[gcc] how to statically link my program?

G00fy · 04-16-2006, 10:32 AM

Hi,

I made a program with the wxWidgets library. But I don't know how to statically link it to that library?

What I want to achieve is that all the wxWidgets library code is inside the executable (such as a .lib in Windows). All the other libraries can be dynamically linked. This is because I know if you run my program you will have all the X-libraries on your system... But I can't assume you have the wx-ones.

What I have done so far (and works great for dynamically linking):

Code:

EXECUTABLE=test
BUILDDIR=builddir

CC=gcc

CFLAGS=-c -Wall -I/usr/lib/wx/include/gtk2-unicode-release-static-2.7 -I/usr/include/wx-2.7 -O2 -D__WXGTK__ -D_UNICODE -fPIC

LDFLAGS=-pthread -L/usr/lib -s -lwx_gtk2u_adv-2.7 -lwx_gtk2u_core-2.7 -lwx_baseu_net-2.7 -lwx_baseu-2.7

SOURCES=$(wildcard *.cpp)
OBJECTS := $(patsubst %.cpp,$(BUILDDIR)/%.o,$(SOURCES))




all: BUILDDIR_CREATION $(SOURCES) $(EXECUTABLE)

BUILDDIR_CREATION:
	if [ ! -d $(BUILDDIR) ]; then mkdir -p $(BUILDDIR); fi

$(EXECUTABLE): $(OBJECTS) 
	$(CC) $(LDFLAGS) $(OBJECTS) -o $@
	upx --best $@

$(BUILDDIR)/%.o: %.cpp
	$(CC) $(CFLAGS) $< -o $@

clean:
	if [ -d $(BUILDDIR) ]; then rm -Rf $(BUILDDIR); fi

distclean: clean
	rm -f *~
	rm -f $(EXECUTABLE)

This works fine as far as dynamically linking is involved.

Now I tried to find where I can look something up about static linking, and they all say "add the libraries to the end (after the -o) when linking. So I tried, but no avail. Also I read you need to use the flag '-static', but this even generates more errors about missing stuff (like missing 'delete' function and so on?!).

Is there someone who can help me with this problem?

Thanks

traene · 04-16-2006, 12:19 PM

I am not quite sure, but what should work will be adding the library as a object
file to the linker. For this, give the path to the static library, when calling
the linker:

Code:

STATIC_OBJ= /usr/lib/libwx_gtk2u_adv-2.7.a

[...]

$(EXECUTABLE): $(OBJECTS) 
	$(CC) $(LDFLAGS) $(OBJECTS) $(STATIC_OBJ) -o $@
	upx --best $@

G00fy · 04-16-2006, 12:37 PM

I tried that too, but then the amount of errors went from 0 (links ok) -> 4800... [putting the static_obj before the objects] to 11700 [putting the static_obj after the objects].

But I am also seeing that if I put it there, it's not complaining about any wx-functions anymore... Only about some STL-functions? Which library should I include to counter that?

Thanks.

**EDIT** Adding all the default libraries where wxWidgets was compiled with (probably dynamically linked) to the LDFLAGS got me compiling the thing

.

Thanks again!

FinalFantasy · 04-16-2006, 02:32 PM

CC=gcc
->
CC=gcc -static

have a try.

G00fy · 04-16-2006, 02:52 PM

Nope

What I have now is:

Code:

LDFLAGS=-pthread -L/usr/lib -lstdc++ -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lm -lfontconfig -lXinerama -lXi -lXrandr -lXext -lXcursor -lXfixes -lpango-1.0 -lXrender -lX11 -lgobject-2.0 -lgmodule-2.0 -ldl -lgthread-2.0 -lglib-2.0 -lXinerama -lpng -lz -ljpeg -ltiff

STATOBJS=/usr/lib/libwx_gtk2u_adv-2.7.a /usr/lib/libwx_gtk2u_core-2.7.a /usr/lib/libwx_baseu_net-2.7.a /usr/lib/libwx_baseu-2.7.a

This links ok, and dynamically links to all the LDFLAGS-libraries, and statically links to the wx-ones (exactly what I needed).

Now when I add your -static switch, I get 11792 errors

.

Greetz

paulsm4 · 04-16-2006, 04:35 PM

Hi -

It sounds like you're squared away by specifying the full path name of your .a static libraries - cool.

But FYI, you can also alternate "-static" and "-dynamic" switches in the same link command, to specify you want certain libraries statically linked, and the rest dynamically linked.