Import vsnprintf from libiberty if not available.

vasprintf and vsnprintf are not available on LynxOS, at least not on
version 4.0.0.  This patch updates the configury to import them from
libiberty if not available out of the box.

gdbserver/
        * Makefile.in (vasprintf.o, vsnprintf.o): New rules.
        * configure.ac: Add check for vasprintf and vsnprintf.
        * configure, config.in: Regenerate.
        * server.h (vasprintf, vsnprintf): Add conditional declarations.

6 files changed, 65 insertions, 6 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 71e878d..e6ab46f 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,5 +1,12 @@
 2010-09-01  Joel Brobecker  <brobecker@adacore.com>
 
+	* Makefile.in (vasprintf.o, vsnprintf.o): New rules.
+	* configure.ac: Add check for vasprintf and vsnprintf.
+	* configure, config.in: Regenerate.
+	* server.h (vasprintf, vsnprintf): Add conditional declarations.
+
+2010-09-01  Joel Brobecker  <brobecker@adacore.com>
+
 	* gdbreplay.c: Move include of alloca.h up, next to include of
 	malloc.h.
 	* server.h: Add include of malloc.h.
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 2f05c72..a12d895 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -357,6 +357,15 @@ signals.o: ../common/signals.c $(server_h) $(signals_def)
 memmem.o: ../gnulib/memmem.c
 	$(CC) -o memmem.o -c $(CPPFLAGS) $(INTERNAL_WARN_CFLAGS) $<
 
+# We build vasprintf with -DHAVE_CONFIG_H because we want that unit to
+# include our config.h file.  Otherwise, some system headers do not get
+# included, and the compiler emits a warning about implicitly defined
+# functions (missing declaration).
+vasprintf.o: $(srcdir)/../../libiberty/vasprintf.c
+	$(CC) -o vasprintf.o -c $(CPPFLAGS) $(INTERNAL_CFLAGS) -DHAVE_CONFIG_H $<
+vsnprintf.o: $(srcdir)/../../libiberty/vsnprintf.c
+	$(CC) -o vsnprintf.o -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $<
+
 i386_low_h = $(srcdir)/i386-low.h
 
 i386-low.o: i386-low.c $(i386_low_h) $(server_h) $(target_h)
diff --git a/gdb/gdbserver/config.in b/gdb/gdbserver/config.in
index a6a9704..909dcb9 100644
--- a/gdb/gdbserver/config.in
+++ b/gdb/gdbserver/config.in
@@ -30,6 +30,14 @@
    don't. */
 #undef HAVE_DECL_STRERROR
 
+/* Define to 1 if you have the declaration of `vasprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_VASPRINTF
+
+/* Define to 1 if you have the declaration of `vsnprintf', and to 0 if you
+   don't. */
+#undef HAVE_DECL_VSNPRINTF
+
 /* Define to 1 if you have the `dladdr' function. */
 #undef HAVE_DLADDR
 
@@ -172,6 +180,12 @@
 /* Define if UST is available */
 #undef HAVE_UST
 
+/* Define to 1 if you have the `vasprintf' function. */
+#undef HAVE_VASPRINTF
+
+/* Define to 1 if you have the `vsnprintf' function. */
+#undef HAVE_VSNPRINTF
+
 /* Checking if errno must be defined */
 #undef MUST_DEFINE_ERRNO
 
diff --git a/gdb/gdbserver/configure b/gdb/gdbserver/configure
index 05a4eba..957cbc8 100755
--- a/gdb/gdbserver/configure
+++ b/gdb/gdbserver/configure
@@ -4014,12 +4014,14 @@ _ACEOF
 fi
 done
 
-for ac_func in memmem
+for ac_func in memmem vasprintf vsnprintf
 do :
-  ac_fn_c_check_func "$LINENO" "memmem" "ac_cv_func_memmem"
-if test "x$ac_cv_func_memmem" = x""yes; then :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+eval as_val=\$$as_ac_var
+   if test "x$as_val" = x""yes; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_MEMMEM 1
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
 
 else
@@ -4274,6 +4276,26 @@ fi
 cat >>confdefs.h <<_ACEOF
 #define HAVE_DECL_MEMMEM $ac_have_decl
 _ACEOF
+ac_fn_c_check_decl "$LINENO" "vasprintf" "ac_cv_have_decl_vasprintf" "$ac_includes_default"
+if test "x$ac_cv_have_decl_vasprintf" = x""yes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_VASPRINTF $ac_have_decl
+_ACEOF
+ac_fn_c_check_decl "$LINENO" "vsnprintf" "ac_cv_have_decl_vsnprintf" "$ac_includes_default"
+if test "x$ac_cv_have_decl_vsnprintf" = x""yes; then :
+  ac_have_decl=1
+else
+  ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_VSNPRINTF $ac_have_decl
+_ACEOF
 
 
 ac_fn_c_check_type "$LINENO" "socklen_t" "ac_cv_type_socklen_t" "#include <sys/types.h>
diff --git a/gdb/gdbserver/configure.ac b/gdb/gdbserver/configure.ac
index bc3bb11..c61ab54 100644
--- a/gdb/gdbserver/configure.ac
+++ b/gdb/gdbserver/configure.ac
@@ -44,7 +44,7 @@ AC_CHECK_HEADERS(sgtty.h termio.h termios.h sys/reg.h string.h dnl
 		 sys/ioctl.h netinet/in.h sys/socket.h netdb.h dnl
 		 netinet/tcp.h arpa/inet.h sys/wait.h)
 AC_CHECK_FUNCS(pread pwrite pread64)
-AC_REPLACE_FUNCS(memmem)
+AC_REPLACE_FUNCS(memmem vasprintf vsnprintf)
 
 # Check for UST
 ustlibs=""
@@ -161,7 +161,7 @@ AC_TRY_LINK([
   [AC_MSG_RESULT(no)])
 fi
 
-AC_CHECK_DECLS([strerror, perror, memmem])
+AC_CHECK_DECLS([strerror, perror, memmem, vasprintf, vsnprintf])
 
 AC_CHECK_TYPES(socklen_t, [], [],
 [#include <sys/types.h>
diff --git a/gdb/gdbserver/server.h b/gdb/gdbserver/server.h
index d5f32e8..d007107 100644
--- a/gdb/gdbserver/server.h
+++ b/gdb/gdbserver/server.h
@@ -63,6 +63,13 @@ extern void perror (const char *);
 extern void *memmem (const void *, size_t , const void *, size_t);
 #endif
 
+#if !HAVE_DECL_VASPRINTF
+extern int vasprintf(char **strp, const char *fmt, va_list ap);
+#endif
+#if !HAVE_DECL_VSNPRINTF
+int vsnprintf(char *str, size_t size, const char *format, va_list ap);
+#endif
+
 #ifndef ATTR_NORETURN
 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 #define ATTR_NORETURN __attribute__ ((noreturn))