Hi,
I faced this problem when i try built a shared lib and linked it on
windows. The structure of my project as below:
-test_dir/
-sub_hello/
CMakeLists.txt
hello.c
-top/
main.c
CMakeLists.txt
CMakeLists.txt
The content of each file:
①test_dir/CMakeLists.txt:
PROJECT(TESTLIB)
add_subdirectory(sub_hello sub_hello)
add_subdirectory(top top)
②test_dir/sub_hello/CMakeLists.txt:
message("message from sub_hello")
add_library(hello_lib SHARED hello.c)
③test_dir/top/CMakeLists.txt:
include_directories(../sub_hello)
add_executable(main main.c)
target_link_libraries(main hello_lib)
④test_dir/sub_hello/hello.c：
#include <stdio.h>
void HelloFunc()
{
printf("###hello###\n");
}
⑤test_dir/top/main.c:
int main()
{
HelloFunc();
return 0;
}
After i cmake this project, generated .sln and .proj files, then i built it
and i get an error in vs:
Error LNK1104 can't open file "..\sub_hello\Debug\hello_lib.lib"
In folder ..\sub_hello\Debug\ , there was not a hello_lib.lib existed.
Then i look thorough and found a solution:
Add "set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS YES)" in file
test_dir/sub_hello/hello.c
Then i built this solution again, this time it success, and hello_lib.lib
and main.exe was generated. But when i try to run main.exe, an error
occured: "lose hello_lib.dll". And i moved hello_lib.dll into the folder of
main.exe, and it worked well.
There are two questions i could not figure out:
①Is this "..\sub_hello\Debug\hello_lib.lib" associates with
"..\sub_hello\Debug\hello_lib.dll"? For windows can not use .dll directly,
and use a .lib to record the .dll's entrance and location.
②How to solve the problem of main.exe can not find .dll file.
Best regards,
Chao Zhang
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