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46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
8 years ago
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dnl @synopsis AX_F90_MODULE_EXTENSION
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dnl
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dnl Find Fortran 90 modules file extension. The module extension is
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dnl stored in the cached variable ax_f90_modext, or "unknown" if the
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dnl extension cannot be found.
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dnl
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dnl @category Fortran
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dnl @author Luc Maisonobe <luc@spaceroots.org>
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dnl @version 2005-06-17
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dnl @license AllPermissive
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dnl modified Salvatore Filippone <salvatore.filippone@uniroma2.it>
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dnl make it work even if ac_fc_ext="f"
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AC_DEFUN([AX_F90_MODULE_EXTENSION],[
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AC_CACHE_CHECK([fortran 90 modules extension],
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ax_cv_f90_modext,
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[AC_LANG_PUSH(Fortran)
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i=0
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while test \( -f tmpdir_$i \) -o \( -d tmpdir_$i \) ; do
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i=`expr $i + 1`
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done
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mkdir tmpdir_$i
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cd tmpdir_$i
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AC_COMPILE_IFELSE([
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module conftest_module
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contains
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subroutine conftest_routine
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write(*,'(a)') 'gotcha!'
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end subroutine conftest_routine
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end module conftest_module
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],
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[ax_cv_f90_modext=`ls | sed -n 's,conftest_module\.,,p'`
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if test x$ax_cv_f90_modext = x ; then
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dnl Some F90 compilers put module filename in uppercase letters
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ax_cv_f90_modext=`ls | sed -n 's,CONFTEST_MODULE\.,,p'`
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if test x$ax_cv_f90_modext = x ; then
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ax_cv_f90_modext=unknown
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fi
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fi
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],
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[ax_cv_f90_modext=unknown])
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cd ..
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rm -fr tmpdir_$i
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AC_LANG_POP(Fortran)
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])])
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