Date: Mon, 26 Apr 1999 14:22:57 -0500 (EST) From: Alfred Perlstein <bright@rush.net> To: Dan Moschuk <dan@trinsec.com> Cc: hackers@FreeBSD.ORG Subject: Re: dlopen() and family? Message-ID: <Pine.BSF.3.96.990426141757.2095w-100000@cygnus.rush.net> In-Reply-To: <19990426134633.A41603@trinsec.com>
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On Mon, 26 Apr 1999, Dan Moschuk wrote: > > Greetings, > > I'm having a small problem with using the dlopen() interface. More > specifically, I'm not entirely sure how to compile the shared objects. > > Here are the compile options and the errors I get: > > cc -aout -c > dlopen() -- Invalid file format > > cc -Wl,-export-dynamic > dlopen() -- mmap returned wrong address: wanted ... > > cc -c > dlopen() -- Unsupported file type er, why did you not give us the complete commandline you used? On my system: .(16:01:12)(bright@thumper.reserved) ~ % cc -aout -c cc: No input files specified .(16:01:17)(bright@thumper.reserved) ~ % cc -Wl,-export-dynamic /usr/lib/crt1.o: In function `_start': /usr/lib/crt1.o(.text+0x6c): undefined reference to `main' .(16:01:23)(bright@thumper.reserved) ~ % cc -c cc: No input files specified perhaps you missed the '-shared' flag? cc -shared -o blah.so.1 obj1.o obj2.o obj3.o you probably want to compiled the object files with: cc -c obj1.c -fpic -fPIC if you are compiling a program and want its local symbols visible to dlsym(), you need the -export-dynamic flag. -Alfred To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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