diff --git a/conf/Makefile.sim b/conf/Makefile.sim
index ac4d378ee1..3b5315cf8d 100644
--- a/conf/Makefile.sim
+++ b/conf/Makefile.sim
@@ -45,20 +45,13 @@ Q=@
 # End of configuration part.
 #
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC = -fPIC
-else
-  FPIC =
-endif
-
 INCLUDES += -I $(shell $(OCAMLC) -where)
 
 CFLAGS  = -W -Wall
 CFLAGS += $(INCLUDES)
 CFLAGS += $($(TARGET).CFLAGS)
 CFLAGS += $(LOCAL_CFLAGS)
-CFLAGS += $(FPIC)
+CFLAGS += -fPIC
 CFLAGS += -O2
 CFLAGS += -g
 CFLAGS += -std=gnu99
diff --git a/sw/ground_segment/cockpit/Makefile b/sw/ground_segment/cockpit/Makefile
index 84703ccffa..b2d07e27c9 100644
--- a/sw/ground_segment/cockpit/Makefile
+++ b/sw/ground_segment/cockpit/Makefile
@@ -23,15 +23,7 @@
 # Quiet compilation
 Q=@
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-   FPIC=-fPIC
-   OCAMLCFLAGS=-thread -ccopt -fPIC
-else
-   FPIC=
-   OCAMLCFLAGS=-thread
-endif
-FPIC=-fPIC
+OCAMLCFLAGS=-thread -ccopt -fPIC
 
 include ../../Makefile.ocaml
 
@@ -100,7 +92,7 @@ clean:
 
 
 CC = gcc
-CFLAGS=-g -O2 -Wall `pkg-config gtk+-2.0 --cflags` $(FPIC)
+CFLAGS=-g -O2 -Wall `pkg-config gtk+-2.0 --cflags` -fPIC
 LDFLAGS=`pkg-config gtk+-2.0 --libs` -s -lglibivy
 
 
diff --git a/sw/ground_segment/joystick/Makefile b/sw/ground_segment/joystick/Makefile
index ce13743102..5924ee2d60 100644
--- a/sw/ground_segment/joystick/Makefile
+++ b/sw/ground_segment/joystick/Makefile
@@ -29,18 +29,11 @@ TOOLSDIR = ../../tools
 
 CC = gcc
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC=-fpic
-else
-  FPIC=
-endif
-
 OCAMLINCLUDES= -I $(TOOLSDIR)
 PKG = -package pprz,glibivy
 LINKPKG = $(PKG) -linkpkg -dllpath-pkg pprz
 
-GLIB_CFLAGS  = -Wall $(shell pkg-config glib-2.0 --cflags) $(FPIC)
+GLIB_CFLAGS  = -Wall $(shell pkg-config glib-2.0 --cflags) -fPIC
 GLIB_LDFLAGS = $(shell pkg-config glib-2.0 --libs) -lglibivy
 
 # apparently on OSX `sdl-config --libs` also has -lSDLmain which we don't want
diff --git a/sw/ground_segment/lpc21iap/Makefile b/sw/ground_segment/lpc21iap/Makefile
index d23ffc95b9..19ffb61af5 100644
--- a/sw/ground_segment/lpc21iap/Makefile
+++ b/sw/ground_segment/lpc21iap/Makefile
@@ -21,20 +21,13 @@ OD		= objdump
 RM		= rm
 TAR		= tar
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC=-fPIC
-else
-  FPIC=
-endif
-
 UNAME = $(shell uname -s)
 ifeq ("$(UNAME)","Darwin")
   LIBRARYS = $(shell if test -d /opt/paparazzi/lib; then echo "-L/opt/paparazzi/lib"; elif test -d /opt/local/lib; then echo "-L/opt/local/lib"; fi)
   INCLUDES = $(shell if test -d /opt/paparazzi/include; then echo "-I/opt/paparazzi/include"; elif test -d /opt/local/include; then echo "-I/opt/local/include"; fi)
 endif
 
