[gcc(refs/users/wschmidt/heads/builtins10)] rs6000: Add file support and functions for diagnostic support

[William Schmidt <wschmidt@gcc.gnu.org>]

https://gcc.gnu.org/g:d6e8d3a938f48ec7fc020a09814516a735bb281a

commit d6e8d3a938f48ec7fc020a09814516a735bb281a
Author: Bill Schmidt <wschmidt@linux.ibm.com>
Date:   Wed Mar 3 11:54:01 2021 -0600

    rs6000: Add file support and functions for diagnostic support
    
    2021-03-03  Bill Schmidt  <wschmidt@linux.ibm.com>
    
    gcc/
            * config/rs6000/rs6000-gen-builtins.c (bif_file): New filescope
            variable.
            (ovld_file): Likewise.
            (header_file): Likewise.
            (init_file): Likewise.
            (defines_file): Likewise.
            (pgm_path): Likewise.
            (bif_path): Likewise.
            (ovld_path): Likewise.
            (header_path): Likewise.
            (init_path): Likewise.
            (defines_path): Likewise.
            (LINELEN): New defined constant.
            (linebuf): New filescope variable.
            (line): Likewise.
            (pos): Likewise.
            (diag): Likewise.
            (bif_diag): New function.
            (ovld_diag): Likewise.

Diff:
---
 gcc/config/rs6000/rs6000-gen-builtins.c | 47 +++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c
index 1a1b5e5e981..32bb231f2e3 100644
--- a/gcc/config/rs6000/rs6000-gen-builtins.c
+++ b/gcc/config/rs6000/rs6000-gen-builtins.c
@@ -162,3 +162,50 @@ along with GCC; see the file COPYING3.  If not see
 #include <string.h>
 #include <assert.h>
 #include <unistd.h>
+
+/* Input and output file descriptors and pathnames.  */
+static FILE *bif_file;
+static FILE *ovld_file;
+static FILE *header_file;
+static FILE *init_file;
+static FILE *defines_file;
+
+static const char *pgm_path;
+static const char *bif_path;
+static const char *ovld_path;
+static const char *header_path;
+static const char *init_path;
+static const char *defines_path;
+
+/* Position information.  Note that "pos" is zero-indexed, but users
+   expect one-indexed column information, so representations of "pos"
+   as columns in diagnostic messages must be adjusted.  */
+#define LINELEN 1024
+static char linebuf[LINELEN];
+static int line;
+static int pos;
+
+/* Pointer to a diagnostic function.  */
+void (*diag) (const char *, ...) __attribute__ ((format (printf, 1, 2)))
+  = NULL;
+
+/* Custom diagnostics.  */
+static void __attribute__ ((format (printf, 1, 2)))
+bif_diag (const char * fmt, ...)
+{
+  va_list args;
+  fprintf (stderr, "%s:%d: ", bif_path, line);
+  va_start (args, fmt);
+  vfprintf (stderr, fmt, args);
+  va_end (args);
+}
+
+static void __attribute__ ((format (printf, 1, 2)))
+ovld_diag (const char * fmt, ...)
+{
+  va_list args;
+  fprintf (stderr, "%s:%d: ", ovld_path, line);
+  va_start (args, fmt);
+  vfprintf (stderr, fmt, args);
+  va_end (args);
+}