Use packaged distribution for running tests

.travis.yml

@@ -11,4 +11,4 @@ env:
   - CFLAGS=-O2 CXXFLAGS=-O2
   - CFLAGS="-O2 -pedantic -Wall -Wextra -Werror" CXXFLAGS="-O2 -pedantic -Wall -Wextra -Werror"
   - CFLAGS=-O3 CXXFLAGS=-O3
-script: autoreconf -f -i && ./configure && make check
+script: support/test-build.sh

configure.ac

@@ -1,5 +1,7 @@
 AC_INIT([recoverjpeg], [2.6])
 AC_CONFIG_SRCDIR([src/recoverjpeg.c])
+AC_CONFIG_AUX_DIR([support])
+AC_CONFIG_MACRO_DIR([support])
 AM_INIT_AUTOMAKE
 AC_CONFIG_HEADER([config.h])
 AC_PROG_CC

support/test-build.sh

@@ -0,0 +1,15 @@
+#! /bin/sh -e
+autoreconf -fvi
+rm -rf *.tar.gz
+./configure
+make dist
+rm -rf _build
+mkdir _build
+cd _build
+tar zxvf ../*.tar.gz
+cd recoverjpeg*
+mkdir _build
+cd _build
+../configure
+make
+make check