Dave Korn wrote:
Wrong reasoning. The actual problem is that you need to remove the 'lib'
prefix when supplying a library name:
g++ -o hello -L/lib hello.cpp -lcrypt
g++ -o hello -L/lib hello.cpp -lbfd
Ordinary .a files are for static linking, .dll.a files are for runtime
linking against dlls, gcc selects the right one for you by using one of the
-shared or -static flags.
Err, no. gcc (by default) will use .dll.a files in preference to .a
files -- more completely, the search pattern for -lxxx is, in each
directory:
libxxx.dll.a
xxx.dll.a
libxxx.a
xxx.lib
cygxxx.dll
libxxx.dll
xxx.dll
libxxx.a (again, for architectural reasons)
xxx (this is so that stuff like -lmyspecific.o will
work as expected).
before moving on to the next directory in the search path.
With -static, -lxxx only looks for:
libxxx.a
xxx
Note that, oddly, in -static mode a MS-style library name "xxx.lib" will
be ignored, while in (normal) mode it will be used if found (and the
other patterns ahead of it are not found). Just an odd little quirk.
-shared is something competely different. It means: make the output
file a DLL instead of an executable.
--
Chuck
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