replace/dlfcn.m4

   1 dnl dummies provided by dlfcn.c if not available
   2 save_LIBS="$LIBS"
   3 LIBS=""
   4
   5 libreplace_cv_dlfcn=no
   6 AC_SEARCH_LIBS(dlopen, dl)
   7
   8 AC_CHECK_HEADERS(dlfcn.h)
   9 AC_CHECK_FUNCS([dlopen dlsym dlerror dlclose],[],[libreplace_cv_dlfcn=yes])
  10
  11 libreplace_cv_shl=no
  12 AC_SEARCH_LIBS(shl_load, sl)
  13 AC_CHECK_HEADERS(dl.h)
  14 AC_CHECK_FUNCS([shl_load shl_unload shl_findsym],[],[libreplace_cv_shl=yes])
  15
  16 AC_VERIFY_C_PROTOTYPE([void *dlopen(const char* filename, unsigned int flags)],
  17         [
  18         return 0;
  19         ],[
  20         AC_DEFINE(DLOPEN_TAKES_UNSIGNED_FLAGS, 1, [Whether dlopen takes unsigned int flags])
  21         ],[],[
  22         #include <dlfcn.h>
  23         ])
  24
  25 if test x"${libreplace_cv_dlfcn}" = x"yes";then
  26         LIBREPLACEOBJ="${LIBREPLACEOBJ} dlfcn.o"
  27 fi
  28
  29 LIBDL="$LIBS"
  30 AC_SUBST(LIBDL)
  31 LIBS="$save_LIBS"