Initial class construction

Git/etc/msystem

@@ -0,0 +1,53 @@
+# MSYSTEM Environment Information
+# Copyright (C) 2016 Renato Silva
+# Licensed under public domain
+
+# Once sourced, this script provides common information associated with the
+# current MSYSTEM. For example, the compiler architecture and host type.
+
+# The MSYSTEM_ prefix is used for avoiding too generic names. For example,
+# makepkg is sensitive to the value of CARCH, so MSYSTEM_CARCH is defined
+# instead. The MINGW_ prefix does not influence makepkg-mingw variables and
+# is not used for the MSYS shell.
+
+export MSYSTEM="${MSYSTEM:-MSYS}"
+
+unset MSYSTEM_PREFIX
+unset MSYSTEM_CARCH
+unset MSYSTEM_CHOST
+
+unset MINGW_CHOST
+unset MINGW_PREFIX
+unset MINGW_PACKAGE_PREFIX
+
+unset CONFIG_SITE
+
+case "${MSYSTEM}" in
+    MINGW32)
+        MSYSTEM_PREFIX='/mingw32'
+        MSYSTEM_CARCH='i686'
+        MSYSTEM_CHOST='i686-w64-mingw32'
+        MINGW_CHOST="${MSYSTEM_CHOST}"
+        MINGW_PREFIX="${MSYSTEM_PREFIX}"
+        MINGW_PACKAGE_PREFIX="mingw-w64-${MSYSTEM_CARCH}"
+        CONFIG_SITE="${MSYSTEM_PREFIX}/etc/config.site"
+        export MSYSTEM_PREFIX MSYSTEM_CARCH MSYSTEM_CHOST MINGW_CHOST MINGW_PREFIX MINGW_PACKAGE_PREFIX CONFIG_SITE
+        ;;
+    MINGW64)
+        MSYSTEM_PREFIX='/mingw64'
+        MSYSTEM_CARCH='x86_64'
+        MSYSTEM_CHOST='x86_64-w64-mingw32'
+        MINGW_CHOST="${MSYSTEM_CHOST}"
+        MINGW_PREFIX="${MSYSTEM_PREFIX}"
+        MINGW_PACKAGE_PREFIX="mingw-w64-${MSYSTEM_CARCH}"
+        CONFIG_SITE="${MSYSTEM_PREFIX}/etc/config.site"
+        export MSYSTEM_PREFIX MSYSTEM_CARCH MSYSTEM_CHOST MINGW_CHOST MINGW_PREFIX MINGW_PACKAGE_PREFIX CONFIG_SITE
+        ;;
+    *)
+        MSYSTEM_PREFIX='/usr'
+        MSYSTEM_CARCH="${HOSTTYPE}"
+        MSYSTEM_CHOST="${MACHTYPE}"
+        CONFIG_SITE="/etc/config.site"
+        export MSYSTEM_PREFIX MSYSTEM_CARCH MSYSTEM_CHOST CONFIG_SITE
+        ;;
+esac