pkg-config: exit status 3221225781

[ManPython]

1.I'm trying qt.go in alternative to the therecipe but have this type log:

C:\>go run %GOPATH%src\github.com\kitech\qt.go\examples\button.go
# pkg-config --cflags  -- libffi
pkg-config: exit status 3221225781

Regarding to the #5 (comment)
TDMx64 in default install not have the pkg-config.exe and added this manualy as pkg-config_0.28-1_win64.zip

Don't know how to force env on gopath\go\src\github.com\qtchina\qtenv_win64

[ManPython]

I have in TDM lib:

├─── gcc
│ libbfd.a
│ libdl.a
│ libdl.dll.a
│ libffi.a
│ libffi.dll.a
│ libopcodes.a
│ libpsapi.a
│
├───libffi-3.2.1
│ └───include
│ ffi.h
│ ffitarget.h
│
└───pkgconfig
dlfcn.pc

[ManPython]

2. Don't know what is difference when runing go build from
   gopath\go\src\github.com\qtchina\qtenv_win64>go build -o button.exe \gopath\go\src\github.com\kitech\qt.go\examples\button.go
   but the log is diffrent

# pkg-config --cflags  -- libffi
Package libffi was not found in the pkg-config search path.
Perhaps you should add the directory containing `libffi.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libffi' found
pkg-config: exit status 1

a) What is libffi.pc ?
b) Is this related with dlfcn.pc?
c) When I copied b) and renamed for a) then many errors like this:
AppData\Local\Temp\go-build910741502\b034\_x010.o:ffi_invoke.c:(.rdata$.refptr.ffi_type_float[.refptr.ffi_type_float]+0x0): undefined reference to `ffi_type_float' collect2.exe: error: ld returned 1 exit status

[kitech]

That lib/include are qt.go need indeed.

But you only need install TDM (with pkg-config.exe) only, not the libffi package. Because there is one in a repo: https://github.com/qtchina/qt512_qtenv_win64.

So, after you installed TDM, then clone this repo:

git clone https://github.com/qtchina/qt512_qtenv_win64 d:/qtenv

and note this repo not need put under %gopath% like last post gopath\go\src\github.com\qtchina\qtenv_win64, just put a short directory is fine.

Another, did you set the CGO_CFLAGS and CGO_LDFLAGS environment variables, just like https://github.com/kitech/qt.go/blob/master/install.md#windows-static-qt

[kitech]

a) What is libffi.pc ?
b) Is this related with dlfcn.pc?

These is used by pkg-config to find proper lib/include, it's a standard mostly in unix/linux world.

It's cannot help if only copy a .pc file.

[kitech]

I think you lib/include directory structure is fine, try set proper environment variables should be helpful.

Try set an extra PKG_CONFIG_PATH,

set PKG_CONFIG_PATH=tdmdir\lib\pkgconfig

[ManPython]

3.Strange

C:\>ECHO %CGO_CFLAGS%
D:\qtenv_win64\lib\libffi-3.2.1\include

C:\>echo %CGO_LDFLAGS%
D:\qtenv_win64\lib\libffi-3.2.1

C:\>
C:\>go build -o button.exe %GOPATH%\src\github.com\kitech\qt.go\examples\button.go
# runtime/cgo
E:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find D:\qtenv_win64\lib\libffi-3.2.1: Permission denied
collect2.exe: error: ld returned 1 exit status
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv_win64\lib\libffi-3.2.1\include: linker input file unused because linking not done

C:\>

And after rebot and change qtenv_win64 to qtenv that solved Permission denied in sys var

C:\>go build -o button.exe %GOPATH%\src\github.com\kitech\qt.go\examples\button.go
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include: linker input file unused because linking not done
# pkg-config --cflags  -- libffi
pkg-config: exit status 3221225781

[ManPython]

4. I repeated clone repo and.. log is diffrent. I totaly not controling the env
   E:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -ldl collect2.exe: error: ld returned 1 exit status

# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# runtime/cgo
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# github.com/kitech/dl
E:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -ldl
E:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -ldl
collect2.exe: error: ld returned 
collect2.exe: error: ld returned 1 exit status
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done
# github.com/kitech/dl
gcc: warning: D:\qtenv\lib\libffi-3.2.1\include\: linker input file unused because linking not done

[ManPython]

Most often GO need TDM, why in https://github.com/kitech/qt.go/blob/master/install.md#windows-static-qt is install from mingw-64 i686-win32-sjlj-7.2.0 ?

