Prebuild flatc.exe, please :)

[Markus Junginger]

I want to use flatc on a Windows machine and setting up the toolchain is cruel. I don't want to install Visual Studio, so I gave a shot at MinGW+CMake, which isn't a pleasant experience either.

Here's what I got in the end:

s:\git\flatbuffers>cmake -G "MinGW Makefiles"

-- The C compiler identification is GNU 4.8.1

-- The CXX compiler identification is GNU 4.8.1

-- Check for working C compiler: C:/MinGW/bin/gcc.exe

-- Check for working C compiler: C:/MinGW/bin/gcc.exe -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Check for working CXX compiler: C:/MinGW/bin/g++.exe

-- Check for working CXX compiler: C:/MinGW/bin/g++.exe -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Configuring done

-- Generating done

-- Build files have been written to: S:/git/flatbuffers

s:\git\flatbuffers>mingw32-make

Scanning dependencies of target flatc

[  7%] Building CXX object CMakeFiles/flatc.dir/src/idl_parser.cpp.obj

[ 15%] Building CXX object CMakeFiles/flatc.dir/src/idl_gen_cpp.cpp.obj

[ 23%] Building CXX object CMakeFiles/flatc.dir/src/idl_gen_java.cpp.obj

In file included from c:\mingw\include\direct.h:34:0,

                 from S:\git\flatbuffers\src\idl_gen_java.cpp:24:

c:\mingw\include\io.h:301:14: error: 'off64_t' does not name a type

 __CRT_INLINE off64_t lseek64 (int, off64_t, int);

              ^

c:\mingw\include\io.h:302:14: error: 'off64_t' does not name a type

 __CRT_INLINE off64_t lseek64 (int fd, off64_t offset, int whence) {

              ^

CMakeFiles\flatc.dir\build.make:102: recipe for target 'CMakeFiles/flatc.dir/src/idl_gen_java.cpp.obj' failed

mingw32-make[2]: *** [CMakeFiles/flatc.dir/src/idl_gen_java.cpp.obj] Error 1

CMakeFiles\Makefile2:59: recipe for target 'CMakeFiles/flatc.dir/all' failed

mingw32-make[1]: *** [CMakeFiles/flatc.dir/all] Error 2

Makefile:116: recipe for target 'all' failed

mingw32-make: *** [all] Error 2

Again, I strongly propose offering a prebuild exe for Windows. Nevertheless, I also welcome some help on that off64_t issue.

Thanks,

Markus

[Wouter van Oortmerssen]

You're right, I was already thinking that be a good idea, I'll make it a priority.

I'll also see if I can fix these errors :)

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[Wouter van Oortmerssen]

Just tried to reproduce these errors. Just downloaded a fresh copy of MinGW.

From the Msys shell, cmake -G "MSYS Makefiles"; make; ./flattests all works.

Also tried from a DOS shell, using cmake -G "MinGW Makefiles", which fails with this error: http://lists.gnu.org/archive/html/bug-make/2013-05/msg00083.html which apparently still hasn't been fixed. I'm unable to get around it.

Would suggest using the Msys shell, as it works more predictably.

[Wouter van Oortmerssen]

Oh, and releases from now on will have a windows exe, like the last one:

https://github.com/google/flatbuffers/releases