add make check target and basic tests

To conveniently run tests as

 $ make check
 ============================================================================
 Testsuite summary for gf-complete 1.0
 ============================================================================
 # TOTAL: 1
 # PASS:  1
 # SKIP:  0
 # XFAIL: 0
 # FAIL:  0
 # XPASS: 0
 # ERROR: 0
 ============================================================================

The run-tests.sh script loops over gf_methods and is introduced because
autotools does not allow tests to have parameters in the Makefile.am

Signed-off-by: Loic Dachary <loic@dachary.org>

README

@@ -24,3 +24,7 @@ To compile, do:
    ./configure
    make
    sudo make install
+
+To run the tests, do:
+
+   make check

tools/Makefile.am

@@ -3,6 +3,8 @@
 INCLUDES=-I./ -I../include
 AM_CFLAGS = -O3 $(SIMD_FLAGS) -fPIC $(INCLUDES)
 
+TESTS=run-tests.sh
+
 bin_PROGRAMS = gf_mult gf_div gf_add gf_time gf_methods gf_poly gf_inline_time
 
 gf_mult_SOURCES = gf_mult.c

tools/run-tests.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+for w in 4 8 16 32 64 128 ; do
+    ./gf_methods $w -A -U | sh -e
+    if [ $? != "0" ] ; then
+      echo "Failed unit tests for w=$w"
+      break
+    fi
+done