diff --git a/flang/module/__fortran_ieee_exceptions.f90 b/flang/module/__fortran_ieee_exceptions.f90
--- a/flang/module/__fortran_ieee_exceptions.f90
+++ b/flang/module/__fortran_ieee_exceptions.f90
@@ -54,33 +54,33 @@
   G##_a2, G##_a3, G##_a4, G##_a8, G##_a10, G##_a16
 
   interface ieee_get_flag
-    elemental subroutine ieee_get_flag(flag, flag_value)
+    elemental subroutine ieee_get_flag_0(flag, flag_value)
       import ieee_flag_type
       type(ieee_flag_type), intent(in) :: flag
       logical, intent(out) :: flag_value
-    end subroutine ieee_get_flag
+    end subroutine ieee_get_flag_0
   end interface
 
   interface ieee_get_halting_mode
-    elemental subroutine ieee_get_halting_mode(flag, halting)
+    elemental subroutine ieee_get_halting_mode_0(flag, halting)
       import ieee_flag_type
       type(ieee_flag_type), intent(in) :: flag
       logical, intent(out) :: halting
-    end subroutine ieee_get_halting_mode
+    end subroutine ieee_get_halting_mode_0
   end interface
 
   interface ieee_get_modes
-    subroutine ieee_get_modes(modes)
+    subroutine ieee_get_modes_0(modes)
       import ieee_modes_type
       type(ieee_modes_type), intent(out) :: modes
-    end subroutine ieee_get_modes
+    end subroutine ieee_get_modes_0
   end interface
 
   interface ieee_get_status
-    subroutine ieee_get_status(status)
+    subroutine ieee_get_status_0(status)
       import ieee_status_type
       type(ieee_status_type), intent(out) :: status
-    end subroutine ieee_get_status
+    end subroutine ieee_get_status_0
   end interface
 
 #define IEEE_SET_FLAG_L(FVKIND) \
@@ -110,17 +110,17 @@
 #undef IEEE_SET_HALTING_MODE_L
 
   interface ieee_set_modes
-    subroutine ieee_set_modes(modes)
+    subroutine ieee_set_modes_0(modes)
       import ieee_modes_type
       type(ieee_modes_type), intent(in) :: modes
-    end subroutine ieee_set_modes
+    end subroutine ieee_set_modes_0
   end interface
-  
+
   interface ieee_set_status
-    subroutine ieee_set_status(status)
+    subroutine ieee_set_status_0(status)
       import ieee_status_type
       type(ieee_status_type), intent(in) :: status
-    end subroutine ieee_set_status
+    end subroutine ieee_set_status_0
   end interface
 
 #define IEEE_SUPPORT_FLAG_R(XKIND) \
@@ -130,20 +130,20 @@
     real(XKIND), intent(in) :: x(..); \
   end function ieee_support_flag_a##XKIND;
   interface ieee_support_flag
-    pure logical function ieee_support_flag(flag)
+    pure logical function ieee_support_flag_0(flag)
       import ieee_flag_type
       type(ieee_flag_type), intent(in) :: flag
-    end function ieee_support_flag
+    end function ieee_support_flag_0
     SPECIFICS_R(IEEE_SUPPORT_FLAG_R)
   end interface ieee_support_flag
   PRIVATE_R(IEEE_SUPPORT_FLAG)
 #undef IEEE_SUPPORT_FLAG_R
 
   interface ieee_support_halting
-    pure logical function ieee_support_halting(flag)
+    pure logical function ieee_support_halting_0(flag)
       import ieee_flag_type
       type(ieee_flag_type), intent(in) :: flag
-    end function ieee_support_halting
+    end function ieee_support_halting_0
   end interface
 
 end module __Fortran_ieee_exceptions
diff --git a/flang/module/ieee_arithmetic.f90 b/flang/module/ieee_arithmetic.f90
--- a/flang/module/ieee_arithmetic.f90
+++ b/flang/module/ieee_arithmetic.f90
@@ -190,10 +190,10 @@
     integer(RKIND), intent(in) :: radix; \
   end subroutine ieee_get_rounding_mode_i##RKIND;
   interface ieee_get_rounding_mode
-    subroutine ieee_get_rounding_mode(round_value)
+    subroutine ieee_get_rounding_mode_0(round_value)
       import ieee_round_type
       type(ieee_round_type), intent(out) :: round_value
-    end subroutine ieee_get_rounding_mode
+    end subroutine ieee_get_rounding_mode_0
     SPECIFICS_I(IEEE_GET_ROUNDING_MODE_I)
   end interface ieee_get_rounding_mode
   PRIVATE_I(IEEE_GET_ROUNDING_MODE)
@@ -418,10 +418,10 @@
     integer(RKIND), intent(in) :: radix; \
   end subroutine ieee_set_rounding_mode_i##RKIND;
   interface ieee_set_rounding_mode
-    subroutine ieee_set_rounding_mode(round_value)
+    subroutine ieee_set_rounding_mode_0(round_value)
       import ieee_round_type
       type(ieee_round_type), intent(in) :: round_value
-    end subroutine ieee_set_rounding_mode
+    end subroutine ieee_set_rounding_mode_0
     SPECIFICS_I(IEEE_SET_ROUNDING_MODE_I)
   end interface ieee_set_rounding_mode
   PRIVATE_I(IEEE_SET_ROUNDING_MODE)
@@ -514,10 +514,10 @@
     real(XKIND), intent(in) :: x(..); \
   end function ieee_support_rounding_a##XKIND;
   interface ieee_support_rounding
-    pure logical function ieee_support_rounding(round_value)
+    pure logical function ieee_support_rounding_0(round_value)
       import ieee_round_type
       type(ieee_round_type), intent(in) :: round_value
-    end function ieee_support_rounding
+    end function ieee_support_rounding_0
     SPECIFICS_R(IEEE_SUPPORT_ROUNDING_R)
   end interface ieee_support_rounding
   PRIVATE_R(IEEE_SUPPORT_ROUNDING)
diff --git a/flang/module/iso_fortran_env.f90 b/flang/module/iso_fortran_env.f90
--- a/flang/module/iso_fortran_env.f90
+++ b/flang/module/iso_fortran_env.f90
@@ -147,13 +147,13 @@
   integer, parameter :: stat_unlocked_failed_image = FORTRAN_RUNTIME_STAT_UNLOCKED_FAILED_IMAGE
 
   interface compiler_options
-    character(len=80) function compiler_options()
-    end function compiler_options
+    character(len=80) function compiler_options_1()
+    end function compiler_options_1
   end interface compiler_options
 
   interface compiler_version
-    character(len=80) function compiler_version()
-    end function compiler_version
+    character(len=80) function compiler_version_1()
+    end function compiler_version_1
   end interface compiler_version
 
 end module iso_fortran_env