Build flags cleanup, get flags from environment.

diff --git a/build/linux/Makefile.linux b/build/linux/Makefile.linux
index 9760a98..ebde843 100644
--- a/build/linux/Makefile.linux
+++ b/build/linux/Makefile.linux
@@ -1,9 +1,11 @@
 
-CFLAGS := -DNDEBUG -O3 -fno-exceptions -fPIC -ffast-math -msse -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -DUSE_PTHREADS
+ATLAS_LIBS ?= -llapack -lcblas
+
+CFLAGS := -DNDEBUG -O3 -fno-exceptions -fPIC -ffast-math -ftree-vectorize -fomit-frame-pointer -DUSE_PTHREADS $(ATLAS_CFLAGS) $(CFLAGS)
 
 CXXFLAGS := $(CFLAGS)
 
-LDFLAGS	 := -Wl,-Bstatic -lqm-dsp -lvamp-sdk -L/usr/lib/sse2/atlas -L/usr/lib/atlas/sse -llapack -lblas -Wl,-Bdynamic -lpthread -Wl,--version-script=vamp-plugin.map
+LDFLAGS	 := -shared -lqm-dsp -lvamp-sdk -lpthread -Wl,--version-script=vamp-plugin.map $(ATLAS_LIBS) $(LDFLAGS)
 
 PLUGIN_EXT   := .so