问题
I am currently trying to compile and link a 32 bit application on my Debian 64 bit, but it fails at link time.
The command I'm using (in my Makefile) to compile is:
gcc -Os -m32 -Wall -g -c $< -o $@
This seems to work.
Then I link with the following command:
gcc -m32 -lcurses $^ -o $@
This fails and gives the following errors:
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libcurses.so when searching for -lcurses
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../libcurses.a when searching for -lcurses
/usr/bin/ld: skipping incompatible /usr/lib/libcurses.so when searching for -lcurses
/usr/bin/ld: skipping incompatible /usr/lib/libcurses.a when searching for -lcurses
/usr/bin/ld: cannot find -lcurses
collect2: ld returned 1 exit status
What I've tried so far (usual solutions that I found elsewhere on the web) is:
- installing
gcc-multilib - installing
lib32ncurses5andlib32ncurses6dev - adding the option
-L/usr/lib32to the link command
Sadly, none of these has worked so far. I am running out of ideas. My last resort would be using a 32 bit system, but I'd like to avoid that if possible.
回答1:
There are two problems:
- Your link command is incorrect: the order of libraries on the link line matters. The command should be:
gcc -m32 $^ -o $@ -lcurses - Since you want to link against ncurses, make the last argument
-lncurses.
回答2:
The message shows gcc didn't find the 32bit of ncurse library.
A quick solution: looking on my machine (ubuntu 11.10) , I think should be
gcc -m32 -lncurses $^ -o $@ -v
Where the library is actually at /lib32/libncurses.so.5.9.
Generally, try if you encounter a problem.
gcc -m32 -lcurses $^ -o $@ -v
It'll print out a lot of stuff.
Look for parameters looks like -L, and try to find the library file (libfoo.so or libfoo.a) in the directory .
回答3:
You probably need the lib32ncurses5-dev package, or something similar, providing the 32 bits variant development package for ncurses.
来源：https://stackoverflow.com/questions/8197617/compiling-and-linking-a-32-bit-application-on-debian-64-bit