Develop Reference

Build Flatpak from Java application

I'm currently working on DXVKoTool, a Compose application built with Kotlin.
As I want it to be easily available on the Steam Deck, I try to build a Flatpak off it.
Basically what I wanted to do is packaging it (with jpackage) and use the built binaries when building the Flatpak.
My building process would look like this:
./gradlew packageAppImage
flatpak-builder build/release/main/flatpak dev.datlag.DXVKoTool.yml --force-clean
The packageAppImage command produces an output like this:
{project-dir}
|-build
|-release
|-main
|-app
|-DXVKoTool
|-bin
| |-DXVKoTool {executable}
|-lib
|-{resources, binaries, etc.}
However building the Flatpak is somehow driving me crazy and I'm not sure what's wrong.
My flatpak build YAML file:
app-id: dev.datlag.DXVKoTool
runtime: org.freedesktop.Platform
runtime-version: '21.08'
sdk: org.freedesktop.Sdk
command: DXVKoTool
modules:
- name: dxvkotool
buildsystem: simple
build-commands:
- mkdir -p /app/lib/
- install -Dm755 ./build/release/main/app/DXVKoTool/bin/DXVKoTool /app/bin/DXVKKoTool
- cp -R ./build/release/main/app/DXVKoTool/lib/* /app/lib/
sources:
- type: file
path: ./build/release/main/app/DXVKoTool/bin/DXVKoTool
- type: dir
path: ./build/release/main/app/DXVKoTool/lib/
When I run the flatpak-builder command, it's stopping with the following error:
Emptying app dir 'build/release/main/flatpak'
Downloading sources
Starting build of dev.datlag.DXVKoTool
Cache hit for openjdk, skipping build
Cache miss, checking out last cache hit
========================================================================
Building module git in /home/jeff/Projects/Multiplatform/DXVKoTool/.flatpak-builder/build/git-1
========================================================================
Running: mkdir -p /app/lib/
Running: install -Dm755 ./build/release/main/app/DXVKoTool/bin/DXVKoTool /app/bin/DXVKoTool
install: cannot stat './build/release/main/app/DXVKoTool/bin/DXVKoTool': No such file or directory
When I change the config to the following:
app-id: dev.datlag.DXVKoTool
runtime: org.freedesktop.Platform
runtime-version: '21.08'
sdk: org.freedesktop.Sdk
command: DXVKoTool
modules:
- name: dxvkotool
buildsystem: simple
build-commands:
- mkdir -p /app/lib/
- install -Dm755 DXVKoTool /app/bin/DXVKoTool
- cp -R lib/* /app/lib/
sources:
- type: file
path: ./build/release/main/app/DXVKoTool/bin/DXVKoTool
- type: dir
path: ./build/release/main/app/DXVKoTool/
The building works but after installing the outcome it doesn't start with this error:
bwrap: execvp DXVKoTool: No such file or directory
Would be nice if someone can help me building the Flatpak.

