Examining the libcurl.pc file when I install my own build (curl 8.9.1)
I'm not sure it is correct, and I wonder if there are opinions here.
FYI, I'm on GNU/Linux and I'm building all libraries statically and
only installing the static versions, no shared libs.
As I understand the Libs: variable is shown if you run pkg-config with
--libs, and BOTH Libs: and Libs.private: are shown if you run
pkg-config with --libs --static.
So for example, if I have libfoo.pc:
Libs: -L${libdir} -lfoo
Libs.private: -pthread
then I get this result:
$ pkg-config --libs foo
-L/my/lib/path -lfoo
$ pkg-config --libs --static foo
-L/my/lib/path -lfoo -pthread
The libcurl.pc file seems strange to me because the libraries are all
repeated in Libs.private (and also the prerequisites are duplicated in
Requires.private):
Requires: zlib,libzstd,openssl
Requires.private: zlib,libzstd,openssl
Libs: -L${libdir} -lcurl -lssl -lcrypto -lssl -lcrypto -ldl -pthread -lzstd
-lzstd -lz -pthread
Libs.private: -lssl -lcrypto -lssl -lcrypto -ldl -pthread -lzstd -lzstd -lz
-pthread
This leads to a lot of duplication when --static is used:
$ pkg-config --libs --static libcurl
-L/my/lib/path -lcurl -lssl -lcrypto -lssl -lcrypto -ldl -pthread -lzstd -lz
-pthread -lssl -lcrypto -lssl -lcrypto -ldl -pthread -lzstd -lz -pthread -lz
-lzstd -pthread -lssl -lcrypto -ldl -pthread
I mean, in the grand scheme of things duplicating libraries is not a
big deal it just increases the link time a bit.
Is this something to be considered? Or "don't really care"?
Looking at the .pc.in file I didn't quite follow the uses of the
LIBCURL_NO_SHARED and LIBCURL_LIBS metavariables.
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