# Copyright 1999-2013 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 # $Header: /var/cvsroot/gentoo-x86/eclass/fortran-2.eclass,v 1.20 2013/07/29 20:13:57 jlec Exp $ # @ECLASS: fortran-2.eclass # @MAINTAINER: # jlec@gentoo.org # sci@gentoo.org # @AUTHOR: # Author Justin Lecher <jlec@gentoo.org> # Test functions provided by Sebastien Fabbro and Kacper Kowalik # @BLURB: Simplify fortran compiler management # @DESCRIPTION: # If you need a fortran compiler, then you should be inheriting this eclass. # In case you only need optional support, please export FORTRAN_NEEDED before # inheriting the eclass. # # The eclass tests for working fortran compilers # and exports the variables FC and F77. # Optionally, it checks for extended capabilities based on # the variable options selected in the ebuild # The only phase function exported is fortran-2_pkg_setup. # @EXAMPLE: # FORTRAN_NEEDED="lapack fortran" # # inherit fortran-2 # # FORTRAN_NEED_OPENMP=1 # @ECLASS-VARIABLE: FORTRAN_NEED_OPENMP # @DESCRIPTION: # Set to "1" in order to automatically have the eclass abort if the fortran # compiler lacks openmp support. : ${FORTRAN_NEED_OPENMP:=0} # @ECLASS-VARIABLE: FORTRAN_STANDARD # @DESCRIPTION: # Set this, if a special dialect needs to be supported. # Generally not needed as default is sufficient. # # Valid settings are any combination of: 77 90 95 2003 : ${FORTRAN_STANDARD:=77} # @ECLASS-VARIABLE: FORTRAN_NEEDED # @DESCRIPTION: # If your package has an optional fortran support, set this variable # to the space separated list of USE triggering the fortran # dependency. # # e.g. FORTRAN_NEEDED=lapack would result in # # DEPEND="lapack? ( virtual/fortran )" # # If unset, we always depend on virtual/fortran. : ${FORTRAN_NEEDED:=always} inherit eutils toolchain-funcs for _f_use in ${FORTRAN_NEEDED}; do case ${_f_use} in always) DEPEND+=" virtual/fortran" break ;; no) break ;; *) DEPEND+=" ${_f_use}? ( virtual/fortran )" ;; esac done RDEPEND="${DEPEND}" # @FUNCTION: _fortran_write_testsuite # @INTERNAL # @DESCRIPTION: # writes fortran test code _fortran_write_testsuite() { local filebase=${T}/test-fortran # f77 code cat <<- EOF > "${filebase}.f" end EOF # f90/95 code cat <<- EOF > "${filebase}.f90" end EOF # f2003 code cat <<- EOF > "${filebase}.f03" procedure(), pointer :: p end EOF } # @FUNCTION: _fortran_compile_test # @USAGE: <compiler> [dialect] # @INTERNAL # @DESCRIPTION: # Takes fortran compiler as first argument and dialect as second. # Checks whether the passed fortran compiler speaks the fortran dialect _fortran_compile_test() { local filebase=${T}/test-fortran local fcomp=${1} local fdia=${2} local fcode=${filebase}.f${fdia} local ret [[ $# -lt 1 ]] && \ die "_fortran_compile_test() needs at least one argument" [[ -f ${fcode} ]] || _fortran_write_testsuite ${fcomp} "${fcode}" -o "${fcode}.x" \ >> "${T}"/_fortran_compile_test.log 2>&1 ret=$? rm -f "${fcode}.x" return ${ret} } # @FUNCTION: _fortran-has-openmp # @RETURN: return code of the compiler # @INTERNAL # @DESCRIPTION: # See if the fortran supports OpenMP. _fortran-has-openmp() { local flag local filebase=${T}/test-fc-openmp local fcode=${filebase}.f local ret local _fc=$(tc-getFC) cat <<- EOF > "${fcode}" call omp_get_num_threads end EOF for flag in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp; do ${_fc} ${flag} "${fcode}" -o "${fcode}.x" \ &>> "${T}"/_fortran_compile_test.log ret=$? (( ${ret} )) || break done rm -f "${fcode}.x" return ${ret} } # @FUNCTION: _fortran_die_msg # @INTERNAL # @DESCRIPTION: # Detailed description how to handle fortran support _fortran_die_msg() { echo eerror "Please install currently selected gcc version with USE=fortran." eerror "If you intend to use a different compiler then gfortran, please" eerror "set FC variable accordingly and take care that the necessary" eerror "fortran dialects are supported." echo die "Currently no working fortran compiler is available" } # @FUNCTION: _fortran_test_function # @INTERNAL # @DESCRIPTION: # Internal test function for working fortran compiler. # It is called in fortran-2_pkg_setup. _fortran_test_function() { local dialect : ${F77:=$(tc-getFC)} : ${FORTRAN_STANDARD:=77} for dialect in ${FORTRAN_STANDARD}; do case ${dialect} in 77) _fortran_compile_test $(tc-getF77) || \ _fortran_die_msg ;; 90|95) _fortran_compile_test $(tc-getFC) 90 || \ _fortran_die_msg ;; 2003) _fortran_compile_test $(tc-getFC) 03 || \ _fortran_die_msg ;; 2008) die "Future" ;; *) die "${dialect} is not a Fortran dialect." ;; esac done tc-export F77 FC einfo "Using following Fortran compiler:" einfo " F77: ${F77}" einfo " FC: ${FC}" if [[ ${FORTRAN_NEED_OPENMP} == 1 ]]; then if _fortran-has-openmp; then einfo "${FC} has OPENMP support" else die "Please install current gcc with USE=openmp or set the FC variable to a compiler that supports OpenMP" fi fi } # @FUNCTION: _fortran-2_pkg_setup # @INTERNAL # @DESCRIPTION: # _The_ fortran-2_pkg_setup() code _fortran-2_pkg_setup() { for _f_use in ${FORTRAN_NEEDED}; do case ${_f_use} in always) _fortran_test_function && break ;; no) einfo "Forcing fortran support off" break ;; *) if use ${_f_use}; then _fortran_test_function && break else unset FC unset F77 fi ;; esac done } # @FUNCTION: fortran-2_pkg_setup # @DESCRIPTION: # Setup functionality, # checks for a valid fortran compiler and optionally for its openmp support. fortran-2_pkg_setup() { case ${EAPI:-0} in 0|1|2|3) eqawarn "Support for EAPI < 4 will be removed from the" eqawarn "fortran-2.eclass in until 2013-09-30." eqawarn "Please migrate your package to a higher EAPI" eqawarn "or file a bug at https://bugs.gentoo.org" _fortran-2_pkg_setup ;; 4|5) if [[ ${MERGE_TYPE} != binary ]]; then _fortran-2_pkg_setup fi ;; esac } case ${EAPI:-0} in 0|1|2|3|4|5) EXPORT_FUNCTIONS pkg_setup ;; *) die "EAPI=${EAPI} is not supported" ;; esac