Debug OpenJDK14 using CLion: failed to load the CMake project

I download the source code of OpenJDK14 and put them in \home\yuanfang\jdk14 and after running bash configure --disable-warnings-as-errors and make images, I build OpenJDK14 successfully, The newly built JDK is in home\yuanfang\jdk14\build\linux-x86_64-server-release\jdk. By the way, I am using Ubuntu 20.04 LTS.
Then I want to debug OpenJDK14 using CLion IDE. I was using CLion 2020.2 and I take the following steps:
After open CLion I choose Create New CMake Project from Sources and choose the directory of \home\yuanfang\jdk14, which is the root directory of the jdk project.
I alter the Run/Debug Configurations to make it look like this:
CLion create a CMakeLists.txt automatically but the file doesn't work, so after googling I find find the correct CMakeLists.txt here at https://github.com/ojdkbuild/ojdkbuild/blob/master/src/java-14-openjdk/CMakeLists.txt. I then rewrite the old CMakeLists.txt using the correct one.
I download the whole repository(that is, github.com/ojdkbuild/ojdkbuild), unzip it and put it into \home\yuanfang\jdk14.
It looks like as follow, the ojdkbuild-master is the newly added folder.
I reload the CMake project, but some CMake error occurs(as follow), why can't CLion find those files? javaI googled but can't find any effective solution. Is there anything I can do or refer to? Thanks in advance.
CMake Error at CMakeLists.txt:19 (include):
include could not find load file:
/home/yuanfang/jdk14/../../resources/cmake/ojdkbuild_common.cmake
CMake Error at CMakeLists.txt:21 (include):
include could not find load file:
/home/yuanfang/jdk14/../../resources/cmake/version.cmake
CMake Error at CMakeLists.txt:93 (add_subdirectory):
add_subdirectory given source
"/home/yuanfang/jdk14/../../deps/rhino/scripting_tasks" which is not an
existing directory.
CMake Error at CMakeLists.txt:98 (ojdkbuild_add_subdirectory):
Unknown CMake command "ojdkbuild_add_subdirectory".
-- Configuring incomplete, errors occurred!
See also "/home/yuanfang/jdk14/cmake-build-debug/CMakeFiles/CMakeOutput.log".
Cannot get compiler information:
Compiler exited with error code 1: /usr/bin/cc -xobjective-c -I/home/yuanfang/jdk14/build/linux-x86_64-server-release/hotspot/variant-server/gensrc/adfiles......./loading/LibraryLoader/jar_src -g -fpch-preprocess -v -dD -E
Using built-in specs.
COLLECT_GCC=/usr/bin/cc
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-10ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)
COLLECT_GCC_OPTIONS='-I' '/home/yuanfang/jdk14/build/linux-x86_64-server-release/hotspot/variant-server/gensrc/adfiles' '-I' '......'-g' '-fpch-preprocess' '-v' '-dD' '-E' '-D' '___CIDR_DEFINITIONS_END' '-mtune=generic' '-march=x86-64'
cc1obj -E -quiet -v #/tmp/cci3XM6r -imultiarch x86_64-linux-gnu -D ___CIDR_DEFINITIONS_END /tmp/compiler-file5929385022787926768 -mtune=generic -march=x86-64 -fpch-preprocess -g -fworking-directory -fasynchronous-unwind-tables -fstack-protector-strong -Wformat -Wformat-security -fstack-clash-protection -fcf-protection -dD
cc: fatal error: cannot execute 'cc1obj': execvp: No such file or directory
compilation terminated.
[Failed to reload]

step: check out this projecdt :https://github.com/ojdkbuild/ojdkbuild.git
step: put the source code of OpenJDK14 in ojdkbuild/src/
step: copy reousrces directory and CMakelists.txt to OpenJDK14
step： recomile openjdk and import project to CLin

