In fact, why is DYLD_FALLBACK_LIBRARY_PATH updated in src/solaris/bin/ java_md.c? Why not DYLD_LIBRARY_PATH? DYLD_LIBRARY_PATH should be preferred than DYLD_FALLBACK_LIBRARY_PATH. If the libjpeg.dylib is in DYLD_LIBRARY_PATH, it will be loaded instead of /usr/lib/libjpeg.dylib. Thanks Max On Jul 24, 2009, at 4:52 PM, Weijun Wang wrote:
Hi All
I've found something new.
It seems the dlopen() function in Mac is quite normal, but there are some problem inside OpenJDK.
I'm calling dlopen("libkrb5.dylib", RTLD_NOW) inside OpenJDK now and it returns NULL. However, if I manually set DYLD_LIBRARY_PATH or DYLD_FALLBACK_LIBRARY_PATH to /usr/lib, then it works.
So I printf the DYLD_FALLBACK_LIBRARY_PATH value, it is changed to something like jre/lib/i386:jre/lib:jre/../lib/i386. According to Apple doc, the default value of it should ~/lib:/usr/lib:/usr/local/lib. If OpenJDK wants to change it to something else, shouldn't it append the new value onto the old one?
So I suggest making these changes:
--- a/src/solaris/bin/java_md.c +++ b/src/solaris/bin/java_md.c @@ -443,6 +443,9 @@ * variable. */ runpath = getenv(LD_LIBRARY_PATH); +#ifdef __APPLE__ + if (!runpath) runpath = "/usr/local/lib:/usr/lib"; +#endif #endif /* __solaris__ */
#if defined(__linux__) || defined(_ALLBSD_SOURCE)
Yes, the default runpath should also include "~/lib", omitted here for brevity.
Thanks Max
Max (Weijun) Wang wrote:
Hi All
I'm totally new to C programming on Mac.
On other systems I can call dlopen("libkrb5.so", RTLD_NOW) to return a non-NULL pointer to the library. However, on Mac, dlopen("libkrb5.dylib", RTLD_NOW) returns NULL even if I can see the / usr/lib/libkrb5.dylib is right there. What's wrong here?
Also, is there a way to write a cross-platform call? Say, dlopen_smart("krb5")?
I've found the JNI_LIB_NAME() macro. Nice.
Thanks Max