LGTM.  I think we build the main notmuch binary with g++ for the same
reason.

Quoth Peter Feigl on Dec 04 at  2:47 pm:
> Without this change, GCC complains as follows:
> gcc  test/random-corpus.o test/database-test.o notmuch-config.o command-line-arguments.o lib/libnotmuch.a util/libutil.a parse-time-string/libparse-time-string.a -o test/random-corpus -lgmime-2.6 -lgio-2.0 -lgobject-2.0 -lglib-2.0   -Wl,-rpath,/usr/lib -ltalloc   -lxapian
> /usr/bin/ld: lib/libnotmuch.a(database.o): undefined reference to symbol '_ZNSs4_Rep10_M_destroyERKSaIcE@@GLIBCXX_3.4'
> /usr/bin/ld: note: '_ZNSs4_Rep10_M_destroyERKSaIcE@@GLIBCXX_3.4' is defined in DSO /usr/lib/libstdc++.so.6 so try adding it to the linker command line
> /usr/lib/libstdc++.so.6: could not read symbols: Invalid operation
> collect2: error: ld returned 1 exit status
> make: *** [test/random-corpus] Error 1
> ---
>  test/Makefile.local | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/test/Makefile.local b/test/Makefile.local
> index 6a9f15e..2ec6595 100644
> --- a/test/Makefile.local
> +++ b/test/Makefile.local
> @@ -22,7 +22,7 @@ random_corpus_deps =  $(dir)/random-corpus.o  $(dir)/database-test.o \
>  			parse-time-string/libparse-time-string.a
>  
>  $(dir)/random-corpus: $(random_corpus_deps)
> -	$(call quiet,CC) $(CFLAGS_FINAL) $^ -o $@ $(CONFIGURE_LDFLAGS)
> +	$(call quiet,CXX) $(CFLAGS_FINAL) $^ -o $@ $(CONFIGURE_LDFLAGS)
>  
>  $(dir)/smtp-dummy: $(smtp_dummy_modules)
>  	$(call quiet,CC) $^ -o $@