Fix compilation errors of C++ tests on Solaris 10 with Sun C++

[Bruno Haible]

Building a testdir on Solaris 10 with the Sun C/C++ compilers, I get these
link errors:

CC -xarch=generic64 -O  -g  -L/home/haible/prefix-x86_64/lib -o test-string-c++ 
test-string-c++.o test-string-c++2.o libtests.a ../gllib/libgnu.a libtests.a 
../gllib/libgnu.a libtests.a  /home/haible/prefix-x86_64/lib/libintl.so 
/home/haible/prefix-x86_64/lib/libiconv.so -R/home/haible/prefix-x86_64/lib  
-lm -lm -lm -lm -lm -lm -lm -lm -lm -lm -lm
Undefined                       first referenced
 symbol                             in file
uc_width                            ../gllib/libgnu.a(wcwidth.o)
ld: fatal: symbol referencing errors. No output written to test-string-c++
gmake[4]: *** [Makefile:19860: test-string-c++] Error 1

CC -xarch=generic64 -O  -g  -L/home/haible/prefix-x86_64/lib -o test-wchar-c++ 
test-wchar-c++.o test-wchar-c++2.o test-wchar-c++3.o libtests.a 
../gllib/libgnu.a libtests.a ../gllib/libgnu.a libtests.a  
/home/haible/prefix-x86_64/lib/libintl.so 
/home/haible/prefix-x86_64/lib/libiconv.so -R/home/haible/prefix-x86_64/lib 
-lrt   -lm -lm -lm -lm -lm -lm -lm -lm -lm -lm -lm
Undefined                       first referenced
 symbol                             in file
uc_width                            ../gllib/libgnu.a(wcwidth.o)
ld: fatal: symbol referencing errors. No output written to test-wchar-c++
gmake[4]: *** [Makefile:21804: test-wchar-c++] Error 1

The following patch fixes it.


2022-09-03  Bruno Haible  <bruno@clisp.org>

        Fix compilation errors of C++ tests on Solaris 10 with Sun C++.
        * modules/string-c++-tests (Makefile.am): Link test-string-c++ with
        $(LIBUNISTRING).
        * modules/wchar-c++-tests (Makefile.am): Link test-wchar-c++ with
        $(LIBUNISTRING).

diff --git a/modules/string-c++-tests b/modules/string-c++-tests
index bd813bd892..10d117fa90 100644
--- a/modules/string-c++-tests
+++ b/modules/string-c++-tests
@@ -16,5 +16,5 @@ if ANSICXX
 TESTS += test-string-c++
 check_PROGRAMS += test-string-c++
 test_string_c___SOURCES = test-string-c++.cc test-string-c++2.cc
-test_string_c___LDADD = $(LDADD) $(LIBINTL) $(LIBTHREAD)
+test_string_c___LDADD = $(LDADD) $(LIBUNISTRING) $(LIBINTL) $(LIBTHREAD)
 endif
diff --git a/modules/wchar-c++-tests b/modules/wchar-c++-tests
index a91e43aec4..93135d5347 100644
--- a/modules/wchar-c++-tests
+++ b/modules/wchar-c++-tests
@@ -17,5 +17,5 @@ if ANSICXX
 TESTS += test-wchar-c++
 check_PROGRAMS += test-wchar-c++
 test_wchar_c___SOURCES = test-wchar-c++.cc test-wchar-c++2.cc 
test-wchar-c++3.cc
-test_wchar_c___LDADD = $(LDADD) $(LIBINTL) $(LIB_NANOSLEEP) $(LIB_EACCESS) 
$(LIBTHREAD)
+test_wchar_c___LDADD = $(LDADD) $(LIBUNISTRING) $(LIBINTL) $(LIB_NANOSLEEP) 
$(LIB_EACCESS) $(LIBTHREAD)
 endif