strip out '-fp-model source' as a whole, rather than only stripping out '-fp-model' which leads to compilation errors:
"File not found: 'source'"

author: Ward Poelmans (VUB)
--- mesa-17.0.2/configure.orig	2017-03-31 15:08:32.677119063 +0200
+++ mesa-17.0.2/configure	2017-03-31 15:09:03.797577051 +0200
@@ -22317,6 +22317,7 @@
         -e 's/\s\+-O\S*//g' \
         -e 's/\s\+-g\S*//g' \
         -e 's/-fno-rtti\>/-Fno-rtti/g' \
+        -e 's/\s\+-fp-model \S*//g' \
         -e 's/\s\+-f\S*//g' \
         -e 's/-Fno-rtti\>/-fno-rtti/g' \
         -e 's/^ //'
