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-rw-r--r--isomac.c138
1 files changed, 114 insertions, 24 deletions
diff --git a/isomac.c b/isomac.c
index fc6de89..11d0ecd 100644
--- a/isomac.c
+++ b/isomac.c
@@ -67,6 +67,10 @@
will see messages about iso646.h, wctype.h and wchar.h not being
found. */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -168,18 +172,28 @@ static char *macros[] =
#define NUMBER_OF_SUFFIXES (sizeof suffix / sizeof *suffix)
#define NUMBER_OF_MACROS (sizeof macros / sizeof *macros)
+
+/* Format string to build command to invoke compiler. */
+static const char fmt[] = "\
+echo \"#include <%s>\" |\
+%s -E -dM -ansi -pedantic %s -D_LIBC -I. -I `%s --print-prog-name=include` -\
+> %s";
+
+
/* The compiler we use (given on the command line). */
char *CC;
/* The -I parameters for CC to find all headers. */
char *INC;
-static int check_header (const char *);
+static const char **get_null_defines (void);
+static int check_header (const char *, const char **);
int
main (int argc, char *argv[])
{
int h;
int result = 0;
+ const char **ignore_list;
CC = argc > 1 ? argv[1] : "gcc";
INC = argc > 2 ? argv[2] : "";
@@ -190,44 +204,107 @@ main (int argc, char *argv[])
return EXIT_FAILURE;
}
+ /* First get list of symbols which are defined by the compiler. */
+ ignore_list = get_null_defines ();
+
for (h = 0; h < NUMBER_OF_HEADERS; ++h)
{
char file_name[HEADER_MAX];
sprintf (file_name, "%s.h", header[h]);
- result |= check_header (file_name);
+ result |= check_header (file_name, ignore_list);
}
-
-#if 0
/* The test suite should return errors but for now this is not
practical. Give a warning and ask the user to correct the bugs. */
return result;
-#else
- if (result)
- fputs ("\
-##########################################################################\n\
-# The test suite found some problems with your system (see the generated #\n\
-# isomac.out file). These are all violations of the ISO C rules and #\n\
-# should be corrected. If the problem is in the libc, report it using #\n\
-# the glibcbug script to <bugs@gnu.ai.mit.edu>. If it is a problem with #\n\
-# your compiler, contact the compiler manufacturer. #\n\
-##########################################################################\n",
- stderr);
-
- return 0;
-#endif
}
+
+static const char **
+get_null_defines (void)
+{
+ char line[BUFSIZ], *command;
+ char **result = NULL;
+ size_t result_len = 0;
+ size_t result_max = 0;
+ FILE *input;
+ int first = 1;
+
+ command = malloc (sizeof fmt + sizeof "/dev/null" + 2 * strlen (CC)
+ + strlen (INC) + strlen (TMPFILE));
+
+ if (command == NULL)
+ {
+ puts ("No more memory.");
+ exit (1);
+ }
+
+ sprintf (command, fmt, "/dev/null", CC, INC, CC, TMPFILE);
+
+ if (system (command))
+ {
+ puts ("system() returned nonzero");
+ return NULL;
+ }
+ free (command);
+ input = fopen (TMPFILE, "r");
+
+ if (input == NULL)
+ {
+ printf ("Could not read %s: ", TMPFILE);
+ perror (NULL);
+ return NULL;
+ }
+
+ while (fgets (line, sizeof line, input) != NULL)
+ {
+ int i, okay = 0;
+ size_t endmac;
+ char *start, *end;
+ if (strlen (line) < 9 || line[7] != ' ')
+ { /* "#define A" */
+ printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
+ line);
+ continue;
+ }
+ if (line[8] == '_')
+ /* It's a safe identifier. */
+ continue;
+ if (result_len == result_max)
+ {
+ result_max += 10;
+ result = realloc (result, result_max * sizeof (char **));
+ if (result == NULL)
+ {
+ puts ("No more memory.");
+ exit (1);
+ }
+ }
+ start = &line[8];
+ for (end = start + 1; !isspace (*end) && *end != '\0'; ++end)
+ ;
+ result[result_len++] = strndup (start, end - start);
+
+ if (first)
+ {
+ fputs ("The following identifiers will be ignored since the compiler defines them\nby default:\n", stdout);
+ first = 0;
+ }
+ puts (result[result_len - 1]);
+ }
+ fclose (input);
+ remove (TMPFILE);
+
+ return (const char **) result;
+}
+
+
static int
-check_header (const char *file_name)
+check_header (const char *file_name, const char **except)
{
char line[BUFSIZ], *command;
FILE *input;
int result = 0;
- static const char fmt[] = "\
-echo \"#include <%s>\" |\
-%s -E -dM -ansi -pedantic %s -D_LIBC -I. -I `%s --print-prog-name=include` -\
-> %s";
command = malloc (sizeof fmt + strlen (file_name) + 2 * strlen (CC)
+ strlen (INC) + strlen (TMPFILE));
@@ -260,6 +337,7 @@ echo \"#include <%s>\" |\
{
int i, okay = 0;
size_t endmac;
+ const char **cpp;
if (strlen (line) < 9 || line[7] != ' ')
{ /* "#define A" */
printf ("Malformed input, expected '#define MACRO'\ngot '%s'\n",
@@ -278,7 +356,7 @@ echo \"#include <%s>\" |\
continue;
for (i = 0; i < NUMBER_OF_MACROS; ++i)
{
- if (!strncmp (line+8, macros[i], strlen (macros[i])))
+ if (!strncmp (line + 8, macros[i], strlen (macros[i])))
{
++okay;
break;
@@ -305,6 +383,18 @@ echo \"#include <%s>\" |\
break;
}
}
+ if (okay)
+ continue;
+ if (except != NULL)
+ for (cpp = except; *cpp != NULL; ++cpp)
+ {
+ size_t len = strlen (*cpp);
+ if (!strncmp (line + 8, *cpp, len) && isspace (line[8 + len]))
+ {
+ ++okay;
+ break;
+ }
+ }
if (!okay)
{
fputs (line, stdout);