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AX_F90_MODULE_EXTENSION
Find Fortran 90 modules file extension. The module extension is stored in the cached variable ax_f90_modext, or "unknown" if the extension cannot be found.
Luc Maisonobe <luc@spaceroots.org>
2005-06-17
AC_DEFUN([AX_F90_MODULE_EXTENSION],[ AC_CACHE_CHECK([fortran 90 modules extension], ax_f90_modext, [AC_LANG_PUSH(Fortran) i=0 while test \( -f tmpdir_$i \) -o \( -d tmpdir_$i \) ; do i=`expr $i + 1` done mkdir tmpdir_$i cd tmpdir_$i AC_COMPILE_IFELSE([module conftest_module contains subroutine conftest_routine write(*,'(a)') 'gotcha!' end subroutine conftest_routine end module conftest_module ], [ax_f90_modext=`ls | sed -n 's,conftest_module\.,,p'` if test x$ax_f90_modext = x ; then dnl Some F90 compilers put module filename in uppercase letters ax_f90_modext=`ls | sed -n 's,CONFTEST_MODULE\.,,p'` if test x$ax_f90_modext = x ; then ax_f90_modext=unknown fi fi ], [ax_f90_modext=unknown]) cd .. rm -fr tmpdir_$i AC_LANG_POP(Fortran) ])])
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