[binutils-gdb] gdbserver/Makefile.in: add missing `-x c++`

[Simon Marchi]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c7c9820071f8b81a64221f5cfafb3cbfeafe7916

commit c7c9820071f8b81a64221f5cfafb3cbfeafe7916
Author: Simon Marchi <simon.marchi@efficios.com>
Date:   Mon Mar 25 14:28:00 2024 -0400

    gdbserver/Makefile.in: add missing `-x c++`
    
    When building with Clang, I get:
    
          CXX    nat/x86-linux-tdesc-ipa.o
        clang++: error: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Werror,-Wdeprecated]
    
    Fix that by adding the missing `-x c++` in the rule building
    `gdb/nat/*.c` files for the in-process agent.
    
    Change-Id: Ie53e4b9a8b57bef9669397fdfaf21617107c7180
    Approved-By: Tom Tromey <tom@tromey.com>

Diff:
---
 gdbserver/Makefile.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdbserver/Makefile.in b/gdbserver/Makefile.in
index bd6f68e7f2c..5506701106d 100644
--- a/gdbserver/Makefile.in
+++ b/gdbserver/Makefile.in
@@ -520,7 +520,7 @@ gdbsupport/%-ipa.o: ../gdbsupport/%.cc
 	$(POSTCOMPILE)
 
 nat/%-ipa.o: ../gdb/nat/%.c
-	$(IPAGENT_COMPILE) $<
+	$(IPAGENT_COMPILE) -x c++ $<
 	$(POSTCOMPILE)
 
 %-ipa.o: ../gdb/%.c