Doesn't build undir Windows using mingw32

[markokocic]

Hi, I succeeded building go-fltk and examples on windows box by slightly tweaking the makefile, but when I try to run examle I get the following panic error.

c:\development\cvstree\go-fltk\examples>hello
throw: cgocall unavailable

panic PC=0x83a07c
runtime.throw+0x47 /go/src/pkg/runtime/runtime.c:76
        runtime.throw(0x4de170, 0x0)
runtime.cgocall+0x32 /go/src/pkg/runtime/cgocall.c:19
        runtime.cgocall(0x0, 0x83a0b4, 0x0)
fltk._Cfunc_go_fltk_get_UP_BOX+0x32 /development/cvstree/go-fltk/_cgo_defun.c:127
        fltk._Cfunc_go_fltk_get_UP_BOX(0x0, 0x0)
fltk.init┬╖1+0x1e c:/development/cvstree/go-fltk/fltk.cgo1.go:-58
        fltk.init┬╖1()
fltk.Init┬╖+0x50 c:/development/cvstree/go-fltk/fltk.cgo1.go:169
        fltk.Init┬╖()
main.init+0x46 c:/development/cvstree/go-fltk/examples/hello.go:16
        main.init()
runtime.mainstart+0x5 386/asm.s:82
        runtime.mainstart()
runtime.goexit /go/src/pkg/runtime/proc.c:146
        runtime.goexit()

I suppose the problem is that something is not compiled or linked as it should?

Here are my modifications to makefiles:

diff --git a/Makefile b/Makefile
index 6b4f159..c1d2753 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ CGOFILES=
window.go
CGO_DEPS=fltk.o

-CGO_LDFLAGS=fltk.o $(FLTK_LIB) -lXext -lXinerama -lXft -lX11 -lXi -lm
+CGO_LDFLAGS=fltk.o $(FLTK_LIB) -lm -lpthread -lmsimg32 -lole32 -luuid -lcomctl32 -lwsock32 -lgdi32

 include $(GOROOT)/src/Make.pkg

@@ -44,7 +44,7 @@ $(FLTK)/stamp: $(FLTK_DIST)
    touch $(FLTK)/stamp

 $(FLTK_DIST):
-   (cd /tmp; wget $(FLTK_URL))
+   (cd /tmp; curl -C - -O $(FLTK_URL))

 clean-fltk:
    rm -rf $(FLTK)
diff --git a/examples/Makefile b/examples/Makefile
index b70a4f1..7ef6e8b 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -4,7 +4,7 @@ pkgdir=$(GOROOT)/pkg/$(GOOS)_$(GOARCH)
 all: $(BINS)

 text hello : % : %.go $(pkgdir)/cgo_fltk.so $(pkgdir)/fltk.a
-   8g $@.go && 8l -o $@ $@.8
+   8g $@.go && 8l -o $@.exe $@.8

 clean:
    rm -f $(BINS) *.8

[zot]

Sorry -- I didn't see this comment; it was buried under a huge torrent of email.

This thread seems to say that cgo isn't really supported on windows, yet:
http://groups.google.com/group/golang-nuts/browse_thread/thread/7c11f1049d2b556a

I'll ping the go list and see what they say.

[zot]

Here's the thread where I asked about it: http://groups.google.com/group/golang-nuts/browse_thread/thread/6018fafc0c9cbee2#

[zot]

Apparently cgo is still only experimental on windows and doesn't totally work, yet. I hope it does soon!

[zot]

Wei Guangjing replied to my thread with some advice that may solve the problem:

http://groups.google.com/group/golang-nuts/msg/23ef437bf5ed1d49

Hope this helps -- I'm very interested in seeing this work on Windows!

[markokocic]

Thanks. I'll have to wait for another Go release to try this, since I was not able to build Go under Windows yet.