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RFA: Fix bootstrap/44432
- From: Joern Rennecke <amylaar at spamcop dot net>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 08 Jun 2010 18:48:04 -0400
- Subject: RFA: Fix bootstrap/44432
This adds a check that a trivial source file can be compiled as C++
before invoking ZW_PROG_COMPILER_DEPENDENCIES - the latter macro
was the source of the unhelpful error message.
I have verified that the expected error message appears when doing a
sequential or parallel bootstrap on a machine with the c++ compiler disabled,
and that during bootstrap with the c++ compiler re-enabled, the libcpp
configure succeeds.
2010-06-08 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.
Index: libcpp/configure.ac
===================================================================
--- libcpp/configure.ac (revision 160389)
+++ libcpp/configure.ac (working copy)
@@ -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