diff --git a/DAMASK_prerequisites.sh b/DAMASK_prerequisites.sh
index 4334afd92..12dd9bd07 100755
--- a/DAMASK_prerequisites.sh
+++ b/DAMASK_prerequisites.sh
@@ -119,7 +119,7 @@ echo
 echo ==============================================================================================
 echo MPI Wrappers
 echo ==============================================================================================
-for executable in mpicc mpiCC mpic++ mpicxx mpifort mpif90 mpif77; do
+for executable in mpicc mpiCC mpic++ mpicpc mpicxx mpifort mpif90 mpif77; do
   getDetails $executable '-show'
 done
 echo
diff --git a/src/CPFEM.f90 b/src/CPFEM.f90
index b3848a9eb..44e7e5693 100644
--- a/src/CPFEM.f90
+++ b/src/CPFEM.f90
@@ -113,7 +113,7 @@ end subroutine CPFEM_initAll
 !> @brief allocate the arrays defined in module CPFEM and initialize them
 !--------------------------------------------------------------------------------------------------
 subroutine CPFEM_init
-#ifdef __GFORTRAN__
+#if __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/CPFEM2.f90 b/src/CPFEM2.f90
index 0ac916046..aa2615b5f 100644
--- a/src/CPFEM2.f90
+++ b/src/CPFEM2.f90
@@ -82,7 +82,7 @@ end subroutine CPFEM_initAll
 !> @brief allocate the arrays defined in module CPFEM and initialize them
 !--------------------------------------------------------------------------------------------------
 subroutine CPFEM_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/DAMASK_spectral.f90 b/src/DAMASK_spectral.f90
index f32bfb7b3..e84ead9cc 100644
--- a/src/DAMASK_spectral.f90
+++ b/src/DAMASK_spectral.f90
@@ -7,7 +7,7 @@
 !> results
 !--------------------------------------------------------------------------------------------------
 program DAMASK_spectral
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/FEsolving.f90 b/src/FEsolving.f90
index 5fdb2ebf8..92feaa926 100644
--- a/src/FEsolving.f90
+++ b/src/FEsolving.f90
@@ -43,7 +43,7 @@ contains
 !> solver the information is provided by the interface module
 !--------------------------------------------------------------------------------------------------
 subroutine FE_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/IO.f90 b/src/IO.f90
index a6c3a7da8..0df8f171f 100644
--- a/src/IO.f90
+++ b/src/IO.f90
@@ -82,7 +82,7 @@ contains
 !> @brief only outputs revision number
 !--------------------------------------------------------------------------------------------------
 subroutine IO_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/compilation_info.f90 b/src/compilation_info.f90
index 3fc12f1ee..f0ca4d4cc 100644
--- a/src/compilation_info.f90
+++ b/src/compilation_info.f90
@@ -1,8 +1,7 @@
-#ifdef __GFORTRAN__
-  write(6,*) 'Compiled with ', compiler_version() !not supported by and ifort <= 15 (and old gfortran)
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
+  write(6,*) 'Compiled with ', compiler_version()
   write(6,*) 'With options  ', compiler_options()
-#endif 
-#ifdef __INTEL_COMPILER
+#else
   write(6,'(a,i4.4,a,i8.8)') ' Compiled with Intel fortran version ', __INTEL_COMPILER,&
                                                      ', build date ', __INTEL_COMPILER_BUILD_DATE
 #endif
diff --git a/src/constitutive.f90 b/src/constitutive.f90
index f124e545b..be9899d73 100644
--- a/src/constitutive.f90
+++ b/src/constitutive.f90
@@ -37,7 +37,7 @@ contains
 !> @brief allocates arrays pointing to array of the various constitutive modules
 !--------------------------------------------------------------------------------------------------
 subroutine constitutive_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/crystallite.f90 b/src/crystallite.f90
index 7f4f6fa44..a9f4c88cc 100644
--- a/src/crystallite.f90
+++ b/src/crystallite.f90
@@ -137,7 +137,7 @@ contains
 !> @brief allocates and initialize per grain variables
 !--------------------------------------------------------------------------------------------------
 subroutine crystallite_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/damage_local.f90 b/src/damage_local.f90
index 2f3014937..59956e7d1 100644
--- a/src/damage_local.f90
+++ b/src/damage_local.f90
