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changeset 39177:8b7883612bf4

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no-c++: Avoid "egrep: repetition-operator operand invalid" error. * m4/no-c++.m4 (gt_NO_CXX): Don't use '+' characters nor spaces in the AC_EGREP_CPP pattern.
author Sam Steingold <sds@gnu.org>
date Tue, 05 Dec 2017 11:02:33 -0500
parents 8ee9e5707f73
children 81d47bfd0911
files ChangeLog m4/no-c++.m4
diffstat 2 files changed, 11 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/ChangeLog	Sun Dec 03 23:35:26 2017 +0100
+++ b/ChangeLog	Tue Dec 05 11:02:33 2017 -0500
@@ -1,3 +1,10 @@
+2017-12-05  Sam Steingold  <sds@gnu.org>
+            Bruno Haible  <bruno@clisp.org>
+
+	no-c++: Avoid "egrep: repetition-operator operand invalid" error.
+	* m4/no-c++.m4 (gt_NO_CXX): Don't use '+' characters nor spaces in the
+	AC_EGREP_CPP pattern.
+
 2017-12-03  Bruno Haible  <bruno@clisp.org>
 
 	all: Replace more http URLs by https URLs.
--- a/m4/no-c++.m4	Sun Dec 03 23:35:26 2017 +0100
+++ b/m4/no-c++.m4	Tue Dec 05 11:02:33 2017 -0500
@@ -1,4 +1,4 @@
-# no-c++.m4 serial 1
+# no-c++.m4 serial 2
 dnl Copyright (C) 2006, 2009-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,14 +7,14 @@
 # Support for C source files that cannot be compiled by a C++ compiler.
 # Set NO_CXX to the C++ compiler flags needed to request C mode instead of
 # C++ mode.
-# So far only g++ is supported.
+# So far only g++ is supported. This includes clang++, as it is g++ compatible.
 
 AC_DEFUN([gt_NO_CXX],
 [
   NO_CXX=
-  AC_EGREP_CPP([Is g++], [
+  AC_EGREP_CPP([Is_g_plus_plus], [
 #if defined __GNUC__ && defined __cplusplus
-  Is g++
+  Is_g_plus_plus
 #endif
     ],
     [NO_CXX="-x c"])