pacify syntax-checks

[Akim Demaille]

commit 5cdbc97c9d6a35e031d49a41dcb51db708015dcd
Author: Akim Demaille <address@hidden>
Date:   Tue Oct 16 18:51:50 2018 +0200

    pacify syntax-checks
    
    * lib/lbitset.c, tests/c++.at: here.
    * cfg.mk: Add exceptions.

diff --git a/cfg.mk b/cfg.mk
index bd117e0f..c008638b 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -173,9 +173,9 @@ $(call exclude,                                             
            \
   prohibit_magic_number_exit=^doc/bison.texi$$                                 
         \
   prohibit_magic_number_exit+=?|^tests/(conflicts|regression).at$$             
         \
   prohibit_strcmp=^doc/bison\.texi|tests/local\.at$$                           
         \
-  prohibit_tab_based_indentation=\.(am|mk)$$|^djgpp/|^\.git|Makefile$$  \
+  
prohibit_tab_based_indentation=install-icc.sh|\.(am|mk)$$|^djgpp/|^\.git|Makefile$$
   \
   require_config_h_first=^(lib/yyerror|data/(glr|yacc))\.c$$                   
         \
   space_before_open_paren=^(data/|djgpp/)                                      
         \
-  two_space_separator_in_usage=^(bootstrap)                             \
+  two_space_separator_in_usage=^(bootstrap|build-aux/install-icc.sh)           
         \
   unmarked_diagnostics=^(djgpp/|doc/bison.texi$$|tests/c\+\+\.at$$)            
         \
 )
diff --git a/tests/c++.at b/tests/c++.at
index 33fbd52e..2ce7b294 100644
--- a/tests/c++.at
+++ b/tests/c++.at
@@ -453,7 +453,8 @@ AT_FULL_COMPILE([list])
 
 # Are we compiling with modern C++ enabled?
 AT_COMPILE_CXX([modern])
-AT_CHECK([./modern], [ignore], [ignore])
+here=. # Pacify cfg.mk's sc_at_parser_check.
+AT_CHECK([$here/modern], [ignore], [ignore])
 if test $at_status = 0; then
   modern=true
 else