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# Copyright (C) 2001-2016 Quantum ESPRESSO Foundation
AC_DEFUN([X_AC_QE_CPP], [
# preprocessor - try cpp in all cases; the preprocessor returned by
# AC_PROG_CPP
# may sometimes refuse to preprocess fortran files
if test "$cpp" = "" ; then cpp=$try_cpp; fi
# if test "$cpp" = "" ; then cpp=$CPP; fi
echo setting CPP... $cpp
echo $ECHO_N "setting CPPFLAGS... $ECHO_C"
# Note: option -C makes trouble with recent gcc versions and pgi
case $cpp in
cpp) try_cppflags="-P -traditional -Uvector" ;;
fpp) try_cppflags="-P " ;;
*) try_cppflags="" ;;
esac
if test "$cppflags" = "" ; then cppflags=$try_cppflags ; fi
echo "${ECHO_T}$cppflags"
# compilation flags for all subsequent tests
test_cppflags="$test_cflags"
AC_SUBST(cpp)
AC_SUBST(cppflags)
]
)
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