Re: lt_dlopen an uninstalled library

On 21-11-22 23:33, ilya Basin wrote:
  | Hi List.
  | I'm making a program with plugins as shared libraries and when I run
  | `make check` I want my program to load the uninstalled plugins using
  | lt_dlopen().
  | 
  | I expected that passing `-dlopen libname.la` to libtool would force
  | the generation of a wrapper script setting the proper
  | LD_LIBRARY_PATH (just like regular linking with a shared .la does).
  | However, an ELF binary is generated and and attempt to call
  | lt_dlopen("libname.la") fails with "File not found". It only
  | succeeds if the filename contains "./.libs/". What am I doing wrong?


I think you'll find it's less hassle to extend your testsuite setup to
install the library into the testsuite working area before performing
other tests, using a "make DESTDIR=working/area/some/subdir install".
I do this for other components too, such as python extension shared
libraries.

Then just set your LD_LIBRARY_PATH, PYTHONPATH (etc) to the
relevant testsuite working area, before running the other tests.


  | 
  | Makefile.am:
  | 
  |     bin_PROGRAMS = purplecat
  |     purplecat_SOURCES = main.c
  |     
  |     purplecat_LDADD = \
  |     	-dlopen libpurplecat.la \
  |     	-lltdl \
  |     	$(MY_NULL)
  |     
  |     lib_LTLIBRARIES = libpurplecat.la
  |     
  |     libpurplecat_la_SOURCES = \
  |     	purplecat.h \
  |     	purplecat.c \
  |     	$(MY_NULL)
  |     
  |     libpurplecat_la_LDFLAGS = -module
  | 
  | 
  | main.c:
  | 
  |     int main(int argc, char *argv[]) {
  |     	static const char *filename = "libpurplecat";
  |     	static int (*p_pcat_main)(int argc, char *argv[]);
  |     	int res;
  |     	lt_dlinit();
  |     	lt_dlhandle handle = lt_dlopenext(filename);
  |     	if (!handle) {
  |     		fprintf(stderr, "Failed to load '%s': %s\n", filename, lt_dlerror());
  |     		return 1;
  |     	}
  |     	p_pcat_main = lt_dlsym(handle, "pcat_main");
  |     	res = p_pcat_main(argc, argv);
  |     	lt_dlclose(handle);
  |     	return res;
  |     }
  | 



regards,
Luke.