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#! /bin/sh
if [ "${F77}" = "none" ] && [ "${F90}" = "none" ]; then
echo 'BEGIN ERROR'
echo "Fortran thorn requires that a Fortran compiler is defined, but F77 = '$F77' and F90 = '$F90'. Aborting."
echo 'END ERROR'
exit 1
fi
# Try to use ## for token concatenation.
# If this works, we likely have an ANSI cpp.
rm config.tmp config.out 2> /dev/null
if test -z "${FPP}"; then
# FPP is not defined; try to guess which fpp will be chosen later
FPP=cpp
fi
cat > config.tmp <<EOF
#define CONCAT(a,b) a##b
CONCAT(hello,world)
EOF
${FPP} ${FPPFLAGS} config.tmp > config.out
grep 'helloworld' config.out > /dev/null 2> /dev/null
# grep returns 0 for success, non-zero for failure
cpp_ansi=$?
rm config.tmp config.out 2> /dev/null
cat > config.tmp <<EOF
#define CONCAT(a,b) a/**/b
CONCAT(hello,world)
EOF
${FPP} ${FPPFLAGS} config.tmp > config.out
grep 'helloworld' config.out > /dev/null 2> /dev/null
# grep returns 0 for success, non-zero for failure
cpp_traditional=$?
rm config.tmp config.out 2> /dev/null
if test ${cpp_ansi} = 0; then
echo 'BEGIN MESSAGE'
echo 'Found an ANSI-like Fortran cpp'
echo 'END MESSAGE'
echo 'BEGIN DEFINE'
echo 'FORTRAN_CPP_ANSI 1'
echo 'END DEFINE'
elif test ${cpp_traditional} = 0; then
echo 'BEGIN MESSAGE'
echo 'Found a traditional Fortran cpp'
echo 'END MESSAGE'
echo 'BEGIN DEFINE'
echo 'FORTRAN_CPP_ANSI 0'
echo 'END DEFINE'
else
echo 'BEGIN ERROR'
echo 'No Fortran preprocessor defined'
echo 'END ERROR'
fi
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