@@ -41,7 +41,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine damage_local_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/damage_none.f90 b/src/damage_none.f90
index 4750f5949..a1f0f0cd5 100644
--- a/src/damage_none.f90
+++ b/src/damage_none.f90
@@ -16,7 +16,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine damage_none_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/damage_nonlocal.f90 b/src/damage_nonlocal.f90
index cd6ba8a5b..92ad183e1 100644
--- a/src/damage_nonlocal.f90
+++ b/src/damage_nonlocal.f90
@@ -46,7 +46,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine damage_nonlocal_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/debug.f90 b/src/debug.f90
index 396454c19..c4c3ddd60 100644
--- a/src/debug.f90
+++ b/src/debug.f90
@@ -102,7 +102,7 @@ contains
 !> @brief reads in parameters from debug.config and allocates arrays
 !--------------------------------------------------------------------------------------------------
 subroutine debug_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/homogenization.f90 b/src/homogenization.f90
index 5a30a72c8..7cc5fbd04 100644
--- a/src/homogenization.f90
+++ b/src/homogenization.f90
@@ -71,7 +71,7 @@ contains
 !> @brief module initialization
 !--------------------------------------------------------------------------------------------------
 subroutine homogenization_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/homogenization_RGC.f90 b/src/homogenization_RGC.f90
index 84cb594db..611268393 100644
--- a/src/homogenization_RGC.f90
+++ b/src/homogenization_RGC.f90
@@ -72,7 +72,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine homogenization_RGC_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/homogenization_isostrain.f90 b/src/homogenization_isostrain.f90
index 055bfbb46..b569e3737 100644
--- a/src/homogenization_isostrain.f90
+++ b/src/homogenization_isostrain.f90
@@ -49,7 +49,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine homogenization_isostrain_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/homogenization_none.f90 b/src/homogenization_none.f90
index 75d8bcd3a..b2d2f52a7 100644
--- a/src/homogenization_none.f90
+++ b/src/homogenization_none.f90
@@ -18,7 +18,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine homogenization_none_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/hydrogenflux_cahnhilliard.f90 b/src/hydrogenflux_cahnhilliard.f90
index 89479a9c9..569be97dc 100644
--- a/src/hydrogenflux_cahnhilliard.f90
+++ b/src/hydrogenflux_cahnhilliard.f90
@@ -51,7 +51,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine hydrogenflux_cahnhilliard_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/hydrogenflux_isoconc.f90 b/src/hydrogenflux_isoconc.f90
index bef2a8437..d1b13aa76 100644
--- a/src/hydrogenflux_isoconc.f90
+++ b/src/hydrogenflux_isoconc.f90
@@ -16,7 +16,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine hydrogenflux_isoconc_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/kinematics_cleavage_opening.f90 b/src/kinematics_cleavage_opening.f90
index fffa26165..74af0a52d 100644
--- a/src/kinematics_cleavage_opening.f90
+++ b/src/kinematics_cleavage_opening.f90
@@ -51,7 +51,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine kinematics_cleavage_opening_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/kinematics_hydrogen_strain.f90 b/src/kinematics_hydrogen_strain.f90
index c3af7e2a2..f3ea4df38 100644
--- a/src/kinematics_hydrogen_strain.f90
+++ b/src/kinematics_hydrogen_strain.f90
@@ -41,7 +41,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine kinematics_hydrogen_strain_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/kinematics_slipplane_opening.f90 b/src/kinematics_slipplane_opening.f90
index 07b98aa23..ba38ac05b 100644
--- a/src/kinematics_slipplane_opening.f90
+++ b/src/kinematics_slipplane_opening.f90
@@ -51,7 +51,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine kinematics_slipplane_opening_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/kinematics_thermal_expansion.f90 b/src/kinematics_thermal_expansion.f90
index e7cbca673..bb9083efb 100644
