From 5e83a23897b5160fa96788c5828d23ab1912d1a6 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Wed, 28 Sep 2011 16:05:50 +0100
Subject: upgrade gtest m4 config

---
 configure.ac |  4 ++--
 m4/gtest.m4  | 65 ++++++++++++++++++++++++++++++++++++------------------------
 2 files changed, 41 insertions(+), 28 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8e06bffd..2e9cc36d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,7 @@ AC_CHECK_HEADER(google/dense_hash_map,
                [AC_DEFINE([HAVE_SPARSEHASH], [], [flag for google::dense_hash_map])])
 
 AC_PROG_INSTALL
-GTEST_LIB_CHECK
+GTEST_LIB_CHECK(1.0)
 
 AM_CONDITIONAL([RAND_LM], false)
 AC_ARG_WITH(randlm,
@@ -113,4 +113,4 @@ then
   AM_CONDITIONAL([GLC], true)
 fi
 
-AC_OUTPUT(Makefile utils/Makefile mteval/Makefile extools/Makefile decoder/Makefile phrasinator/Makefile training/Makefile vest/Makefile pro-train/Makefile klm/util/Makefile klm/lm/Makefile mira/Makefile gi/pyp-topics/src/Makefile gi/clda/src/Makefile)
+AC_OUTPUT(Makefile utils/Makefile mteval/Makefile extools/Makefile decoder/Makefile phrasinator/Makefile training/Makefile vest/Makefile pro-train/Makefile klm/util/Makefile klm/lm/Makefile mira/Makefile gi/pyp-topics/src/Makefile gi/clda/src/Makefile gi/cbgi/Makefile gi/ml/Makefile)
diff --git a/m4/gtest.m4 b/m4/gtest.m4
index b015ddeb..28ccd2de 100644
--- a/m4/gtest.m4
+++ b/m4/gtest.m4
@@ -12,10 +12,10 @@ AC_DEFUN([GTEST_LIB_CHECK],
 dnl Provide a flag to enable or disable Google Test usage.
 AC_ARG_ENABLE([gtest],
   [AS_HELP_STRING([--enable-gtest],
-                  [Enable tests using the Google C++ Testing Framework.]
-                  [(Default is enabled.)])],
+                  [Enable tests using the Google C++ Testing Framework.
+                  (Default is enabled.)])],
   [],
-  [enable_gtest=check])
+  [enable_gtest=])
 AC_ARG_VAR([GTEST_CONFIG],
            [The exact path of Google Test's 'gtest-config' script.])
 AC_ARG_VAR([GTEST_CPPFLAGS],
@@ -29,33 +29,46 @@ AC_ARG_VAR([GTEST_LIBS],
 AC_ARG_VAR([GTEST_VERSION],
            [The version of Google Test available.])
 HAVE_GTEST="no"
-AS_IF([test "x$enable_gtest" != "xno"],
-  [AC_PATH_PROG([GTEST_CONFIG], [gtest-config])
-   AS_IF([test -x "$GTEST_CONFIG"],
-     [AS_IF([test "x$1" != "x"],
-        [_min_version="--min-version=$1"
+AS_IF([test "x${enable_gtest}" != "xno"],
+  [AC_MSG_CHECKING([for 'gtest-config'])
+   AS_IF([test "x${enable_gtest}" != "xyes"],
+     [AS_IF([test -x "${enable_gtest}/scripts/gtest-config"],
+        [GTEST_CONFIG="${enable_gtest}/scripts/gtest-config"],
+        [GTEST_CONFIG="${enable_gtest}/bin/gtest-config"])
+      AS_IF([test -x "${GTEST_CONFIG}"], [],
+        [AC_MSG_RESULT([no])
+         AC_MSG_ERROR([dnl
+Unable to locate either a built or installed Google Test.
+The specific location '${enable_gtest}' was provided for a built or installed
+Google Test, but no 'gtest-config' script could be found at this location.])
+         ])],
+     [AC_PATH_PROG([GTEST_CONFIG], [gtest-config])])
+   AS_IF([test -x "${GTEST_CONFIG}"],
+     [AC_MSG_RESULT([${GTEST_CONFIG}])
+      m4_ifval([$1],
+        [_gtest_min_version="--min-version=$1"
          AC_MSG_CHECKING([for Google Test at least version >= $1])],
-        [_min_version="--min-version=0"
+        [_gtest_min_version="--min-version=0"
          AC_MSG_CHECKING([for Google Test])])
-      AS_IF([$GTEST_CONFIG $_min_version],
+      AS_IF([${GTEST_CONFIG} ${_gtest_min_version}],
         [AC_MSG_RESULT([yes])
-         HAVE_GTEST="yes"],
-        [AC_MSG_RESULT([no])])])
-   AS_IF([test "x$HAVE_GTEST" = "xyes"],
-     [GTEST_CPPFLAGS=$($GTEST_CONFIG --cppflags)
-      GTEST_CXXFLAGS=$($GTEST_CONFIG --cxxflags)
-      GTEST_LDFLAGS=$($GTEST_CONFIG --ldflags)
-      GTEST_LIBS=$($GTEST_CONFIG --libs | sed 's/la/a/')
-      GTEST_VERSION=$($GTEST_CONFIG --version)
+         HAVE_GTEST='yes'],
+        [AC_MSG_RESULT([no])])],
+     [AC_MSG_RESULT([no])])
+   AS_IF([test "x${HAVE_GTEST}" = "xyes"],
+     [GTEST_CPPFLAGS=`${GTEST_CONFIG} --cppflags`
+      GTEST_CXXFLAGS=`${GTEST_CONFIG} --cxxflags`
+      GTEST_LDFLAGS=`${GTEST_CONFIG} --ldflags`
+      GTEST_LIBS=`${GTEST_CONFIG} --libs`
+      GTEST_VERSION=`${GTEST_CONFIG} --version`
       AC_DEFINE([HAVE_GTEST],[1],[Defined when Google Test is available.])],
-     [AS_IF([test "x$enable_gtest" = "xyes"],
-        [AC_MSG_ERROR([
-  The Google C++ Testing Framework was explicitly enabled, but a viable version
-  could not be found on the system.
-])])])])
+     [AS_IF([test "x${enable_gtest}" = "xyes"],
+        [AC_MSG_ERROR([dnl
+Google Test was enabled, but no viable version could be found.])
+         ])])])
 AC_SUBST([HAVE_GTEST])
 AM_CONDITIONAL([HAVE_GTEST],[test "x$HAVE_GTEST" = "xyes"])
-AS_IF([test "x$HAVE_GTEST" = "xyes"],
-  [AS_IF([test "x$2" != "x"],[$2],[:])],
-  [AS_IF([test "x$3" != "x"],[$3],[:])])
+dnl AS_IF([test "x$HAVE_GTEST" = "xyes"], [] [])
+dnl   [m4_ifval([$2], [$2])],
+dnl   [m4_ifval([$3], [$3])])
 ])
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