Java agent library failed to init: instrument

I'm working on an open-source project called "Cloudnet-v3". I am using a symlink /data on my local machine to the data-point in my IntelliJProjects-Folder.
I got the following startup command:
[java, -XX:+UseG1GC, -XX:MaxGCPauseMillis=50, -XX:-UseAdaptiveSizePolicy, -XX:CompileThreshold=100, -XX:+UnlockExperimentalVMOptions, -XX:+UseCompressedOops, -Dcom.mojang.eula.agree=true, -Djline.terminal=jline.UnsupportedTerminal, -Dfile.encoding=UTF-8, -Dio.netty.noPreferDirect=true, -Dclient.encoding.override=UTF-8, -Dio.netty.maxDirectMemory=0, -Dio.netty.leakDetectionLevel=DISABLED, -Dio.netty.recycler.maxCapacity=0, -Dio.netty.recycler.maxCapacity.default=0, -DIReallyKnowWhatIAmDoingISwear=true, -Dcloudnet.wrapper.receivedMessages.language=english, -Xmx372M, -javaagent: "/data/temp/caches/wrapper.jar", -cp, "/data/launcher/libs/io/kubernetes/client-java/4.0.0/client-java-4.0.0.jar:/data/launcher/libs/io/netty/netty-codec-http/4.1.36.Final/netty-codec-http-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-handler/4.1.36.Final/netty-handler-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-transport-native-epoll/4.1.36.Final/netty-transport-native-epoll-4.1.36.Final-linux-x86_64.jar:/data/launcher/libs/io/netty/netty-transport-native-kqueue/4.1.36.Final/netty-transport-native-kqueue-4.1.36.Final-osx-x86_64.jar:/data/launcher/libs/io/kubernetes/client-java-api/4.0.0/client-java-api-4.0.0.jar:/data/launcher/libs/io/kubernetes/client-java-proto/4.0.0/client-java-proto-4.0.0.jar:/data/launcher/libs/org/yaml/snakeyaml/1.19/snakeyaml-1.19.jar:/data/launcher/libs/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/data/launcher/libs/org/apache/commons/commons-compress/1.18/commons-compress-1.18.jar:/data/launcher/libs/org/apache/commons/commons-lang3/3.7/commons-lang3-3.7.jar:/data/launcher/libs/com/squareup/okhttp/okhttp-ws/2.7.5/okhttp-ws-2.7.5.jar:/data/launcher/libs/com/google/guava/guava/25.1-jre/guava-25.1-jre.jar:/data/launcher/libs/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar:/data/launcher/libs/org/bouncycastle/bcprov-ext-jdk15on/1.59/bcprov-ext-jdk15on-1.59.jar:/data/launcher/libs/org/bouncycastle/bcpkix-jdk15on/1.59/bcpkix-jdk15on-1.59.jar:/data/launcher/libs/com/google/protobuf/protobuf-java/3.4.0/protobuf-java-3.4.0.jar:/data/launcher/libs/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/data/launcher/libs/io/netty/netty-codec/4.1.36.Final/netty-codec-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-transport-native-unix-common/4.1.36.Final/netty-transport-native-unix-common-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-transport/4.1.36.Final/netty-transport-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-buffer/4.1.36.Final/netty-buffer-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-resolver/4.1.36.Final/netty-resolver-4.1.36.Final.jar:/data/launcher/libs/io/netty/netty-common/4.1.36.Final/netty-common-4.1.36.Final.jar:/data/launcher/libs/io/sundr/builder-annotations/0.9.2/builder-annotations-0.9.2.jar:/data/launcher/libs/io/swagger/swagger-annotations/1.5.12/swagger-annotations-1.5.12.jar:/data/launcher/libs/com/squareup/okhttp/logging-interceptor/2.7.5/logging-interceptor-2.7.5.jar:/data/launcher/libs/com/squareup/okhttp/okhttp/2.7.5/okhttp-2.7.5.jar:/data/launcher/libs/joda-time/joda-time/2.9.3/joda-time-2.9.3.jar:/data/launcher/libs/org/joda/joda-convert/1.2/joda-convert-1.2.jar:/data/launcher/libs/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar:/data/launcher/libs/org/checkerframework/checker-qual/2.0.0/checker-qual-2.0.0.jar:/data/launcher/libs/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/data/launcher/libs/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/data/launcher/libs/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/data/launcher/libs/org/bouncycastle/bcprov-jdk15on/1.59/bcprov-jdk15on-1.59.jar:/data/launcher/libs/io/sundr/sundr-core/0.9.2/sundr-core-0.9.2.jar:/data/launcher/libs/io/sundr/sundr-codegen/0.9.2/sundr-codegen-0.9.2.jar:/data/launcher/libs/io/sundr/resourcecify-annotations/0.9.2/resourcecify-annotations-0.9.2.jar:/data/launcher/libs/com/squareup/okio/okio/1.6.0/okio-1.6.0.jar:/data/launcher/versions/3.0.0-RELEASE-e48128a/driver.jar:/data/temp/caches/wrapper.jar", de.dytanic.cloudnet.wrapper.Main, nogui]
And my current workdir is: /data/temp/services/Lobby-1#4a517311-09e6-4f77-89a5-64b4bc15399a
So whenever I am in the workdir and execute the given command, it fails with the following error: Error opening zip file or JAR manifest missing :
Error occurred during initialization of VM
agent library failed to init: instrument Full Log
Now I am wondering because it's working in the automatic-environment but there are no changes to the master-Branch Source e.g. a changed Path to /data/launcher instead of launcher (System.getProperty("cloudnet.launcher.dir", "/data/launcher"))[https://github.com/CloudNetService/CloudNet-v3/blob/master/cloudnet-launcher/src/main/java/de/dytanic/cloudnet/launcher/Constants.java].
A short lookup: ls -laR /Users/.../Documents/IdeaProjects/cloudnet-parent/data

