Allow GCC 10+ compilation (#21)

* add -fallow-argument-mismatch for GCC 10+

* use compiler flag from config

* typo fix

common_real.mk

@@ -39,9 +39,13 @@ MAKE_CLEAN_ARGUMENTS = *~ *.o *.mod *.il *.stb c_* *.a
 #      *                                                                *
 #      ******************************************************************
 
+# Check compiler and version and add flags if needed
+EXTRA_FF77_FLAGS = $(shell bash ../../config/compilerCheck.sh $(FF90))
+
 FF77_ALL_FLAGS = -I$(MODDIR) \
 		$(CGNS_INCLUDE_FLAGS) \
-		$(FF77_FLAGS)
+		$(FF77_FLAGS) \
+		$(EXTRA_FF77_FLAGS)
 
 FF90_ALL_FLAGS = -I$(MODDIR) \
 		$(CGNS_INCLUDE_FLAGS) \

config/compilerCheck.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Need one argument at least
+if [ -z $1 ]; then
+    echo "$0 needs to be called with the compiler name as an argument"; exit 1
+fi
+
+# Initialize variables
+FF90=$1
+FFLAGS=""
+
+# Allow argument mismatch for gfortran >= 10
+
+# NOTE: The reason for adding this flag is because Tapenade 3.16's ADFirstAidKit is not compliant with GCC 10+.
+# This should be removed once Tapenade fixes this or removes the ADFirstAidKit.
+
+fc=$("$FF90" --version 2>&1 | grep -i 'gnu')
+if [ ! -z "$fc" ]; then
+    # Get the GNU compiler version
+    version=$("$FF90" -v 2>&1 | grep 'gcc version' | cut -d' ' -f3)
+    if [ ! -z "$version" ]; then
+      # Get the major version
+      version_major=`echo $version | cut -f1 -d.`
+    fi
+
+    if [ $version_major -ge 10 ]; then
+        FFLAGS="-fallow-argument-mismatch"
+    fi
+fi
+
+# Print at end to add to the makefile
+echo "$FFLAGS"