MinGW Linking GUI Program

[Ken Fitlike]

Sorry, that fails completely for me :

g++ -c -Wall .cpp
g++: .cpp: No such file or directory
g++: no input files
mingw32-make: *** [wurd.o] error 1

(same with msys make).

GNU Make 3.80

GNU Make version 3.79.1

g++.exe (GCC) 3.4.5 (mingw special)

edit: spoke too soon- I've had to tweak your makefile to replicate the error you have described:

CC = g++
LD = ld

LIBS = "C:\Program Files\Microsoft Platform SDK\Lib\gdi32.Lib" "C:\Program Files\Microsoft Platform SDK\Lib\kernel32.lib"

LDFLAGS  = --subsystem windows -e _WinMain@16 $(LIBS)
CXXFLAGS = -c -Wall

all: wurd

wurd: wurd.o
	$(LD) wurd.o -o wurd.exe $(LDFLAGS) 

wurd.o: wurd.cpp
	$(CC) $(CXXFLAGS) wurd.cpp

edit2: MessageBox is in user32.dll so requires linking with user32.lib; not that it removes the linker error...

[Tonto]

I have made some progress. I realized that the symbol information in the VC libraries have a different mangling than mingw's. Here are some examples:

USER32.dll:     file format pei-i386

SYMBOL TABLE:
[  0](sec  0)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$4
[  1](sec  1)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$5
[  2](sec  2)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$6
[  3](sec  3)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .text
[  4](sec  1)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __imp__wsprintfA
[  5](sec  3)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 _wsprintfA
[  6](sec  0)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __IMPORT_DESCRIPTOR_USER32



USER32.dll:     file format pei-i386

SYMBOL TABLE:
[  0](sec  0)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$4
[  1](sec  1)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$5
[  2](sec  2)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .idata$6
[  3](sec  3)(fl 0x00)(ty   0)(scl   3) (nx 0) 0x00000000 .text
[  4](sec  1)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __imp__wsprintfW
[  5](sec  3)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 _wsprintfW
[  6](sec  0)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __IMPORT_DESCRIPTOR_USER32

They do not have the appending number of argument bytes. With mingw's libs, I can do what I want when I say:

LIBPATH   = "C:/Development/Dev/lib"
LIBS      = -l gdi32.a -l kernel32.a -l user32.a -l ws2_32.a

Those forward slashes are needed. I am also trying to link to the standard library now, and am encountering some more errors. My makefile, with needed things to link

LIBPATH   = -L"C:/development/dev/lib" \
			-L"C:/development/dev/lib/gcc/mingw32/3.4.2"

LIBS      = -lgdi32 -lkernel32 -luser32 \
			-lws2_32 -lstdc++ -lcrtdll \
			-lmingw32 -lgcc

LDFLAGS  = --subsystem windows $(LIBPATH) $(LIBS)

test: test.o util.o
	$(LD) C:\Development\Dev\lib\crt1.o test.o util.o -o test.exe $(LDFLAGS)

I get many errors from like

ld C:\Development\Dev\lib\crt1.o test.o util.o -o test.exe --subsystem windows -L"C:/development/dev/lib" -L"C:/development/dev/lib/gcc/mingw32/3.4.2"
 -lgdi32 -lkernel32 -luser32 -lws2_32 -lstdc++ -lcrtdll -lmingw32 -lgcc
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x28):eh_globals.cc: undefined reference to `_imp__TlsAlloc@0'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x58):eh_globals.cc: undefined reference to `_imp__GetLastError@0'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0xe4):eh_globals.cc: undefined reference to `_imp__GetLastError@0'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0xf5):eh_globals.cc: undefined reference to `_imp__TlsGetValue@4'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x107):eh_globals.cc: undefined reference to `_imp__SetLastError@4'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x19e):eh_globals.cc: undefined reference to `_imp__GetLastError@0'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x1af):eh_globals.cc: undefined reference to `_imp__TlsGetValue@4'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x1c1):eh_globals.cc: undefined reference to `_imp__SetLastError@4'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x289):eh_globals.cc: undefined reference to `InterlockedIncrement@4'
C:/development/dev/lib/libstdc++.a(eh_globals.o)(.text+0x2a5):eh_globals.cc: undefined reference to `_imp__Sleep@4'
...
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x178): undefined reference to `_imp__GetLastError@0'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x1be): undefined reference to `_imp__CreateSemaphoreA@16'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x1de): undefined reference to `InterlockedIncrement@4'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x201): undefined reference to `_imp__WaitForSingleObject@8'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x210): undefined reference to `InterlockedDecrement@4'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x23e): undefined reference to `InterlockedDecrement@4'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(gthr-win32.o)(.text+0x262): undefined reference to `_imp__ReleaseSemaphore@12'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(_eprintf.o)(.text+0x2e): undefined reference to `fprintf'
C:/development/dev/lib/gcc/mingw32/3.4.2/libgcc.a(_eprintf.o)(.text+0x3e): undefined reference to `fflush'
make: *** [test] Error 1

[Ken Fitlike]

If you use the -v or --verbose flags when linking/compiling you'll get a lot more information about those processes, which may be of some use to you.

Interestingly, if you don't invoke ld directly the issue of mangling you describe doesn't seem to be a problem; it seems that when you invoke ld directly as you are attempting to do, you have to specify just about everything and anything, including taking care that the order of switches etc. is correct.

Good luck, though.

[Tonto]

Very helpful I think! So close! Makefile

LIBPATH   = -L"c:/development/dev/lib" \
			-L"c:/development/dev/lib/gcc/mingw32/3.4.2"

LIBS      = -lstdc++ -lmingw32 -lgcc -lmsvcrt -luser32 -lkernel32

OBJS      = test.o util.o c:/development/dev/lib/crt1.o \
            c:/development/dev/lib/gcc/mingw32/3.4.2/crtbegin.o \
			c:/development/dev/lib/gcc/mingw32/3.4.2/crtend.o

LDFLAGS   = --subsystem windows $(LIBPATH) $(LIBS)

Errors:

test.o(.text+0x15c):test.cpp: undefined reference to `GetStockObject@4'
c:/development/dev/lib/crt1.o(.text+0x13d):crt1.c: undefined reference to `__GetMainArgs'
c:/development/dev/lib/crt1.o(.text+0x1b7):crt1.c: undefined reference to `_imp___fmode_dll'
c:/development/dev/lib/crt1.o(.text+0x1c7):crt1.c: undefined reference to `_imp___environ_dll'
make: *** [test] Error 1

[Tonto]

It works.

LIBPATH   = -L"c:/development/dev/lib" \
			-L"c:/development/dev/lib/gcc/mingw32/3.4.2"

LIBS      = -lstdc++ -lmingw32 -lgcc -lmsvcrt -luser32 -lkernel32 -lgdi32 \
			-lcrtdll

OBJS      = test.o util.o c:/development/dev/lib/crt1.o \
            c:/development/dev/lib/gcc/mingw32/3.4.2/crtbegin.o \
			c:/development/dev/lib/gcc/mingw32/3.4.2/crtend.o

LDFLAGS   = --subsystem windows $(LIBPATH) $(LIBS)

Fun fun fun fun fun in the sun.