--- a/src/kinematics_thermal_expansion.f90
+++ b/src/kinematics_thermal_expansion.f90
@@ -41,7 +41,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine kinematics_thermal_expansion_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/kinematics_vacancy_strain.f90 b/src/kinematics_vacancy_strain.f90
index 9558f506d..227a86e0c 100644
--- a/src/kinematics_vacancy_strain.f90
+++ b/src/kinematics_vacancy_strain.f90
@@ -41,7 +41,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine kinematics_vacancy_strain_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/lattice.f90 b/src/lattice.f90
index 9635643e8..f46d0ef93 100644
--- a/src/lattice.f90
+++ b/src/lattice.f90
@@ -1243,7 +1243,7 @@ contains
 !> @brief Module initialization
 !--------------------------------------------------------------------------------------------------
 subroutine lattice_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/material.f90 b/src/material.f90
index aad71d49c..090b94023 100644
--- a/src/material.f90
+++ b/src/material.f90
@@ -361,7 +361,7 @@ contains
 !> material.config
 !--------------------------------------------------------------------------------------------------
 subroutine material_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/math.f90 b/src/math.f90
index 29d401162..43c24e7c2 100644
--- a/src/math.f90
+++ b/src/math.f90
@@ -172,7 +172,7 @@ contains
 !--------------------------------------------------------------------------------------------------
 subroutine math_init
 
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/mesh.f90 b/src/mesh.f90
index 827875d2f..9f8ce33ea 100644
--- a/src/mesh.f90
+++ b/src/mesh.f90
@@ -477,7 +477,7 @@ contains
 !! Order and routines strongly depend on type of solver
 !--------------------------------------------------------------------------------------------------
 subroutine mesh_init(ip,el)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/numerics.f90 b/src/numerics.f90
index 70c7f3c30..00d97297e 100644
--- a/src/numerics.f90
+++ b/src/numerics.f90
@@ -198,7 +198,7 @@ contains
 ! a sanity check
 !--------------------------------------------------------------------------------------------------
 subroutine numerics_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/plastic_disloUCLA.f90 b/src/plastic_disloUCLA.f90
index c02a7c4d4..9c0a6c494 100644
--- a/src/plastic_disloUCLA.f90
+++ b/src/plastic_disloUCLA.f90
@@ -119,7 +119,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine plastic_disloUCLA_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/plastic_dislotwin.f90 b/src/plastic_dislotwin.f90
index d6c73e8f3..c7aaf5400 100644
--- a/src/plastic_dislotwin.f90
+++ b/src/plastic_dislotwin.f90
@@ -198,7 +198,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine plastic_dislotwin_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/plastic_isotropic.f90 b/src/plastic_isotropic.f90
index 14c282f9a..2ba1238b2 100644
--- a/src/plastic_isotropic.f90
+++ b/src/plastic_isotropic.f90
@@ -90,7 +90,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine plastic_isotropic_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/plastic_none.f90 b/src/plastic_none.f90
index 839a4fa9f..140754556 100644
--- a/src/plastic_none.f90
+++ b/src/plastic_none.f90
@@ -26,7 +26,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine plastic_none_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/plastic_phenopowerlaw.f90 b/src/plastic_phenopowerlaw.f90
index 55d31fa9b..229d03c26 100644
--- a/src/plastic_phenopowerlaw.f90
+++ b/src/plastic_phenopowerlaw.f90
@@ -123,7 +123,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine plastic_phenopowerlaw_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/porosity_none.f90 b/src/porosity_none.f90
index 2bca99384..c273baf3b 100644
--- a/src/porosity_none.f90
+++ b/src/porosity_none.f90
@@ -16,7 +16,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine porosity_none_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/porosity_phasefield.f90 b/src/porosity_phasefield.f90
index 3f1c853a4..6ab7263e4 100644
--- a/src/porosity_phasefield.f90
+++ b/src/porosity_phasefield.f90
