gdb: Pass -x c++ to the compiler

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++".

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9062067..2c4f96e 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-06-17  Simon Marchi  <simon.marchi@ericsson.com>
+
+       * Makefile.in (COMPILE.pre): Add "-x c++".
+
 2017-06-16  Alan Hayward  <alan.hayward@arm.com>
            Pedro Alves  <palves@redhat.com>
            Yao Qi  <yao.qi@linaro.org>

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 5e5fcaa..153a5dd 100644 (file)
--- 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/ChangeLog b/gdb/gdbserver/ChangeLog
index 80240ff..eef680c 100644 (file)
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,7 @@
+2017-06-17  Simon Marchi  <simon.marchi@ericsson.com>
+
+       * Makefile.in (COMPILE.pre): Add "-x c++".
+
 2017-06-09  Sergio Durigan Junior  <sergiodj@redhat.com>
 
        * fork-child.c: Conditionally include <signal.h>.

diff --git a/gdb/gdbserver/Makefile.in b/gdb/gdbserver/Makefile.in
index 834425d..4a031e1 100644 (file)
--- 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