From fd2fefc00aa08026238d3f9db27051cadfdd362c Mon Sep 17 00:00:00 2001
From: Justin Lecher <jlec@gentoo.org>
Date: Sun, 12 Jun 2011 12:52:53 +0200
Subject: fortran-2.eclass added

---
 eclass/fortran-2.eclass | 63 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 eclass/fortran-2.eclass

(limited to 'eclass/fortran-2.eclass')

diff --git a/eclass/fortran-2.eclass b/eclass/fortran-2.eclass
new file mode 100644
index 000000000..6528724c4
--- /dev/null
+++ b/eclass/fortran-2.eclass
@@ -0,0 +1,63 @@
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# Author Justin Lecher <jlec@gentoo.org>
+
+# @ECLASS: fortran-2.eclass
+# @MAINTAINER:
+# sci@gentoo.org
+# jlec@gentoo.org
+# @BLURB: Packages, which need a frortran compiler should inherit this eclass.
+# @DESCRIPTION:
+# If you need a fortran compiler, inherit this eclass. This eclass tests for
+# working fortran compilers. Optional, check for openmp capability of the
+# current fortran compiler through FCOPENMP=1. Only function exported
+# is pkg_setup.
+
+# @ECLASS-VARIABLE: FCOPENMP
+# @DESCRIPTION:
+# If FCOPNMP=1, FC is tested for openmp capabilities
+#
+# Default is 0
+
+inherit toolchain-funcs
+
+DEPEND="virtual/fortran"
+RDEPEND="${DEPEND}"
+
+_tc-has-fortran() {
+	local base="${T}/test-tc-fortran"
+	cat <<-EOF > "${base}.f"
+	      end
+	EOF
+	$(tc-getFC "$@") "${base}.f" -o "${base}" >&/dev/null
+	local ret=$?
+	rm -f "${base}"*
+	return ${ret}
+}
+
+# See if the toolchain gfortran only supports OpenMP.
+_gfortran-has-openmp() {
+	[[ $(tc-getFC) != *gfortran* ]] && return 0
+	local base="${T}/test-fc-openmp"
+	# leave extra leading space to make sure it works on fortran 77 as well
+	cat <<- EOF > "${base}.f"
+	call omp_get_num_threads
+	end
+	EOF
+	$(tc-getFC "$@") -fopenmp "${base}.f" -o "${base}" >&/dev/null
+	local ret=$?
+	rm -f "${base}"*
+	return ${ret}
+}
+
+fortran-2_pkg_setup() {
+	_tc-has-fortran || \
+		 die "Please emerge the current gcc with USE=fortran or export FC defining a working fortran compiler"
+	if [[ ${FCOPENMP} == 1 ]]; then
+		_gfortran-has-openmp || die "Please emerge current gcc with USE=openmp"
+	fi
+}
+
+EXPORT_FUNCTIONS pkg_setup
-- 
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