javaagent option is misused. Correct syntax is
-javaagent:/data/temp/caches/wrapper.jar

Hadoop build Failing in Windows: zconf.h is missing from native.sln?

I'm trying to build the following hadoop version on development computer with Windows 10 Home Edition
hadoop-2.7.3-src
Here are the details about my local development environment:
-Windows 10 Home Edition
-Intel Core i5-6200U CPU #2.30GHz
-RAM 16 GB
-64-bit Operating System, x64-based processor
-Microsoft Visual Studio Community 2015 Version 14.0.25431.01 Update 3
-Also added MSBUILD location as C:\Program Files (x86)\MSBuild\14.0\Bin\amd64 to Windows System Environment Variable Path
-.NET Framework 4.6.01586
-cmake version 3.7.2
-CYGWIN_NT-10.0 LTPBCV82DUG 2.7.0(0.306/5/3) 2017-02-12 13:18 x86_64 Cygwin
-java version "1.8.0_121"
-Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
-Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
-Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T11:41:47-05:00)
-Google Protocol Buffers protoc --version libprotoc 2.5.0
Also, I've created and system environment variable called Platform and set it to x64
I opened up Developer Command Prompt for Visual Studio 2015 (VS2015)
c:\hadoop\hadoop-2.7.3-src> mvn package -Pdist,native-win -DskipTests -Dtar -X
Unfortunately, I'm getting the following error:
[C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
ZlibDecompressor.c
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
Done Building Project "C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj" (default targets) -- FAILED.
Done Building Project "C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln" (default targets) -- FAILED.
Build FAILED.
"C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln" (default target) (1) ->
"C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj" (default target) (2) ->
(ClCompile target) ->
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:02.49
The aforementioned error has to do with zlib tool.
After researching online, someone said that the following Visual Studio solution file needs to be built successfully in Visual Studio:
....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln
Using Visual Studio 2015 in Administrator mode, I opened up the native.sln file, and immediately saw an error:
enter image description here
Could someone please tell me what steps I have to take to resolve said error?

So there were quite a few steps I had to take in order to resolve the problems.
Within the ....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\winutils directory, I opened up the following solution in Visual Studio 2015:
winutils.sln
Within .....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\winutils\libwinutils.c , I commented out the following line of code, and made a modified copy of it as shown below:
//const WCHAR* wsceConfigRelativePath = WIDEN_STRING(STRINGIFY(WSCE_CONFIG_DIR)) L"\\" WIDEN_STRING(STRINGIFY(WSCE_CONFIG_FILE));
const WCHAR* wsceConfigRelativePath = WIDEN_STRING("../etc/hadoop") L"\\" WIDEN_STRING("wsce-site.xml");
Also, In the winutils solution's property window, I had to set the platform value to x64 as the screenshot below shows:
Next, I opened Dos command prompt, and checked the exact version of my Windows OS:
ver
Microsoft Windows [Version 10.0.14393]
Also, I opened up the property window of the libwinutils project, and ensured that properties that are marked in the following snapshot had the proper values:
Also, I took the same steps for the properties of the winutils project:
(Sorry, stackoverflow would not allow me to place another picture snapshot, but all you basically have to do is make sure the the winutils project's property are set properly )
I downloaded zlib version 1.2.11 source code. Using Developer Command Prompt for VS2015 ( Visual Studio 2015 ) I built zlib from zlib version 1.2.11 source code using cmake
c:\zlib\zlib-1.2.11>cmake -G "Visual Studio 14 2015" -A x64 c:\zlib\zlib-1.2.11\
-- The C compiler identification is MSVC 19.0.24215.1
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of off64_t
-- Check size of off64_t - failed
-- Looking for fseeko
-- Looking for fseeko - not found
-- Looking for unistd.h
-- Looking for unistd.h - not found
-- Configuring done
-- Generating done
-- Build files have been written to: C:/zlib/zlib-1.2.11
Finally, run the build with cmake
c:\zlib\zlib-1.2.11>cmake --build .
In Windows System Variables I have the following variable defined:
ZLIB_HOME is set to C:\zlib\zlib-1.2.11

