X86 64平台gcc编译32位的问题

osmanthusgfy

我想在X86 64平台用gcc编译32位的程序,

Makefile如下:

1. 
   
2. CFLAGS = $(ARCHFLAGS)
   
3. CXXFLAGS = $(ARCHFLAGS)
   
4. CPPFLAGS = $(ARCHFLAGS)
   
5. LDFLAGS = $(ARCHFLAGS)
   
6. OBJCFLAGS = $(ARCHFLAGS)
   
7. OBJCXXFLAGS = $(ARCHFLAGS)
   
8. 
   
9. CXXFLAGS = -m32 -march=i386 -mtune=i386 -msse2 -O2  -g -Wall -fmessage-length=0
   
10. 
    
11. ARCH_FLAGS = -arch i386
    
12. 
    
13. OBJS = Obj/Main.o
    
14. 
    
15. TARGET = App/aa
    
16.        
    
17. Obj/Main.o: Src/Main.cc
    
18.         $(CXX) $(CXXFLAGS) -c -o Obj/Main.o Src/Main.cc
    
19. 
    
20. $(TARGET):        $(OBJS)
    
21.         $(CXX) -o  $(TARGET) $(OBJS) $(LDFLAGS) $(LIBS)
    
22. 
    
23. all:        $(TARGET)
    
24. 
    
25. clean:
    
26.         rm -f $(OBJS) $(TARGET)
    

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可以编译,但是在链接的时候报错:

1. 
   
2. ld: warning: in Obj/Main.o, file was built for i386 which is not the architecture being linked (x86_64)
   

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请问应该怎么解决?谢谢!!!

oooooxxxxx

link的时候不要忘记-m32这个参数。

zylthinking

似乎链接的是64位的库， 如果没有第三放库， 检查以下crt 吧

hokuhouhi

-arch i386
-march=i386 -mtune=i386
是不是得改改~~

hokuhouhi

i386 (Intel), do you really want to install gentoo on that ? CHOST="i386-pc-linux-gnu" CFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=i386 -O3 -pipe -fomit-frame-pointer"
i486 (Intel), do you really want to install gentoo on that ? CHOST="i486-pc-linux-gnu" CFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=i486 -O3 -pipe -fomit-frame-pointer"
Pentium 1 (Intel) CHOST="i586-pc-linux-gnu" CFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium -O3 -pipe -fomit-frame-pointer"
Pentium MMX (Intel) CHOST="i586-pc-linux-gnu" CFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium-mmx -O3 -pipe -fomit-frame-pointer"
Pentium PRO (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentiumpro -O3 -pipe -fomit-frame-pointer"
Pentium II (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"
Celeron (Mendocino), aka Celeron1 (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium2 -O3 -pipe -fomit-frame-pointer"
Pentium III (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"
Celeron (Coppermine) aka Celeron2 (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer"
Celeron (Willamette?) (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"
Pentium 4 (Intel) CHOST="i686-pc-linux-gnu" CFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=pentium4 -O3 -pipe -fomit-frame-pointer"
Eden C3/Ezra (Via) CHOST="i586-pc-linux-gnu" CFLAGS="-march=i586 -m3dnow -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=i586 -m3dnow -O3 -pipe -fomit-frame-pointer"
quote : the ezra doesn't have any special instructions that you could optimize for, just consider is a K6-3...basically a p2 with 3dnow
K6 (AMD) CHOST="i586-pc-linux-gnu" CFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=k6 -O3 -pipe -fomit-frame-pointer"
K6-2 (AMD) CHOST="i586-pc-linux-gnu" CFLAGS="-march=k6-2 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=k6-2 -O3 -pipe -fomit-frame-pointer"
K6-3 (AMD) CHOST="i586-pc-linux-gnu" CFLAGS="-march=k6-3 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=k6-3 -O3 -pipe -fomit-frame-pointer"
Athlon (AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon -O3 -pipe -fomit-frame-pointer"
Athlon-tbird, aka K7 (AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon-tbird -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon-tbird -O3 -pipe -fomit-frame-pointer"
Athlon-tbird XP (AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
Athlon 4(AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon-4 -O3 -pipe -fomit-frame-pointer"
Athlon XP (AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon-xp -O3 -pipe -fomit-frame-pointer"
Athlon MP (AMD) CHOST="i686-pc-linux-gnu" CFLAGS="-march=athlon-mp -O3 -pipe -fomit-frame-pointer" CXXFLAGS="-march=athlon-mp -O3 -pipe -fomit-frame-pointer"
603 (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
603e (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
604 (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
604e (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
750 aka as G3 (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-mcpu=750 -O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-mcpu=750 -O3 -pipe -fomit-frame-pointer -fsigned-char"
Note: do not use -march=
7400, aka G4 (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-mcpu=7400 -O3 -pipe -fomit-frame-pointer -fsigned-char -maltivec" CXXFLAGS="-mcpu=7400 -O3 -pipe -fomit-frame-pointer -fsigned-char -maltivec"
Note: do not use -march=
7450, aka G4 second generation (PowerPC) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-mcpu=7450 -O3 -pipe -fomit-frame-pointer -fsigned-char -maltivec" CXXFLAGS="-mcpu=7450 -O3 -pipe -fomit-frame-pointer -fsigned-char -maltivec"
Note: do not use -march=
PowerPC (If you don't know which one) CHOST="powerpc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char" CXXFLAGS="-O3 -pipe -fomit-frame-pointer -fsigned-char"
Sparc CHOST="sparc-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer" CXXFLAGS="-O3 -pipe -fomit-frame-pointer"
Sparc 64 CHOST="sparc64-unknown-linux-gnu" CFLAGS="-O3 -pipe -fomit-frame-pointer" CXXFLAGS="-O3 -pipe -fomit-frame-pointer"

hokuhouhi

貌似不同处理器是不同的，你看看吧~~

osmanthusgfy

-arch i386
-march=i386 -mtune=i386
是不是得改改~~
hokuhouhi 发表于 2011-08-26 11:32

要改什么?
-arch i386等同于-march=i386
-mtune=i386 是指定cpu类型的.

osmanthusgfy

貌似不同处理器是不同的，你看看吧~~
hokuhouhi 发表于 2011-08-26 11:36

我就是想在64位x86上编译32位的程序.

osmanthusgfy

link的时候不要忘记-m32这个参数。
oooooxxxxx 发表于 2011-08-26 11:55

那怎么在Makefile写了?
我试了在生成TARGET时加上-m32不行:

1. 
   
2. $(TARGET):        $(OBJS)
   
3.         $(CXX) -m32 -o  $(TARGET) $(OBJS) $(LIBS)
   

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那link时,Makefile到底应该怎么写了?
谢谢!!!

pagx

-L/usr/lib32 -B/usr/lib32