使用Windows和C编译器在64位系统上运行32位C代码

Question

I am trying to run ac code on my Windows laptop using the 64-bit MinGW compiler. There are a few lines in the beginning of the code that direct to other files such as:

#include <openssl/e_os2.h>

When compiling the code the following error shows up:

C:\MinGW\bin\openssl\apps>gcc s_server.c
s_server.c:21:27: fatal error: openssl/e_os2.h: No such file or directory
#include <openssl/e_os2.h>
                       ^
compilation terminated.

I made sure the files were in the correct locations, however the error still occurs. I am thinking the error occurs because I am running a 32-bit binary on a 64-bit system. Are there any ways to work around this issue given that I don't have a Linux system?

Answer 1

C:\MinGW\bin\openssl\apps>gcc s_server.c
s_server.c:21:27: fatal error: openssl/e_os2.h: No such file or directory
#include <openssl/e_os2.h>
                       ^
compilation terminated.

I believe you need a -I argument during compile. The headers are not located in the apps/ directory. Instead, they are located at ../include/ (relative to apps/ ).

So maybe a compile command like:

# from apps/ directory
gcc -I ../include/ s_server.c

You will probably have additional problems because you need to link against libssl and libcrypto . Be aware you will still have work to do.

---

Here is what it looks like on Linux:

openssl$ find . -name e_os2.h
./include/openssl/e_os2.h

openssl$ cd apps

apps$ ls ../include/openssl/e_os2.h
../include/openssl/e_os2.h

Since the relative path is ../include/openssl/e_os2.h and the source file #include "openssl/e_os2.h" , you only need to include ../include using -I .

---

I am running a 32-bit binary on a 64-bit system...

You need to build OpenSSL as 32-bit. Run ./Configure LIST to get a list of MinGW targets. Then, configure with the appropriate triplet.

You may need to add -m32 to the command line for your program.