#include and linker flags

icecubeflower · 11-24-2009, 08:26 PM

If I write a super simple wxwidgets program I can compile it like this:
g++ hworld.cpp `wx-config --libs` `wx-config --cxxflags` -o hworld

I assume it found the .h files because I ran ldconfig after installing wxwidgets.

Do the flags in back quotes include the entire set of libraries? Is it overkill?

Also how do I do the same thing in an IDE like Code::Blocks? I can start a WxWidgets project with the wizard and it will compile but I cannot find anywhere in the build options where it has the linker flags. Are they hidden somewhere?

I want to know how to start a wxwidgets project without the wizard but I cannot figure out how. It will never compile. Why doesn't it work like it did at the command prompt? Do I have to tell Code::Blocks what directories to search for .h files? And if so how come when I started a wxwidgets project with the wizard I could not find anything in the build options that told it what directories to search? Why does the wizard's project magically compile?

paulsm4 · 11-24-2009, 09:11 PM

Hi -

Quote:

If I write a super simple wxwidgets program I can compile it like this:
g++ hworld.cpp `wx-config --libs` `wx-config --cxxflags` -o hworld

Quote:

Good

I assume it found the .h files because I ran ldconfig after installing wxwidgets.

Quote:

Yup

Do the flags in back quotes include the entire set of libraries? Is it overkill?

Quote:

Nope

Also how do I do the same thing in an IDE like Code::Blocks? I can start a WxWidgets project with the wizard and it will compile but I cannot find anywhere in the build options where it has the linker flags. Are they hidden somewhere?

I'm sure you've got several alternatives.

But one easy approach is to just:

1. Type "wx-config --libs` `wx-config --cxxflags" from a command line

2. Cut/paste the resulting "-Ixxx and -Lyyy" flags into whatever IDE you're using.

'Hope that helps .. PSM

icecubeflower · 11-24-2009, 09:19 PM

It doesn't show any:

Code:

icecube@inferno:~$ g++ fun.cpp `wx-config --libs` `wx-config --cxxflags` -o fun
icecube@inferno:~$

I don't think linking is the problem. It's that it never finds the .h files in Code::Blocks. First it says wx/wx.h not found. So I add /usr/local/include/wx-2.8 to search directores. But then it says wx/setup.h not found. I keep adding wx directories to make it happy but in doesn't work.

Can I stick `wx-config --libs` `wx-config --cxxflags` into linker options in Codeblocks? I tried but I don't think it works.

icecubeflower · 11-24-2009, 09:22 PM

And just suppose I compile at command line and it showed me linker flags like you said and I copied them into CodeBlocks and it worked. Why are there no linker flags when you start wxwidget project with the wizard and why does it compile just fine without them? I think they are hidden somewhere, maybe in the makefile.

icecubeflower · 11-24-2009, 09:28 PM

They are all in a .depend file.

Code:

# depslib dependency file v1.0
1259117114 source:/home/icecube/asdff/asdffApp.cpp
	"wx_pch.h"
	"asdffApp.h"
	"asdffMain.h"

1259117114 /home/icecube/asdff/asdffApp.h
	<wx/app.h>

1259116434 /usr/local/include/wx-2.8/wx/app.h
	"wx/event.h"
	"wx/build.h"
	"wx/init.h"
	"wx/intl.h"
	"wx/palmos/app.h"
	"wx/msw/app.h"
	"wx/motif/app.h"
	"wx/mgl/app.h"
	"wx/dfb/app.h"
	"wx/gtk/app.h"
	"wx/gtk1/app.h"
	"wx/x11/app.h"
	"wx/mac/app.h"
	"wx/cocoa/app.h"
	"wx/os2/app.h"
	"wx/univ/theme.h"

1259116434 /usr/local/include/wx-2.8/wx/event.h
	"wx/defs.h"
	"wx/cpp.h"
	"wx/object.h"
	"wx/clntdata.h"
	"wx/gdicmn.h"
	"wx/cursor.h"
	"wx/thread.h"
	"wx/dynarray.h"

1259116434 /usr/local/include/wx-2.8/wx/defs.h
	"wx/platform.h"
	"wx/features.h"
	"wx/version.h"
	"wx/dlimpexp.h"
	"wx/debug.h"
	<stddef.h>
	<sys/types.h>
	<unistd.h>
	"wx/msw/winundef.h"

1259116434 /usr/local/include/wx-2.8/wx/platform.h
	<stddef.h>
	<AvailabilityMacros.h>
	<unistd.h>
	"wx/mac/carbon/config_xcode.h"
	"wx/setup.h"
	"wx/chkconf.h"
	"wx/msw/wince/libraries.h"
	"wx/msw/libraries.h"
	"wx/msw/gccpriv.h"
	<AvailabilityMacros.h>

1259116434 /usr/local/lib/wx/include/gtk2-ansi-release-2.8/wx/setup.h

1259116434 /usr/local/include/wx-2.8/wx/chkconf.h
	"wx/palmos/chkconf.h"
	"wx/msw/wince/chkconf.h"
	"wx/msw/chkconf.h"
	"wx/mac/chkconf.h"
	"wx/os2/chkconf.h"
	"wx/mgl/chkconf.h"
	"wx/dfb/chkconf.h"
	"wx/motif/chkconf.h"
	"wx/x11/chkconf.h"
	"wx/univ/chkconf.h"

