Split prepare_buildenv() to libmakepkg

This opens the door for third parties to provide libmakepkg
extentions for the purpose of altering the build environment.

Signed-off-by: Que Quotion <quequotion@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/scripts/libmakepkg/buildenv/buildflags.sh.in b/scripts/libmakepkg/buildenv/buildflags.sh.in
new file mode 100644
index 00000000..daccc9cc
--- /dev/null
+++ b/scripts/libmakepkg/buildenv/buildflags.sh.in
@@ -0,0 +1,35 @@
+#!/usr/bin/bash
+#
+#   buildflags.sh - Clear user-specified buildflags if requested
+#
+#   Copyright (c) 2011-2018 Pacman Development Team <pacman-dev@archlinux.org>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+[[ -n "$LIBMAKEPKG_BUILDENV_BUILDFLAGS_SH" ]] && return
+LIBMAKEPKG_BUILDENV_BUILDFLAGS_SH=1
+
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
+source "$LIBRARY/util/option.sh"
+
+build_options+=('buildflags')
+buildenv_functions+=('buildenv_buildflags')
+
+buildenv_buildflags() {
+	if check_option "buildflags" "n"; then
+		unset CPPFLAGS CFLAGS DEBUG_CFLAGS CXXFLAGS DEBUG_CXXFLAGS LDFLAGS
+	fi
+}