GnuPG for Java library ant build issue/bug

I'm working GnuPG Java API to encrypt/decrypt files.
Googled and found a Java Wrapper GnuPG for Java, Java wrapper for GPGME(GnuPG Made Easy,C language library).
Official website also referring this as the Java wrapper.
So followed the instructions, set up ant and tried to run ant clean release
it is throwing errors.
But maven build working and jar file also generated.
Following error occured while running ant.
C:\Users\user\Desktop\MFT\gnupg-for-java-master>ant clean release
Buildfile: C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml
clean-native:
[exec] rm -f GnuPGContext.o GnuPGData.o GnuPGGenkeyResult.o GnuPGKey.o GnuPGSignature.o gpgmeutils.o *~
[exec] rm -f C:\Users\user\Desktop\MFT\gnupg-for-java-master\build/gnupg-for-java.dll
[exec] rm -f com_freiheit_gnupg_GnuPGContext.h com_freiheit_gnupg_GnuPGData.h com_freiheit_gnupg_GnuPGGenkeyResult.h com_freiheit_gnupg_GnuPG
Key.h com_freiheit_gnupg_GnuPGSignature.h
clean:
[delete] Deleting directory C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\classes
prepare:
compile-java:
[mkdir] Created dir: C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\classes
[javac] C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:21: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=l
ast; set to false for repeatable builds
[javac] Compiling 8 source files to C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\classes
gen-jni-headers:
prepare:
compile-java:
[javac] C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:21: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=l
ast; set to false for repeatable builds
generate-jni-headers:
[exec] C:\Program Files (x86)/Java/jdk1.7.0_51/bin/javah -classpath C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\classes -jni com.freih
eit.gnupg.GnuPGContext com.freiheit.gnupg.GnuPGData com.freiheit.gnupg.GnuPGGenkeyResult com.freiheit.gnupg.GnuPGKey com.freiheit.gnupg.GnuPGSigna
ture
[exec] /bin/sh: -c: line 0: syntax error near unexpected token `('
[exec] /bin/sh: -c: line 0: `C:\Program Files (x86)/Java/jdk1.7.0_51/bin/javah -classpath C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\c
lasses -jni com.freiheit.gnupg.GnuPGContext com.freiheit.gnupg.GnuPGData com.freiheit.gnupg.GnuPGGenkeyResult com.freiheit.gnupg.GnuPGKey com.fre
iheit.gnupg.GnuPGSignature'
[exec] make: *** [com_freiheit_gnupg_GnuPGContext.h] Error 2
BUILD FAILED
C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:71: The following error occurred while executing this line:
C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:63: exec returned: 2
Total time: 4 seconds
Update
I changed the Java home in GNUmakefile, Now it is throwing different error. Seems c library not found and this API is written for Unix system seems by reading the error message. What C library missing ?
generate-jni-headers:
[exec] C:\Java\jdk1.7.0_75/bin/javah -classpath C:\Users\user\Desktop\MFT\gnupg-for-java-master\build\classes -jni com.freiheit.gnupg.GnuPGConte
xt com.freiheit.gnupg.GnuPGData com.freiheit.gnupg.GnuPGGenkeyResult com.freiheit.gnupg.GnuPGKey com.freiheit.gnupg.GnuPGSignature
gen-jni-library:
recompile-c-code:
[exec] mingw32-gcc -g -Werror -Wall -Wno-deprecated-declarations -fPIC -mms-bitfields -Wl,--add-stdcall-alias -D_REENTRANT -D_THREAD_SAFE -D_FIL
E_OFFSET_BITS=64 -DLARGEFILE_SOURCE=1 -I"C:\Java\jdk1.7.0_75/include" -I"C:\Java\jdk1.7.0_75/include/win32" -I"C:\Program Files (x86)/GNU/GnuPG/includ
e" -c GnuPGContext.c
[exec] /bin/sh: mingw32-gcc: command not found
[exec] make: *** [GnuPGContext.o] Error 127
BUILD FAILED
C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:82: The following error occurred while executing this line:
C:\Users\user\Desktop\MFT\gnupg-for-java-master\build.xml:75: exec returned: 2
Total time: 7 seconds
Can anyone help me to solve this issue ?
Where I'm making mistake ?