1259116434 /usr/local/include/wx-2.8/wx/features.h

1259116434 /usr/local/include/wx-2.8/wx/version.h
	"wx/cpp.h"

1259116434 /usr/local/include/wx-2.8/wx/cpp.h

1259116434 /usr/local/include/wx-2.8/wx/dlimpexp.h

1259116434 /usr/local/include/wx-2.8/wx/debug.h
	<assert.h>
	<limits.h>
	"wx/wxchar.h"

1259116434 /usr/local/include/wx-2.8/wx/wxchar.h
	"wx/platform.h"
	"wx/dlimpexp.h"
	<stdio.h>
	<stdarg.h>
	<sys/types.h>
	<wchar.h>
	<wcstr.h>
	<stdlib.h>
	<widec.h>
	<ctype.h>
	<memory.h>
	<stddef.h>
	<stddef.h>
	<string.h>
	<ctype.h>
	<tchar.h>
	<ctype.h>
	<ctype.h>
	<stdio.h>
	<wctype.h>
	<stdio.h>
	<stdio.h>
	<ctype.h>
	<string.h>
	<stdio.h>
	<time.h>
	<time.h>
	<string.h>

1259116434 /usr/local/include/wx-2.8/wx/object.h
	"wx/memory.h"
	"wx/xti.h"
	"wx/msw/msvcrt.h"

1259116434 /usr/local/include/wx-2.8/wx/memory.h
	"wx/defs.h"
	"wx/string.h"
	"wx/msgout.h"
	<stddef.h>

1259116434 /usr/local/include/wx-2.8/wx/string.h
	"wx/defs.h"
	<ctype.h>
	<stdio.h>
	<string.h>
	<stdarg.h>
	<limits.h>
	<string.h>
	<stdio.h>
	<stdarg.h>
	<limits.h>
	<stdlib.h>
	<strings.h>
	<StringMgr.h>
	"wx/wxchar.h"
	"wx/buffer.h"
	"wx/strconv.h"
	"wx/beforestd.h"
	<string>
	"wx/afterstd.h"
	"wx/arrstr.h"
	"wx/iosfwrap.h"

1259116434 /usr/local/include/wx-2.8/wx/buffer.h
	"wx/wxchar.h"
	<stdlib.h>

1259116434 /usr/local/include/wx-2.8/wx/strconv.h
	"wx/defs.h"
	"wx/wxchar.h"
	"wx/buffer.h"
	"typeinfo.h"
	<stdlib.h>
	"wx/fontenc.h"

1259116434 /usr/local/include/wx-2.8/wx/fontenc.h

1259116434 /usr/local/include/wx-2.8/wx/beforestd.h

1259116434 /usr/local/include/wx-2.8/wx/afterstd.h
	"wx/msw/winundef.h"

1259116434 /usr/local/include/wx-2.8/wx/arrstr.h
	"wx/defs.h"
	"wx/string.h"
	"wx/dynarray.h"

1259116434 /usr/local/include/wx-2.8/wx/dynarray.h
	"wx/defs.h"
	"wx/beforestd.h"
	<vector>
	<algorithm>
	"wx/afterstd.h"

1259116434 /usr/local/include/wx-2.8/wx/iosfwrap.h
	<iostream.h>
	<iosfwd>
	"wx/msw/winundef.h"

1259116434 /usr/local/include/wx-2.8/wx/msgout.h
	"wx/defs.h"
	"wx/wxchar.h"

1259116434 /usr/local/include/wx-2.8/wx/xti.h
	"wx/defs.h"
	"wx/memory.h"
	"wx/flags.h"
	"wx/string.h"
	"wx/arrstr.h"
	"wx/hashmap.h"
	"wx/log.h"
	"wx/intl.h"
	<typeinfo>
	"wx/dynarray.h"

1259116434 /usr/local/include/wx-2.8/wx/hashmap.h
	"wx/string.h"
	<unordered_map>
	<tr1/unordered_map>
	<ext/hash_map>
	<hash_map>
	<stddef.h>

1259116434 /usr/local/include/wx-2.8/wx/log.h
	"wx/defs.h"
	"wx/string.h"
	"wx/arrstr.h"
	<time.h>
	"wx/dynarray.h"
	"wx/iosfwrap.h"
	"wx/generic/logg.h"
	"wx/cocoa/log.h"

1259116435 /usr/local/include/wx-2.8/wx/generic/logg.h

1259116434 /usr/local/include/wx-2.8/wx/intl.h
	"wx/defs.h"
	"wx/string.h"
	"wx/fontenc.h"

1259116434 /usr/local/include/wx-2.8/wx/clntdata.h
	"wx/defs.h"
	"wx/string.h"
	"wx/hashmap.h"
	"wx/vector.h"

1259116434 /usr/local/include/wx-2.8/wx/vector.h
	"wx/defs.h"

1259116435 /usr/local/include/wx-2.8/wx/gdicmn.h
	"wx/defs.h"
	"wx/list.h"
	"wx/string.h"
	"wx/fontenc.h"
	"wx/hashmap.h"

(much longer than this)

I don't understand. Codeblocks is using gcc. I guess it does not use make? I remember with KDevelop it made configure.in files and makefile.am and makefile. I guess I will just use the wizard.