Hello, Ralf; On 4/18/09, Ralf Wildenhues <ralf.wildenh...@gmx.de> wrote: >> cygwin simply refused to link the application. > Can you show the error you're getting under Cygwin? I couldn't reproduce it, sorry; I evidently mistook something. it builds well; the libraries are not opened when the application run.
> Can you try adding -no-undefined to the library link flags Yes, it fixed the sample (after removing comments from lib.sym): when shared libraries are not disabled, it loads the modules as expected. Thank you! > This build completes for me when I use --disable-shared. Indeed; yet I couldn't write a working example. I rewrote lib.c like this (http://ineiev.users.sourceforge.net/samples/dlpo-0.0.2.tar.gz): #include"lib.h" #include<stdio.h> #include<libltdl/ltdl.h> #if LIB_NO == 0 # define preloaded_symbols lt_lib0_LTX_preloaded_symbols # define init_lib init_lib0 # define LIB_NAME "lib0" #else # define preloaded_symbols lt_lib1_LTX_preloaded_symbols # define init_lib init_lib1 # define LIB_NAME "lib1" #endif extern const lt_dlsymlist*preloaded_symbols; void bar(void){printf("bar() from %s\n",LIB_NAME);} void foo(void){printf("foo() from %s: ",LIB_NAME);bar();} static const struct func_table funcs={bar,foo}; static int preload_callback(lt_dlhandle h){return 0;} const struct func_table* init_lib(void) { if(lt_dlpreload(&preloaded_symbols))return 0; lt_dlpreload_open (LIB_NAME, preload_callback); return &funcs; } I'm not quite sure where actions from init_lib() should be, in lib.c or in main(); in either case I had to put a declaration in the source. I also changed exported symbols list: from lib0 init_lib0 is exported, from lib1 --- init_lib1. This resulted in libtool: link: gcc -g -O2 .libs/dlpoS.o -o dlpo dlpo-dlpo.o ./.libs/lib0.a ./.libs/lib1.a /home/dti/libtool/lib/libltdl.so -ldl -Wl,-rpath -Wl,/home/dti/libtool/lib -Wl,-rpath -Wl,/home/dti/libtool/lib ./.libs/lib1.a(lib1_la-lib.o)(.text+0x0): In function `bar': ../m/lib.c:16: multiple definition of `bar' ./.libs/lib0.a(lib0_la-lib.o)(.text+0x0):../m/lib.c:16: first defined here ./.libs/lib1.a(lib1_la-lib.o)(.text+0x1c): In function `foo': ../m/lib.c:18: multiple definition of `foo' ./.libs/lib0.a(lib0_la-lib.o)(.text+0x1c):../m/lib.c:18: first defined here ./.libs/lib0.a(lib0_la-lib.o)(.text+0x4b): In function `init_lib0': lib.c: undefined reference to `lt_lib0_LTX_preloaded_symbols' ./.libs/lib1.a(lib1_la-lib.o)(.text+0x4b): In function `init_lib1': lib.c: undefined reference to `lt_lib1_LTX_preloaded_symbols' collect2: ld returned 1 exit status libtool: link: rm -f ".libs/dlpoS.o" The multiple definitions were probably expected, but undefined references mean I did something wrong; I couldn't figure out what from the info file. Thanks, Ineiev _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
