FYI: clean testsuite for g++ and gcc -Wall

[Ralf Wildenhues]

Applied to HEAD.

The failure of the link-order2 test with g++ shows how limited this
usage case is.  :-/

Cheers,
Ralf

2006-12-14  Ralf Wildenhues  <address@hidden>

        * tests/link-order2.at: Define our override `sin' function with
        C binding even if $CC is a C++ compiler.  Skip the test with g++
        as its command line driver reorders `-lm'.
        * tests/search-path.at: Declare `inflate' with C binding.
        * tests/stresstest.at: Avoid unused variable warnings.

Index: tests/link-order2.at
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/link-order2.at,v
retrieving revision 1.3
diff -u -r1.3 link-order2.at
--- tests/link-order2.at        7 Nov 2006 17:53:22 -0000       1.3
+++ tests/link-order2.at        14 Dec 2006 20:58:54 -0000
@@ -24,6 +24,16 @@
 
 AT_SETUP([Link order of deplibs.])
 AT_KEYWORDS([libtool])
+
+# g++ reorders `-lm' on the command line.  :-(
+AT_DATA([t.c], [[
+#if defined(__cplusplus) && defined(__GNUC__)
+choke me
+#endif
+int t = 42;
+]])
+AT_CHECK([$CC $CPPFLAGS $CFLAGS -c t.c || exit 77], [], [ignore], [ignore])
+
 LDFLAGS="$LDFLAGS -no-undefined"
 libdir=`pwd`/inst/lib
 bindir=`pwd`/inst/bin
@@ -31,11 +41,17 @@
 
 cat >a.c <<\EOF
 /* pretend we have a better sine function */
+#ifdef __cplusplus
+extern "C"
+#endif
 double sin (double x) { return 0.0; }
 EOF
 
 cat >b.c <<\EOF
-extern double sin (double);
+#ifdef __cplusplus
+extern "C"
+#endif
+double sin (double);
 double b (double x) { return sin (x); }
 EOF
 
Index: tests/search-path.at
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/search-path.at,v
retrieving revision 1.1
diff -u -r1.1 search-path.at
--- tests/search-path.at        24 Oct 2006 20:17:38 -0000      1.1
+++ tests/search-path.at        14 Dec 2006 20:58:54 -0000
@@ -21,7 +21,11 @@
 LDFLAGS="$LDFLAGS -no-undefined"
 
 AT_DATA([main.c],
-[[extern int inflate ();
+[[extern
+#ifdef __cplusplus
+"C"
+#endif
+int inflate ();
 int main()
 {
   return inflate ();
Index: tests/stresstest.at
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/stresstest.at,v
retrieving revision 1.10
diff -u -r1.10 stresstest.at
--- tests/stresstest.at 4 Sep 2006 17:27:26 -0000       1.10
+++ tests/stresstest.at 14 Dec 2006 20:58:55 -0000
@@ -45,7 +45,7 @@
 const int v6 = 1;
 const char* v7 = "\01foo";
 const char v8[] = "\01bar";
-int v9(void) { return 1; }
+int v9(void) { return v2 + 1; }
 int (*v10) (void);
 int (*v11) (void) = v9;
 int (*const v12) (void) = v9;
@@ -165,7 +165,7 @@
 const int w6 = 1;
 const char* w7 = "\01foo";
 const char w8[] = "\01bar";
-int w9(void) { return 1; }
+int w9(void) { return w2 + 1; }
 int (*w10) (void);
 int (*w11) (void) = w9;
 int (*const w12) (void) = w9;