--- a/Make.inc
+++ b/Make.inc
@@ -14,41 +14,18 @@ bindir = $(prefix)/bin
 libdir = $(prefix)/lib
 includedir = $(prefix)/include
 
-FC = gfortran
 # CFLAGS_add and FFLAGS_add are flags that we always want to include
 # They are not overridable by the user, whereas CFLAGS and FFLAGS are
 # simply defaults and are overridable via environment variables or
 # `make CFLAGS="foo"` on the command line
 
-FFLAGS = -O3 -fno-optimize-sibling-calls
-CFLAGS = -std=c99 -O3
-CPPFLAGS =
+CFLAGS += -std=c99 -Wall
 
 override FFLAGS_add =
 override CFLAGS_add =
 override CPPFLAGS_add =
 override LDFLAGS_add =
 
-USEGCC = 1
-USECLANG = 0
-
-ifneq (,$(findstring $(OS),FreeBSD Darwin))
-USEGCC = 0
-USECLANG = 1
-endif
-
-AR = ar
-
-ifeq ($(USECLANG),1)
-USEGCC = 0
-CC = clang
-override CFLAGS_add += -fno-builtin
-endif
-
-ifeq ($(USEGCC),1)
-CC = gcc
-override CFLAGS_add += -fno-gnu89-inline -std=c99
-endif
 
 ARCH := $(shell $(CC) -dumpmachine | sed "s/\([^-]*\).*$$/\1/")
 ifeq ($(ARCH),mingw32)
diff --git a/Makefile b/Makefile
index 7b028b8..c30ed98 100644
--- a/Makefile
+++ b/Makefile
@@ -35,9 +35,7 @@ OSF_MAJOR_SHLIB_EXT := $(SHLIB_EXT).$(SOMAJOR)
 endif
 endif
 
-all: libopenspecfun.a libopenspecfun.$(OSF_MAJOR_MINOR_SHLIB_EXT)
-libopenspecfun.a: $(OBJS)
-	$(AR) -rcs libopenspecfun.a $(OBJS)
+all: libopenspecfun.$(OSF_MAJOR_MINOR_SHLIB_EXT)
 libopenspecfun.$(OSF_MAJOR_MINOR_SHLIB_EXT): $(OBJS)
 	$(FC) -shared $(OBJS) $(LDFLAGS) $(LDFLAGS_add) -Wl,$(SONAME_FLAG),libopenspecfun.$(OSF_MAJOR_SHLIB_EXT) -o $@
 ifneq ($(OS),WINNT)
@@ -50,7 +48,6 @@ install: all
 	mkdir -p $(DESTDIR)$(libdir)
 	mkdir -p $(DESTDIR)$(includedir)
 	cp -a libopenspecfun.*$(SHLIB_EXT)* $(DESTDIR)$(shlibdir)/
-	cp -a libopenspecfun.a $(DESTDIR)$(libdir)/
 	cp -a Faddeeva/Faddeeva.h $(DESTDIR)$(includedir)
 
 clean: