BUG: test, fix NPY_VISIBILITY_HIDDEN on gcc, which becomes NPY_NO_EXPORT

2 files changed, 9 insertions, 2 deletions

diff --git a/numpy/core/setup.py b/numpy/core/setup.py
index efcacfb8e..23a9e268b 100644
--- a/numpy/core/setup.py
+++ b/numpy/core/setup.py
@@ -379,8 +379,9 @@ def check_mathlib(config_cmd):
 def visibility_define(config):
     """Return the define value to use for NPY_VISIBILITY_HIDDEN (may be empty
     string)."""
-    if config.check_compiler_gcc4():
-        return '__attribute__((visibility("hidden")))'
+    hide = '__attribute__((visibility("hidden")))'
+    if config.check_gcc_function_attribute(hide, 'hideme'):
+        return hide
     else:
         return ''
 
diff --git a/numpy/core/src/multiarray/_multiarray_tests.c.src b/numpy/core/src/multiarray/_multiarray_tests.c.src
index f05ee1431..2a8275572 100644
--- a/numpy/core/src/multiarray/_multiarray_tests.c.src
+++ b/numpy/core/src/multiarray/_multiarray_tests.c.src
@@ -2066,3 +2066,9 @@ init_multiarray_tests(void)
     }
     return RETVAL;
 }
+
+NPY_NO_EXPORT int
+test_not_exported(void)
+{
+    return 1;
+}