[PATCH 1/5] gdb: Pass -x c++ to the compiler

[Simon Marchi <simon.marchi@ericsson.com>]

Because we are compiling .c files containing C++ code, clang++ complains
with:

  clang: error: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated

If renaming all the source files to .cpp is out of the question, an
alternative is to pass "-x c++" to convince the compiler that we are
really compiling C++.  It works fine with GCC too.

gdb/ChangeLog:

	* Makefile.in (COMPILE.pre): Add "-x c++".

gdb/gdbserver/ChangeLog:

	* Makefile.in (COMPILE.pre): Add "-x c++".
---
 gdb/Makefile.in           | 2 +-
 gdb/gdbserver/Makefile.in | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 5e5fcaa..153a5dd 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -114,7 +114,7 @@ depcomp = $(SHELL) $(srcdir)/../depcomp
 
 # Note that these are overridden by GNU make-specific code below if
 # GNU make is used.  The overrides implement dependency tracking.
-COMPILE.pre = $(CXX) $(CXX_DIALECT)
+COMPILE.pre = $(CXX) -x c++ $(CXX_DIALECT)
 COMPILE.post = -c -o $@
 COMPILE = $(COMPILE.pre) $(INTERNAL_CFLAGS) $(COMPILE.post)
 POSTCOMPILE = @true
diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 834425d..4a031e1 100644
--- a/gdb/gdbserver/Makefile.in
+++ b/gdb/gdbserver/Makefile.in
@@ -65,7 +65,7 @@ depcomp = $(SHELL) $(srcdir)/../depcomp
 
 # Note that these are overridden by GNU make-specific code below if
 # GNU make is used.  The overrides implement dependency tracking.
-COMPILE.pre = $(CXX) $(CXX_DIALECT)
+COMPILE.pre = $(CXX) -x c++ $(CXX_DIALECT)
 COMPILE.post = -c -o $@
 COMPILE = $(COMPILE.pre) $(INTERNAL_CFLAGS) $(COMPILE.post)
 POSTCOMPILE = @true
-- 
2.7.4