[ptxdist] [PATCH 1/3] host-ncurses: Fix build with gcc 5.1

[Bernhard Walle <bernhard@bwalle.de>]

The build of host-ncurses fails with following error:

| In file included from ../ncurses/curses.priv.h:283:0,
|                  from ../ncurses/lib_gen.c:19:
| _16905.c:835:15: error: expected ')' before 'int'
| ../include/curses.h:1594:56: note: in definition of macro 'mouse_trafo'
|  #define mouse_trafo(y,x,to_screen) wmouse_trafo(stdscr,y,x,to_screen)

The problem is that the preprocessor emits additional line statements which
ncurses isn't prepared for. The problem is described in the gcc 5 porting
guide at https://gcc.gnu.org/gcc-5/porting_to.html. Adding the described
-P option to gcc invocations fixes that issue.

Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
---
 rules/host-ncurses.make | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rules/host-ncurses.make b/rules/host-ncurses.make
index 2218b7c..67dbf5b 100644
--- a/rules/host-ncurses.make
+++ b/rules/host-ncurses.make
@@ -21,6 +21,9 @@ HOST_PACKAGES-$(PTXCONF_HOST_NCURSES) += host-ncurses
 # autoconf
 #
 HOST_NCURSES_CONF_TOOL	:= autoconf
+HOST_NCURSES_CONF_ENV := \
+	$(HOST_ENV) \
+	CPPFLAGS="-P"
 HOST_NCURSES_CONF_OPT	= \
 	$(HOST_AUTOCONF) \
 	$(NCURSES_AUTOCONF_SHARED)
-- 
2.3.7


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