Date: Sat, 3 Nov 2018 16:47:37 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: freebsd-hackers@FreeBSD.org Subject: Re: help with dl module and clang Message-ID: <E3B4CDF3-2DE9-4785-963C-9158105C263E@FreeBSD.org> In-Reply-To: <4B8101F4-9A89-4486-8DF3-93DC799EF6D4@cs.huji.ac.il> References: <4B8101F4-9A89-4486-8DF3-93DC799EF6D4@cs.huji.ac.il>
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[-- Attachment #1 --] On 3 Nov 2018, at 15:51, Daniel Braniss <danny@cs.huji.ac.il> wrote: > > I have a program that loads some modules via dlopen(), these modules call some routines > which are in the main program, this works when using gcc, but with cc it does not. > > when compiling the main program I use -export-dynamic, and the modules link fine when compiled with > gcc, but when compiling with clang/cc i get dlerror: ...Undefined symbol … > BTW, when linking the main program with cc I get > /usr/bin/ld: warning: cannot find entry symbol xport-dynamic; defaulting to 0000000000402140 Instead of using -export-dynamic (which is a linker flag) as a flag to cc, try using -Wl,-export-dynamic instead. Now, the linker interprets this as the -e flag, which is something totally different. I think this will also help with the exporting of the symbols of your main program. -Dimitry [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 iF0EARECAB0WIQR6tGLSzjX8bUI5T82wXqMKLiCWowUCW93DGQAKCRCwXqMKLiCW o9O0AJ9tC96/mSUaHKoTaHuqd4Ar0Ss+NgCg6zU4kLcbNNKUgIbJm8zNw3dqlZQ= =nIL3 -----END PGP SIGNATURE-----help
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