@@ -48,7 +48,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine porosity_phasefield_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/prec.f90 b/src/prec.f90
index 912a02533..f35735780 100644
--- a/src/prec.f90
+++ b/src/prec.f90
@@ -111,7 +111,7 @@ contains
 !> @brief reporting precision
 !--------------------------------------------------------------------------------------------------
 subroutine prec_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_damage_anisoBrittle.f90 b/src/source_damage_anisoBrittle.f90
index cad6bf1e4..22236a636 100644
--- a/src/source_damage_anisoBrittle.f90
+++ b/src/source_damage_anisoBrittle.f90
@@ -63,7 +63,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_damage_anisoBrittle_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_damage_anisoDuctile.f90 b/src/source_damage_anisoDuctile.f90
index 959e62e26..944a65918 100644
--- a/src/source_damage_anisoDuctile.f90
+++ b/src/source_damage_anisoDuctile.f90
@@ -67,7 +67,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_damage_anisoDuctile_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_damage_isoBrittle.f90 b/src/source_damage_isoBrittle.f90
index bd1026765..b9fb2c22c 100644
--- a/src/source_damage_isoBrittle.f90
+++ b/src/source_damage_isoBrittle.f90
@@ -53,7 +53,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_damage_isoBrittle_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_damage_isoDuctile.f90 b/src/source_damage_isoDuctile.f90
index 5d7e4f862..ed08e0a41 100644
--- a/src/source_damage_isoDuctile.f90
+++ b/src/source_damage_isoDuctile.f90
@@ -53,7 +53,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_damage_isoDuctile_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_thermal_dissipation.f90 b/src/source_thermal_dissipation.f90
index 99c41f062..7a4e85c75 100644
--- a/src/source_thermal_dissipation.f90
+++ b/src/source_thermal_dissipation.f90
@@ -39,7 +39,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_thermal_dissipation_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_thermal_externalheat.f90 b/src/source_thermal_externalheat.f90
index 6b015689a..2907ddf85 100644
--- a/src/source_thermal_externalheat.f90
+++ b/src/source_thermal_externalheat.f90
@@ -45,7 +45,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_thermal_externalheat_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_vacancy_irradiation.f90 b/src/source_vacancy_irradiation.f90
index 8f24b39be..566d97e68 100644
--- a/src/source_vacancy_irradiation.f90
+++ b/src/source_vacancy_irradiation.f90
@@ -41,7 +41,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_vacancy_irradiation_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_vacancy_phenoplasticity.f90 b/src/source_vacancy_phenoplasticity.f90
index 26c3ae828..8834a067a 100644
--- a/src/source_vacancy_phenoplasticity.f90
+++ b/src/source_vacancy_phenoplasticity.f90
@@ -39,7 +39,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_vacancy_phenoplasticity_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/source_vacancy_thermalfluc.f90 b/src/source_vacancy_thermalfluc.f90
index e5d3b0574..91047fbf2 100644
--- a/src/source_vacancy_thermalfluc.f90
+++ b/src/source_vacancy_thermalfluc.f90
@@ -41,7 +41,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine source_vacancy_thermalfluc_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_damage.f90 b/src/spectral_damage.f90
index 727659870..1ac3c4c73 100644
--- a/src/spectral_damage.f90
+++ b/src/spectral_damage.f90
@@ -60,7 +60,7 @@ contains
 !> @brief allocates all neccessary fields and fills them with data, potentially from restart info
 !--------------------------------------------------------------------------------------------------
 subroutine spectral_damage_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_mech_AL.f90 b/src/spectral_mech_AL.f90
index 6d0fff286..f2b9d3f7f 100644
--- a/src/spectral_mech_AL.f90
+++ b/src/spectral_mech_AL.f90
@@ -84,7 +84,7 @@ contains
 !> @todo use sourced allocation, e.g. allocate(Fdot,source = F_lastInc)
 !--------------------------------------------------------------------------------------------------
