PR bootstrap/44432

	* configure.ac: Before using ZW_PROG_COMPILER_DEPENDENCIES for C++,
	check that C++ compiler works.
	* configure: Regenerate.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@160460 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index 84201a4..d6d9b6c 100644 (file)
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,10 @@
+2010-06-09  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+       PR bootstrap/44432
+       * configure.ac: Before using ZW_PROG_COMPILER_DEPENDENCIES for C++,
+       check that C++ compiler works.
+       * configure: Regenerate.
+
 2010-06-08  Laurynas Biveinis  <laurynas.biveinis@gmail.com>
 
        * include/symtab.h (ht_identifier_ptr): New.

diff --git a/libcpp/configure b/libcpp/configure
index cf17de4..a4700e6 100755 (executable)
--- a/libcpp/configure
+++ b/libcpp/configure
@@ -4400,6 +4400,29 @@ else CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
 fi
 
 else
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int i;
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+
+else
+  as_fn_error "C++ compiler missing or inoperational" "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
 depcc="$CXX"  am_compiler_list=
 
 am_depcomp=$ac_aux_dir/depcomp
@@ -4997,8 +5020,7 @@ ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
-
-ac_ext=cpp
+   ac_ext=cpp
 ac_cpp='$CXXCPP $CPPFLAGS'
 ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'

diff --git a/libcpp/configure.ac b/libcpp/configure.ac
index 9dcec23..ceea29c 100644 (file)
--- a/libcpp/configure.ac
+++ b/libcpp/configure.ac
@@ -45,6 +45,10 @@ ZW_CREATE_DEPDIR
 if test "$ENABLE_BUILD_WITH_CXX" = "no"; then
 ZW_PROG_COMPILER_DEPENDENCIES([CC])
 else
+AC_LANG_PUSH([C++])
+AC_COMPILE_IFELSE([[int i;]], [],
+                 [AC_MSG_ERROR([C++ compiler missing or inoperational])])
+AC_LANG_POP([C++])
 ZW_PROG_COMPILER_DEPENDENCIES([CXX])
 fi