print info of travis ci build environment

.travis.yml

@@ -8,3 +8,5 @@ before_install:
   - apt-cache search libicu | grep icu
   - sudo apt-get -qq update
   - sudo apt-get -q install autoconf automake autopoint libtool gtk-doc-tools gettext idn2 libidn2-0 libidn2-0-dev libicu48 libicu-dev
+  - ls -la /usr/lib/*/pkgconfig/icu-uc.pc
+  - updatedb && locate icu-cu

configure.ac

@@ -8,6 +8,7 @@ AM_INIT_AUTOMAKE([1.10 -Wall no-define])
 # the library.
 AC_CONFIG_HEADERS([config.h])
 AC_PROG_CXX
+AM_PROG_CC_C_O
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 #LT_INIT([disable-static])
 LT_INIT