 subroutine AL_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_mech_Basic.f90 b/src/spectral_mech_Basic.f90
index 55403ee7c..00502b6b5 100644
--- a/src/spectral_mech_Basic.f90
+++ b/src/spectral_mech_Basic.f90
@@ -72,7 +72,7 @@ contains
 !> @brief allocates all neccessary fields and fills them with data, potentially from restart info
 !--------------------------------------------------------------------------------------------------
 subroutine basicPETSc_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_mech_Polarisation.f90 b/src/spectral_mech_Polarisation.f90
index ecf707d46..2d261ff1b 100644
--- a/src/spectral_mech_Polarisation.f90
+++ b/src/spectral_mech_Polarisation.f90
@@ -84,7 +84,7 @@ contains
 !> @todo use sourced allocation, e.g. allocate(Fdot,source = F_lastInc)
 !--------------------------------------------------------------------------------------------------
 subroutine Polarisation_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_thermal.f90 b/src/spectral_thermal.f90
index 322f12031..f89184543 100644
--- a/src/spectral_thermal.f90
+++ b/src/spectral_thermal.f90
@@ -60,7 +60,7 @@ contains
 !> @brief allocates all neccessary fields and fills them with data, potentially from restart info
 !--------------------------------------------------------------------------------------------------
 subroutine spectral_thermal_init
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/spectral_utilities.f90 b/src/spectral_utilities.f90
index 1bbf2e608..f0cf5db12 100644
--- a/src/spectral_utilities.f90
+++ b/src/spectral_utilities.f90
@@ -160,7 +160,7 @@ contains
 !> Initializes FFTW.
 !--------------------------------------------------------------------------------------------------
 subroutine utilities_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/thermal_adiabatic.f90 b/src/thermal_adiabatic.f90
index 7f23a81b5..62ffabf9c 100644
--- a/src/thermal_adiabatic.f90
+++ b/src/thermal_adiabatic.f90
@@ -46,7 +46,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine thermal_adiabatic_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/thermal_conduction.f90 b/src/thermal_conduction.f90
index c55d1d3eb..151eb7aa3 100644
--- a/src/thermal_conduction.f90
+++ b/src/thermal_conduction.f90
@@ -47,7 +47,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine thermal_conduction_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/thermal_isothermal.f90 b/src/thermal_isothermal.f90
index 87e846f12..68e09de8c 100644
--- a/src/thermal_isothermal.f90
+++ b/src/thermal_isothermal.f90
@@ -16,7 +16,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine thermal_isothermal_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/vacancyflux_cahnhilliard.f90 b/src/vacancyflux_cahnhilliard.f90
index 9f6ecd8b0..e40772d11 100644
--- a/src/vacancyflux_cahnhilliard.f90
+++ b/src/vacancyflux_cahnhilliard.f90
@@ -61,7 +61,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine vacancyflux_cahnhilliard_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/vacancyflux_isochempot.f90 b/src/vacancyflux_isochempot.f90
index 8c256467f..f98379eba 100644
--- a/src/vacancyflux_isochempot.f90
+++ b/src/vacancyflux_isochempot.f90
@@ -44,7 +44,7 @@ contains
 !> @details reads in material parameters, allocates arrays, and does sanity checks
 !--------------------------------------------------------------------------------------------------
 subroutine vacancyflux_isochempot_init(fileUnit)
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options
diff --git a/src/vacancyflux_isoconc.f90 b/src/vacancyflux_isoconc.f90
index ad7842e3f..470560206 100644
--- a/src/vacancyflux_isoconc.f90
+++ b/src/vacancyflux_isoconc.f90
@@ -16,7 +16,7 @@ contains
 !> @brief allocates all neccessary fields, reads information from material configuration file
 !--------------------------------------------------------------------------------------------------
 subroutine vacancyflux_isoconc_init()
-#ifdef __GFORTRAN__
+#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
  use, intrinsic :: iso_fortran_env, only: &
    compiler_version, &
    compiler_options