强制静态链接链接到 Xcode 目标的库？

Question

My Xcode target links against hdf5 library (using the Link Binary with Libraries build phase). libhdf5 is installed using MacPorts, thus /opt/local/lib contains both the dynamic (.dylib) and static (.a) versions of the library.

The text output from the build shows that there is, as expected, a -lhdf5 in the linking step of the build. gcc seems to take the dynamic linked library over the static, however. Is there any way to force gcc (via a compiler switch or via Xcode) to statically link with libhdf5.a?

The only solution I've found is to copy libhdf5.a to the project (or other) directory and link against that copy, thus avoiding having dynamic and static versions in the same location.

Answer 1

Had this exact same problem and despite this being an old post, I thought I'd share what I had to do to make this work.

Usually you do just provide the switch '-static' to the linker however, with Xcode this causes all libs including the crt to be linked statically. I got the error:

can't locate file for: -lcrt0.o

When I tried this.

The thing which worked for me was to replace:

-lmylib

with

/path/to/libmylib.a

Note: the -l is dropped.

Answer 2

回应您对 Eduard Wirch 回答的评论：如果您将 -lhdf5 替换为 -l/full/path/to/libhdf5.a，您还可以仅控制该库的静态链接

Answer 3

My case with Xcode 4.5:

When I drag and drop a static C library (a 3rd party library compiled with GNU Autotools) to project's frameworks ( Project Navigator > Frameworks ) the linker seems to thinks that's a dynamic library and adds -L -l flags:

-L/path/to/libfoodir -lfoo

The linking fails because there is no /path/to/libfoodir/libfoo.dylib . The linker command can be seen from:

Log Navigator > select a Build log > select a Link line and expand it

The linking succeeds when I add a full path ( /path/to/libfoodir/libfoo.a ) to the linker settings:

Targets > Build Settings (all) > Other linker flags

Answer 4

使用“-static”开关进行链接： GCC 链接选项

Answer 5

Under XCode 11.3.1, targeting MacOS

Tried to add absolute lib path to Other linker flags . But that doesn't work. So I copied required *.a files (ln -s may also work) to project dir and it worked like a charm.