mkvtoolnix/ac/gtest.m4

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AC_DEFUN([AX_GTEST],[
GTEST_TYPE=system
CPPFLAGS_SAVED="$CPPFLAGS"
AC_LANG_PUSH(C++)
AC_CHECK_LIB([gtest_main],[main],[true],[GTEST_TYPE=no],[-lpthread])
AC_CHECK_HEADERS([gtest/gtest.h],[true],[GTEST_TYPE=no])
if test $GTEST_TYPE = no && test -d lib/gtest/include && test -d lib/gtest/src ; then
AC_MSG_CHECKING(for internal gtest)
AC_CACHE_VAL(ax_cv_gtest_internal,[
CPPFLAGS="$CPPFLAGS_SAVED -Ilib/gtest/include"
AC_TRY_COMPILE([#include <gtest/gtest.h>],,ax_cv_gtest_internal=yes,ax_cv_gtest_internal=no)
])
AC_MSG_RESULT($ax_cv_gtest_internal)
if test x$ax_cv_gtest_internal=yes; then
GTEST_TYPE=internal
fi
fi
AC_LANG_POP
CPPFLAGS="$CPPFLAGS_SAVED"
AC_SUBST(GTEST_TYPE)
])
AX_GTEST
AC_PATH_PROG(VALGRIND, valgrind,, $PATH)