diff --git a/build.sh b/build.sh
index bc7302df..79dcf5d1 100755
--- a/build.sh
+++ b/build.sh
@@ -1,30 +1,34 @@
 #!/bin/bash
 
-cd lib
-echo ============= we are in $PWD
-make
-error=$?
-if [ 0 -ne $error ]; then
-	printf "in %s err %d in %s\n" $PWD $error $0
-	exit $error
-fi
-echo
-cd ..
+# ------------------------------------------------------------------
 
-cd funcs
-echo ============= we are in $PWD
-make
+function build
+{
+echo ============= $1 ==============
+curdir=${PWD}
+cd $1
+make 
 error=$?
-if [ 0 -ne $error ]; then
-	printf "in %s err %d in %s\n" $PWD $error $0
-	exit $error
+cd ${curdir}
+
+if [ ${error} -ne 0 ]
+then
+	echo === error on $1 = ${error}
+	exit
 fi
-echo
-cd ..
+}
+
+# ------------------------------------------------------------------
+
+build lib
+build funcs
+build tools
+
+# ------------------------------------------------------------------
 
 cd tools
 echo 
-make fimg2pnm addtga2fimg mkfimg png2fimg fimgstats fimg2png
+make 
 error=$?
 cd ..
 
diff --git a/tools/Makefile b/tools/Makefile
index 6e457775..63cb07c6 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -8,6 +8,8 @@ DEPS = ../floatimg.h  ../libfloatimg.a Makefile
 
 # 			----------
 
+all:	fimg2pnm addtga2fimg mkfimg png2fimg fimgstats fimg2png
+
 fimgstats:	fimgstats.c $(DEPS)
 	gcc -g $< ../libfloatimg.a -o $@ 
 
diff --git a/v4l2/Makefile b/v4l2/Makefile
new file mode 100644
index 00000000..8598717f
--- /dev/null
+++ b/v4l2/Makefile
@@ -0,0 +1,9 @@
+
+
+COPT = -Wall -fpic -g -DDEBUG_LEVEL=1
+DEPS = ../floatimg.h  ../libfloatimg.a Makefile
+
+
+
+t:	t.c Makefile ${DEPS}
+	gcc ${COPT} $< ../libfloatimg.a -o $@
\ No newline at end of file
diff --git a/v4l2/t b/v4l2/t
new file mode 100755
index 00000000..3271183e
Binary files /dev/null and b/v4l2/t differ
diff --git a/v4l2/t.c b/v4l2/t.c
new file mode 100644
index 00000000..5845c98f
--- /dev/null
+++ b/v4l2/t.c
@@ -0,0 +1,46 @@
+/*
+ *		tests pour capturer les webcams
+ */
+
+#include  <stdio.h>
+#include  <stdlib.h>
+#include  <unistd.h>
+#include  <math.h>
+#include  <string.h>
+
+#include  "floatimg.h"
+
+int		verbosity;
+
+/* --------------------------------------------------------------------- */
+void help(int k)
+{
+puts("Options :");
+puts("\t-d WxH\timage size");
+puts("\t-v\tincrease verbosity");
+exit(0);
+}
+/* --------------------------------------------------------------------- */
+
+int main(int argc, char *argv[])
+{
+int		foo, opt;
+int		W = 800, H = 600;
+double		tb;
+int		K = 0;
+
+while ((opt = getopt(argc, argv, "hK:v")) != -1) {
+	switch(opt) {
+		case 'h':	help(0);		break;
+		case 'K':	K = atol(optarg);	break;
+		case 'v':	verbosity++;		break;
+		}
+	}
+
+if (verbosity) fimg_print_version(0);
+
+return 0;
+}
+/* --------------------------------------------------------------------- */
+
+