-CFLAGS  = -Wall -g $(FPIC) $(INCLUDES) $(LIBRARYS)
+CFLAGS  = -Wall -g -fPIC $(INCLUDES) $(LIBRARYS)
 
 SOURCES =	lpc21iap.c elf.c lpcusb.c
 
diff --git a/sw/ground_segment/tmtc/Makefile b/sw/ground_segment/tmtc/Makefile
index 814ea6b996..95cd37f477 100644
--- a/sw/ground_segment/tmtc/Makefile
+++ b/sw/ground_segment/tmtc/Makefile
@@ -23,14 +23,6 @@
 # Quiet
 Q=@
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC = -fPIC
-else
-  FPIC =
-endif
-
-
 include ../../../conf/Makefile.local
 include ../../Makefile.ocaml
 CONF = ../../../conf
@@ -132,10 +124,10 @@ settings.cmo : ../cockpit/page_settings.cmi
 
 
 CC = gcc
-GLIB_CFLAGS  = -Wall  `pkg-config glib-2.0 --cflags` $(FPIC)
-GLIB_LDFLAGS =  `pkg-config glib-2.0 --libs` -lglibivy -lpcre $(FPIC)
-GTK_CFLAGS  = -Wall  `pkg-config gtk+-2.0 --cflags` $(FPIC)
-GTK_LDFLAGS =  `pkg-config gtk+-2.0 --libs` -lglibivy -lpcre $(FPIC)
+GLIB_CFLAGS  = -Wall  `pkg-config glib-2.0 --cflags` -fPIC
+GLIB_LDFLAGS =  `pkg-config glib-2.0 --libs` -lglibivy -lpcre -fPIC
+GTK_CFLAGS  = -Wall  `pkg-config gtk+-2.0 --cflags` -fPIC
+GTK_LDFLAGS =  `pkg-config gtk+-2.0 --libs` -lglibivy -lpcre -fPIC
 
 UNAME = $(shell uname -s)
 
diff --git a/sw/lib/ocaml/Makefile b/sw/lib/ocaml/Makefile
index 2a4b445a61..3159a90804 100644
--- a/sw/lib/ocaml/Makefile
+++ b/sw/lib/ocaml/Makefile
@@ -36,13 +36,6 @@ OCAMLLIBDIR=$(shell $(OCAMLC) -where)
 #VERBOSITY = -verbose
 VERBOSITY =
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC = -ccopt -fPIC
-else
-  FPIC =
-endif
-
 UNAME = $(shell uname -s)
 ifeq ("$(UNAME)","Darwin")
 	MKTEMP = gmktemp
@@ -112,7 +105,7 @@ tests : lib-pprz.cma $(TESTS_CMO)
 
 %.o : %.c
 	@echo OC $<
-	$(Q)$(OCAMLC) $(FPIC) $(INCLUDES) -package $(PKGCOMMON) -c $<
+	$(Q)$(OCAMLC) -ccopt -fPIC $(INCLUDES) -package $(PKGCOMMON) -c $<
 
 $(XCMO) $(XCMX) myGtkInit.cmo : PKGCOMMON=$(XPKGCOMMON)
 
diff --git a/sw/simulator/Makefile b/sw/simulator/Makefile
index b6010058e8..dc1f876449 100644
--- a/sw/simulator/Makefile
+++ b/sw/simulator/Makefile
@@ -22,12 +22,6 @@
 # Quiet compilation
 Q=@
 
-LBITS := $(shell getconf LONG_BIT)
-ifeq ($(LBITS),64)
-  FPIC = -fPIC
-else
-  FPIC =
-endif
 
 include ../../conf/Makefile.local
 include ../Makefile.ocaml
@@ -88,7 +82,7 @@ diffusion : stdlib.cmo diffusion.cmo
 
 %.o : %.c
 	@echo CC $<
-	$(Q)$(CC) $(FPIC) -c $< $(CAML_CFLAGS)
+	$(Q)$(CC) -fPIC -c $< $(CAML_CFLAGS)
 
 %.cmx : %.ml
 	@echo OOC $<