Fix tui compilation with Solaris libcurses (PR tui/21482)

[Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>]

On both mainline and the 8.0 branch, gdb compilation fails on Solaris 10
with the native libcurses:

* Initially, compilation failed like this:

In file included from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/gdb_curses.h:42:
0,
                 from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-data.h:2
6,
                 from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-disasm.c
:31:
/vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-disasm.c: In function ‘CORE_A
DDR tui_disassemble(gdbarch*, tui_asm_line*, CORE_ADDR, int)’:
/vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-disasm.c:71:19: error: ‘class
 string_file’ has no member named ‘wclear’; did you mean ‘clear’?
       gdb_dis_out.clear ();
                   ^
/vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-disasm.c:78:19: error: ‘class
 string_file’ has no member named ‘wclear’; did you mean ‘clear’?
       gdb_dis_out.clear ();
                   ^
make[2]: *** [Makefile:1927: tui-disasm.o] Error 1

  It turned out this happens because <curses.h> has

#define clear()         wclear(stdscr)

  This can be avoided by defining NOMACROS, which the patch below does
  for solaris2.*.

* Even with this workaround, compilation fails in gdb/tui for several
  instances of the same problem:

/vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-winsource.c: In function ‘void tui_erase_source_content(tui_win_info*, int)’:
/vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-winsource.c:257:18: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive]
        no_src_str);
                  ^
In file included from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/gdb_curses.h:42:0,
                 from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-data.h:26,
                 from /vol/src/gnu/gdb/gdb-8.0-branch/local/gdb/tui/tui-winsource.c:33:
/vol/gcc-7/lib/gcc/sparc-sun-solaris2.10/7.1.0/include-fixed/curses.h:699:12: note:   initializing argument 4 of ‘int mvwaddstr(WINDOW*, int, int, char*)’
 extern int mvwaddstr(WINDOW *, int, int, char *);
            ^~~~~~~~~
make[2]: *** [Makefile:1927: tui-winsource.o] Error 1

  Unlike ncurses, <curses.h> declares 

extern int mvwaddstr(WINDOW *, int, int, char *);

  i.e. the last arg is char *, not const char *.

  The patch fixes this by casting the last arg to mvwaddstr to char *,
  as was recently done on mainline in a newterm() call (the only
  difference between 8.0 and mainline gdb/tui).

With those changes, gdb on the 8.0 branch compiles cleanly on
sparcv9-sun-solaris2.10 with native curses and amd64-pc-solaris2.12
with bundled ncurses (well, almost: on Solaris 12 ncurses in
/usr/include is used, but gdb linked against -lcurses which fails:

Undefined                       first referenced
 symbol                             in file
wattr_on                            tui-wingeneral.o
wattr_off                           tui-wingeneral.o

but that's a different and preexisting problem).

Ok for mainline and 8.0 branch?

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2017-05-17  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	PR tui/21482
	* configure.ac <solaris2.*> (NOMACROS): Define.
	* configure: Regenerate.
	* config.in: Regenerate.

	* tui/tui-windata.c (tui_erase_data_content): Cast last mvwaddstr
	to char *.
	* tui/tui-wingeneral.c (box_win): Likewise.
	* tui/tui-winsource.c (tui_erase_source_content): Likewise.
	(tui_show_source_line): Likewise.
	(tui_show_exec_info_content): Likewise.

# HG changeset patch
# Parent  bfb43bbf7ca9808a9e660c111b68eef77999e76c
Fix tui compilation with Solaris libcurses (PR tui/21482)

diff --git a/gdb/configure.ac b/gdb/configure.ac
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1312,6 +1312,14 @@ case $host_os in
    Solaris 2.[789] when using GCC. ])
     fi ;;
 esac
+# On Solaris, we need to define NOMACROS so the native <curses.h> doesn't
+# define clear which interferes with the clear member of class string_file.
+case $host_os in
+  solaris2.*)
+    AC_DEFINE(NOMACROS, 1,
+      [Define to 1 to avoid <curses.h> defining clear which interferes with class string_file. ])
+    ;;
+esac
 AC_CHECK_HEADERS(curses.h cursesX.h ncurses.h ncurses/ncurses.h ncurses/term.h)
 AC_CHECK_HEADERS(term.h, [], [],
 [#if HAVE_CURSES_H
diff --git a/gdb/tui/tui-windata.c b/gdb/tui/tui-windata.c
--- a/gdb/tui/tui-windata.c
+++ b/gdb/tui/tui-windata.c
@@ -117,7 +117,7 @@ tui_erase_data_content (const char *prom
       mvwaddstr (TUI_DATA_WIN->generic.handle,
 		 (TUI_DATA_WIN->generic.height / 2),
 		 x_pos,
-		 prompt);
+		 (char *) prompt);
     }
   wrefresh (TUI_DATA_WIN->generic.handle);
 }
diff --git a/gdb/tui/tui-wingeneral.c b/gdb/tui/tui-wingeneral.c
--- a/gdb/tui/tui-wingeneral.c
+++ b/gdb/tui/tui-wingeneral.c
@@ -101,7 +101,7 @@ box_win (struct tui_gen_win_info *win_in
       box (win, tui_border_vline, tui_border_hline);
 #endif
       if (win_info->title)
-        mvwaddstr (win, 0, 3, win_info->title);
+        mvwaddstr (win, 0, 3, (char *) win_info->title);
       wattroff (win, attrs);
     }
 }
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -254,7 +254,7 @@ tui_erase_source_content (struct tui_win
 	  mvwaddstr (win_info->generic.handle,
 		     (win_info->generic.height / 2),
 		     x_pos,
-		     no_src_str);
+		     (char *) no_src_str);
 
 	  /* elz: Added this function call to set the real contents of
 	     the window to what is on the screen, so that later calls
@@ -280,7 +280,7 @@ tui_show_source_line (struct tui_win_inf
     wattron (win_info->generic.handle, A_STANDOUT);
 
   mvwaddstr (win_info->generic.handle, lineno, 1,
-             line->which_element.source.line);
+             (char *) line->which_element.source.line);
   if (line->which_element.source.is_exec_point)
     wattroff (win_info->generic.handle, A_STANDOUT);
 
@@ -565,7 +565,8 @@ tui_show_exec_info_content (struct tui_w
     mvwaddstr (exec_info->handle,
 	       cur_line,
 	       0,
-	       exec_info->content[cur_line - 1]->which_element.simple_string);
+	       (char *) exec_info->content[cur_line - 1]
+			  ->which_element.simple_string);
   tui_refresh_win (exec_info);
   exec_info->content_in_use = TRUE;
 }