X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=redo;h=51f7affff8e68dbc404ff65f4e33a4dbbe470de9;hb=033d9244b2685c72d7934dbaaf8288b0f66c5230;hp=965988aa31b617acf0121efe82a6732e2a2320fb;hpb=5fd4be90f125e318a2fcaa0b92329511cb178f5a;p=plomrogue

diff --git a/redo b/redo
index 965988a..51f7aff 100755
--- a/redo
+++ b/redo
@@ -13,6 +13,36 @@
 # build/redo_scripts/. For details on this version, see:
 # - <http://news.dieweltistgarnichtso.net/bin/redo.html>
 # - <http://news.dieweltistgarnichtso.net/bin/redo-ifchange.html>
+#
+# This "redo" implementation may experience trouble on OS X systems, see
+# <https://github.com/plomlompom/plomrogue/issues/2#issuecomment-50972436> for a
+# workaround.
 
+# Some tests first: for gcc, and certain necessary header files. (This is not
+# strictly the responsibility of a mere redo wrapper. But those using a
+# pre-installed redo probably will be fine with the error messages thrown by it
+# if these miss.)
+test=`command -v gcc | wc -l`
+if [ 1 != $test ]
+then
+    echo "FAILURE:"
+    echo "No gcc installed, but it's needed!"
+    exit 1
+fi
+test_header() {
+    code="#include <$1>"
+    test=`echo $code | cpp -H -o /dev/null 2>&1 | head -n1 | grep error | wc -l`
+    if [ 0 != $test ]
+    then
+        echo "FAILURE:"
+        echo "No $1 header file found, but it's needed!"
+        echo "Maybe install some $2 package?"
+        exit 1
+    fi
+}
+test_header stdlib.h libc6-dev      # Assume stdlib.h guarantees full libc6-dev.
+test_header ncurses.h libncurses5-dev
+
+# The actual redo calling.
 export PATH=$PATH:$PWD/build/redo_scripts
 redo "$@"