3.11-windows\tmp-dist\java\jpgf.jar"
no main manifest attribute, in C:\Users\Glen\Documents\Grammatical Framework (GF)\gf-3.11-windows\tmp-dist\java\jpgf.jar

Process finished with exit code 1

I am using IntelliJ with the jfpg.jar added as a dependency to my project.

It's not just the MANIFEST.MF missing a mention of the entry point. I have searched through all the classes in jpgf.jar and none of them has a static void main(String[] args) in them.

I don't really know much about JARs, but from what I can google, it seems it has to have such an entry point. Is jpgf.jar a kind of non-executable JAR? What is it that I'm missing here?

Any help appreciated.

krangelov commented
krangelov commented
UserBoi1 commented

Hi Krasimir,

Thank you for your response. As a result, I applied -Djava.library.path=C:\Users\Glen\Documents\GrammaticalFramework\java and it got past the error!

Unfortunately, I am now getting a different error:

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\Glen\Documents\GrammaticalFramework\java\jpgf.dll: Can't find dependent libraries
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1934)
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1850)
	at java.lang.Runtime.loadLibrary0(Runtime.java:871)
	at java.lang.System.loadLibrary(System.java:1122)
	at org.grammaticalframework.pgf.PGF.<clinit>(PGF.java:88)
	at Game.main(Game.java:20)

Process finished with exit code 1

I used dependency walker to find the DLLs it depends on:

  • C:\Users\Glen\Documents\GrammaticalFramework\c\libpgf-0.dll
  • C:\Users\Glen\Documents\GrammaticalFramework\c\libgu-0.dll
  • C:\Windows\System32\Kernel32.dll
  • C:\Windows\System32\msys-2.0.dll

I copied the two GF ones into the java folder and that seemed to make dependency walker happy.
Kernel32 is fine.
But it said msys2 was not fine.
I have it on my machine, but under C:\msys64. I didn't know if it was a risky move to install it to System32 so I just copied the msys-2.0.dll in. Made no difference. Dependency walker still unhappy. Code still produces the same mysterious error. So I copied msys-2.0.dll into my C:\Users\Glen\Documents\GrammaticalFramework\java, seeing as that worked for the GF ones. Made no difference.

Any advice?

Many thanks,
Glen

krangelov commented
UserBoi1 commented

I downloaded the GF windows binaries from here:
https://github.com/GrammaticalFramework/gf-core/releases/tag/3.11

I am looking into how I would compile it myself instead. I've cloned the GitHub repo and I'm looking in gf-core/src/runtime/java. The INSTALL file tells me I need to do C first. The INSTALL file for C says:

For Windows users
-----------------

- Install MinGW: http://www.mingw.org/. From the installer you need
  to select at least the following packages:
     - Mingw-developer-toolkit
     - Mingw-base
     - Msys-base
  After the installation, don't forget to fix the fstab file. See here:
     http://www.mingw.org/wiki/Getting_Started

- From the MSYS shell (c:/MinGW/msys/1.0/msys.bat) go to the directory
  which contains the INSTALL file and do:

  $ autoreconf -i
  $ ./configure
  $ make
  $ make install

  The compiled binaries should be now in c:/MinGW/msys/1.0/local/bin.

This is quite confusing for a few reasons. http://www.mingw.org/ is no longer a valid link. A quick Google reveals that it has been succeeded by a project called https://www.mingw-w64.org/.
And it talks about both Mingw and Msys. You mentioned avoiding compiling with Msys so should I disregard these instructions?

krangelov commented