I rewrote my answer because I wanted to create a complete guide.
Install GnuPG and MinGW-Get to a directory without spaces.
After you installed MinGW with !!!GUI!!!, open mingw-get, install these components:
mingw32-gcc (check all)
mingw32-libz (the dll is the most important)
Download and install MSYS, that is a command line toolkit for running commands like make.
Then put c:\msys\1.0\bin\ (or wherever you installed it) on the beginning of the PATH variable. Restart eclipse or open a new cmd, and it should work.
In the build.xml:
line 21:
classpath="lib/junit-4.4.jar" added.(and the junit is in the lib dir)
In the GNUmakefile:
line 9 :
ALL_CFLAGS := -Wall -Wno-deprecated-declarations -fPIC
line 10:
ALL_CPPFLAGS = -D_REENTRANT -D_THREAD_SAFE -D_FILE_OFFSET_BITS=64 -DLARGEFILE_SOURCE=1 \
-I"c:/WORK/x/gnu/jdk/jdk1.8.0_25/include" -I"c:/WORK/x/gnu/jdk/jdk1.8.0_25/include/win32"
line 21-27:
JAVA_HOME := c:/WORK/x/gnu/jdk/jdk1.8.0_25
ALL_CFLAGS += -mms-bitfields -Wl,--add-stdcall-alias
ALL_CPPFLAGS += -I"c:/WORK/x/gnu/jdk/jdk1.8.0_25/include/win32" -I"c:/WORK/x/gnu/jdk/jdk1.8.0_25/include" -I"c:/GNU/GnuPG/include"
ALL_LDFLAGS := -s -shared -Wl,--enable-auto-import
ALL_LIBS := -L"c:/GNU/GnuPG" -lgpgme-11
GNUPG_LIB := $(BUILD_DIR)/gnupg-for-java.dll
line 63:
$(CC) $(DEBUG) $(ALL_CFLAGS) $(ALL_LDFLAGS) $^ -o "$(BUILD_DIR)/gnupg-for-java.dll" $(ALL_LIBS)
Summary: This is working for me and outputs the jar and dll file to the build directory. My work directory was c:/WORK/x so replace the paths where it is different. Don't use "Program Files" anywhere, as you can see I had to copy everything from there.

The error message is telling that it cannot find mingw32-gcc in /bin/sh.
You should install mingw at first and add it to your path. Check that mingw32-gcc can be launched from the command line.
Are you running the ant script from cygwin? It's a bit strange that it is referring /bin/sh. Maybe you should try to run it from cygwin. Or check the build.xml file to see how mingw32-gcc is called. It must be recompile-c-code target.