1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/pr17706.f90 b/gcc/testsuite/gfortran.dg/pr17706.f90
new file mode 100644
index 000000000..5ddda3d35
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr17706.f90
@@ -0,0 +1,25 @@
+! { dg-do run }
+! { dg-options "-fno-sign-zero" }
+! PR17706
+! this is a libgfortran test
+! output value -0.00 is not standard compliant
+! derived from NIST F77 test FM406, with extra bits added.
+program pr17706
+  implicit none
+  character(len=10) :: s
+  character(len=10), parameter :: x = "xxxxxxxxxx"
+  real, parameter :: small = -0.0001
+
+  s = x
+  write (s, '(F4.1)') small
+  ! The plus is optional.  We choose not to display it.
+  if (s .ne. " 0.0") call abort
+
+  s = x
+  write (s, '(SS,F4.1)') small
+  if (s .ne. " 0.0") call abort
+
+  s = x
+  write (s, '(SP,F4.1)') small
+  if (s .ne. "+0.0") call abort
+end program