1 files changed, 8 insertions, 1 deletions
diff --git a/math/Versions b/math/Versions
index bd24fc6698..39c47626f6 100644
--- a/math/Versions
+++ b/math/Versions
@@ -94,7 +94,7 @@ libm {
   }
   GLIBC_2.1 {
     # mathematical functions
-    exp2; exp2f; exp2l;
+    exp2; exp2f; # exp2l; -- bug omitted this until GLIBC_2.4 (below)
     exp10; exp10f; exp10l;
     fdim; fdimf; fdiml;
     fma; fmaf; fmal;
@@ -161,4 +161,11 @@ libm {
     # fp environment function
     feenableexcept; fedisableexcept; fegetexcept;
   }
+  GLIBC_2.4 {
+    # A bug in sysdeps/generic/w_exp2.c kept this from appearing
+    # in GLIBC_2.1 as it should have on platforms using that
+    # implementation file.  On others, sysdeps/CPU/Versions now
+    # puts exp2l in GLIBC_2.1, which will override this entry.
+    exp2l;
+  }
 }