D:\qtenv>gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=E:/TDM-GCC-64/bin/../libexec/gcc/x86_64-w64-mingw32/5.1.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../../../src/gcc-5.1.0/configure --build=x86_64-w64-mingw32 --enable-targets=all --enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-libgomp --enable-lto --enable-graphite --enable-cxx-flags=-DWINPTHREAD_STATIC --disable-build-with-cxx --disable-build-poststage1-with-cxx --enable-libstdcxx-debug --enable-threads=posix --enable-version-specific-runtime-libs --enable-fully-dynamic-string --enable-libstdcxx-threads --enable-libstdcxx-time --with-gnu-ld --disable-werror --disable-nls --disable-win32-registry --prefix=/mingw64tdm --with-local-prefix=/mingw64tdm --with-pkgversion=tdm64-1 --with-bugurl=http://tdm-gcc.tdragon.net/bugs
Thread model: posix
gcc version 5.1.0 (tdm64-1)

[ManPython]

I'm not sure about the sys vars (should be as here #43 (comment)) and sets CGO_CFLAGS & CGO_LDFLAGS (or do this by set in cmd?).

C:\>set CGO_CFLAGS=-ID:/qtenv/include -ID:/qtenv/lib/libffi-3.2.1/include/

C:\>set CGO_LDFLAGS=-LD:/qtenv/lib

C:\>go build -o button.exe %GOPATH%\src\github.com\kitech\qt.go\examples\button.go
# pkg-config --cflags  -- libffi
pkg-config: exit status 3221225781

Hvr.. I'm still in this same point.
There is space in args -- libffi

This same situation with https://github.com/qtchina/qt512_qtenv_win32

[kitech]

try go build -v -x for verbose log

[ManPython]

No special changes by this comand

C:\>go build -v -x E:\gopath\go\src\github.com\kitech\qt.go\examples\button.go
WORK=C:\Users\xxx\AppData\Local\Temp\go-build612429062
github.com/kitech/qt.go/qtrt
mkdir -p $WORK\b034\
cd E:\Go\src\github.com\kitech\qt.go\qtrt
pkg-config --cflags -- libffi
# pkg-config --cflags  -- libffi
pkg-config: exit status 3221225781

I put to D:\qtenv_win64\lib\pkgconfig
https://raw.githubusercontent.com/libffi/libffi/master/libffi.pc.in as libffi.pc
but no changes

[ManPython]

@kitech I think that in qtrt are problems with the .h files eg. #include "ffi.h" and other related to .c files
Can you compare own repo with the git or are you use just git?

[ManPython]

@kitech I think that I found the problem
https://github.com/kitech/qt.go/blob/master/qtrt/c.go
Your file

package qtrt

/*
#cgo pkg-config: libffi
*/
import "C"

My sugestion:

package qtrt


// #cgo pkg-config: libffi
// #cgo CFLAGS: -ID:\qtenv_win64\include\ -ID:\qtenv_win64\lib\libffi-3.2.1\include\ -DPNG_DEBUG=1 
// #cgo LDFLAGS: -LD:\qtenv_win64\lib\

import "C"

Looks that global comment /* not working in GO compilator and must be single line like //
And static include can prevent to case of "premission denied" in sys vars that in some case are not visible like here #43 (comment)

[ManPython]

Now I have error like:

Go\src\github.com\kitech\qt.go\qtrt\ffi_invoke.go:10:17: fatal error: ffi.h: No such file or directory
compilation terminated.

If adding:
https://github.com/libffi/libffi/blob/master/include/ffi.h.in

Go\src\github.com\kitech\qt.go\qtrt\ffi_invoke.go:10:0:
./ffi.h:52:9: error: macro names must be identifiers
 #ifndef @TARGET@
         ^
./ffi.h:58:23: fatal error: ffitarget.h: No such file or directory
compilation terminated.

If adding:
https://raw.githubusercontent.com/libffi/libffi/master/src/x86/ffitarget.h

# github.com/kitech/qt.go/qtrt
In file included from C:\Go\src\github.com\kitech\qt.go\qtrt\ffi_invoke.go:10:0:
./ffi.h:52:9: error: macro names must be identifiers
 #ifndef @TARGET@
         ^
In file included from C:\Go\src\github.com\kitech\qt.go\qtrt\ffi_invoke.go:10:0:
./ffi.h:200:5: error: token "@" is not valid in preprocessor expressions
 #if @HAVE_LONG_DOUBLE@
     ^
./ffi.h:209:5: error: token "@" is not valid in preprocessor expressions
 #if @HAVE_LONG_DOUBLE@
     ^
./ffi.h:309:5: error: token "@" is not valid in preprocessor expressions
 #if @FFI_EXEC_TRAMPOLINE_TABLE@
     ^
./ffi.h:356:5: error: token "@" is not valid in preprocessor expressions
 #if @FFI_EXEC_TRAMPOLINE_TABLE@
     ^
./ffi.h:381:5: error: token "@" is not valid in preprocessor expressions
 #if @FFI_EXEC_TRAMPOLINE_TABLE@
     ^
./ffi.h:491:5: error: token "@" is not valid in preprocessor expressions
 #if @HAVE_LONG_DOUBLE@

And there is comment part of code again with #include "ffi.h" but I can't recognize this all logic of stuff.
https://travis-ci.org/kitech/qt.go/jobs/573476139

[kitech]

// #cgo LDFLAGS: -LD:\qtenv_win64\lib\

Hard code path is not portable between OSes.

import "C" must just below comment, no empty line.