We accidentally flipped the meaning of LBT_USE_RTLD_DEEPBIND

Add test for `LBT_USE_RTLD_DEEPBIND`

Author: staticfloat

src/libblastrampoline.c

@@ -415,17 +415,15 @@ __attribute__((constructor)) void init(void) {
         printf("libblastrampoline initializing from %s\n", lookup_self_path());
     }
 
-#if !defined(LBT_DEEPBINDLESS)
     // If LBT_USE_RTLD_DEEPBIND == "0", we avoid using RTLD_DEEPBIND on a
     // deepbind-capable system.  This is mostly useful for sanitizers, which
     // abhor such library loading shenanigans.
-    if (env_match_bool("LBT_USE_RTLD_DEEPBIND", 1)) {
+    if (!env_match_bool("LBT_USE_RTLD_DEEPBIND", 1)) {
         use_deepbind = 0x00;
         if (verbose) {
             printf("LBT_USE_RTLD_DEEPBIND=0 detected; avoiding usage of RTLD_DEEPBIND\n");
         }
     }
-#endif // !defined(LBT_DEEPBINDLESS)
 
     if (env_match_bool("LBT_STRICT", 0)) {
         if (verbose) {

test/runtests.jl

@@ -142,6 +142,15 @@ lbt_dir = joinpath(lbt_dir, binlib)
         run_test(cdotc_fail, blastrampoline_link_name(), libdirs, openblas_interface, OpenBLAS_jll.libopenblas_path)
     end
     =#
+
+    withenv("LBT_USE_RTLD_DEEPBIND" => "false") do
+        dgemm_deepbindless = (
+            "dgemm_test",
+            ("||C||^2 is:  24.3384", "avoiding usage of RTLD_DEEPBIND"),
+            true,
+        )
+        run_test(dgemm_deepbindless, blastrampoline_link_name(), libdirs, openblas_interface, OpenBLAS_jll.libopenblas_path)
+    end
 end
 
 # And again, but this time with OpenBLAS32_jll