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# Copyright 1999-2012 Gentoo Foundation |
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# Distributed under the terms of the GNU General Public License v2 |
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# $Header: /var/cvsroot/gentoo-x86/eclass/fortran-2.eclass,v 1.5 2011/08/22 04:46:31 vapier Exp $ |
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# @ECLASS: fortran-2.eclass |
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# @MAINTAINER: |
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# jlec@gentoo.org |
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# sci@gentoo.org |
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# @AUTHOR: |
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# Author Justin Lecher <jlec@gentoo.org> |
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# Test functions provided by Sebastien Fabbro and Kacper Kowalik |
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# @BLURB: Simplify fortran compiler management |
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# @DESCRIPTION: |
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# If you need a fortran compiler, then you should be inheriting this eclass and |
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# adding virtual/fortran to your dependencies. |
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# The eclass tests for working fortran compilers |
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# and exports the variables FC and F77. |
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# Optionally, it checks for extended capabilities based on |
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# the variable options selected in the ebuild |
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# The only phase function exported is fortran-2_pkg_setup. |
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|
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# @ECLASS-VARIABLE: FORTRAN_NEED_OPENMP |
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# @DESCRIPTION: |
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# Set to "1" in order to automatically have the eclass abort if the fortran |
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# compiler lacks openmp support. |
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: ${FORTRAN_NEED_OPENMP:=0} |
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|
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# @ECLASS-VARIABLE: FORTRAN_STANDARD |
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# @DESCRIPTION: |
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# Set this, if a special dialect needs to be supported. |
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# Generally not needed as default is sufficient. |
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# |
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# Valid settings are any combination of: 77 90 95 2003 |
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: ${FORTRAN_STANDARD:=77} |
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|
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inherit toolchain-funcs |
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|
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# @FUNCTION: _write_testsuite |
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# @INTERNAL |
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# @DESCRIPTION: |
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# writes fortran test code |
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_write_testsuite() { |
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local filebase=${T}/test-fortran |
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|
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# f77 code |
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cat <<- EOF > "${filebase}.f" |
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end |
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EOF |
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|
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# f90/95 code |
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cat <<- EOF > "${filebase}.f90" |
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end |
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EOF |
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|
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# f2003 code |
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cat <<- EOF > "${filebase}.f03" |
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procedure(), pointer :: p |
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end |
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EOF |
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} |
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|
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# @FUNCTION: _compile_test |
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# @INTERNAL |
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# @DESCRIPTION: |
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# Takes fortran compiler as first argument and dialect as second. |
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# Checks whether the passed fortran compiler speaks the fortran dialect |
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_compile_test() { |
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local filebase=${T}/test-fortran |
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local fcomp=${1} |
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local fdia=${2} |
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local fcode=${filebase}.f${fdia} |
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local ret |
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|
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[[ $# -eq 0 ]] && die "_compile_test() needs at least one argument" |
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|
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[[ -f ${fcode} ]] || _write_testsuite |
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|
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${fcomp} "${fcode}" -o "${fcode}.x" >&/dev/null |
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ret=$? |
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|
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rm -f "${fcode}.x" |
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return ${ret} |
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} |
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|
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# @FUNCTION: _fortran-has-openmp |
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# @INTERNAL |
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# @DESCRIPTION: |
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# See if the fortran supports OpenMP. |
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_fortran-has-openmp() { |
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local flag |
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local filebase=${T}/test-fc-openmp |
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local fcode=${filebase}.f |
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local ret |
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local _fc=$(tc-getFC) |
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|
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cat <<- EOF > "${fcode}" |
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call omp_get_num_threads |
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end |
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EOF |
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|
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for flag in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do |
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${_fc} ${flag} "${fcode}" -o "${fcode}.x" >&/dev/null |
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ret=$? |
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(( ${ret} )) || break |
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done |
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|
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rm -f "${fcode}.x" |
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return ${ret} |
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} |
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|
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# @FUNCTION: _die_msg |
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# @INTERNAL |
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# @DESCRIPTION: |
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# Detailed description how to handle fortran support |
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_die_msg() { |
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echo |
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eerror "Please install currently selected gcc version with USE=fortran." |
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eerror "If you intend to use a different compiler then gfortran, please" |
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eerror "set FC variable accordingly and take care that the neccessary" |
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eerror "fortran dialects are support." |
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echo |
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die "Currently no working fortran compiler is available" |
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} |
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|
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# @FUNCTION: fortran-2_pkg_setup |
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# @DESCRIPTION: |
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# Setup functionallity, checks for a valid fortran compiler and optionally for its openmp support. |
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fortran-2_pkg_setup() { |
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local dialect |
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|
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: ${F77:=$(tc-getFC)} |
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|
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: ${FORTRAN_STANDARD:=77} |
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for dialect in ${FORTRAN_STANDARD}; do |
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case ${dialect} in |
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77) _compile_test $(tc-getF77) || _die_msg ;; |
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90|95) _compile_test $(tc-getFC) 90 || _die_msg ;; |
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2003) _compile_test $(tc-getFC) 03 || _die_msg ;; |
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2008) die "Future" ;; |
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*) die "${dialect} is not a Fortran dialect." ;; |
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esac |
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done |
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|
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if [[ ${FORTRAN_NEED_OPENMP} == 1 ]]; then |
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_fortran-has-openmp || \ |
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die "Please install current gcc with USE=openmp or set the FC variable to a compiler that supports OpenMP" |
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fi |
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tc-export F77 FC |
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} |
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|
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case ${EAPI:-0} in |
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0|1|2|3|4|5) EXPORT_FUNCTIONS pkg_setup ;; |
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*) die "EAPI=${EAPI} is not supported" ;; |
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esac |
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