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SubjectPATCH: /proc/cflags
Date
The patch below adds an entry to /proc that represents the CFLAGS 
definition passed to gcc at compile time.

The CFLAGS value is defined in linux/compile.h as LINUX_CFLAGS.

This diff should apply to all recent kernels.

.-.
. |-
-- -- | |
\_/


--- linux/Makefile.orig Wed May 1 13:01:45 1996
+++ linux/Makefile Wed May 1 13:30:22 1996
@@ -230,6 +230,7 @@
echo \#define LINUX_COMPILE_DOMAIN ; \
fi >> .ver
@echo \#define LINUX_COMPILER \"`$(HOSTCC) -v 2>&1 | tail -1`\" >> .ver
+ @echo \#define LINUX_CFLAGS \"$(CFLAGS)\" >> .ver
@mv -f .ver $@

include/linux/version.h: ./Makefile
--- linux/include/linux/proc_fs.h.orig Wed May 1 13:11:54 1996
+++ linux/include/linux/proc_fs.h Wed May 1 13:12:43 1996
@@ -42,7 +42,8 @@
PROC_SYS,
PROC_MTAB,
PROC_MD,
- PROC_RTC
+ PROC_RTC,
+ PROC_CFLAGS
};

enum pid_directory_inos {
--- linux/fs/proc/root.c.orig Wed May 1 13:21:18 1996
+++ linux/fs/proc/root.c Wed May 1 16:20:31 1996
@@ -359,6 +359,11 @@
});
#endif

+ proc_register(&proc_root, &(struct proc_dir_entry) {
+ PROC_CFLAGS, 6, "cflags",
+ S_IFREG | S_IRUGO, 1, 0, 0,
+ });
+
proc_register( &proc_root, &(struct proc_dir_entry)
{ PROC_MTAB, 6, "mounts", S_IFREG | S_IRUGO, 1, 0, 0, } );

--- linux/fs/proc/array.c.orig Wed May 1 13:13:45 1996
+++ linux/fs/proc/array.c Wed May 1 13:22:29 1996
@@ -43,6 +43,7 @@
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/swap.h>
+#include <linux/compile.h>

#include <asm/segment.h>
#include <asm/pgtable.h>
@@ -317,6 +318,11 @@
return sprintf(buffer, "%s\n", saved_command_line);
}

+static int get_cflags(char * buffer)
+{
+ return sprintf(buffer, "%s\n", LINUX_CFLAGS);
+}
+
static struct task_struct ** get_task(pid_t pid)
{
struct task_struct ** p;
@@ -1041,6 +1047,8 @@
case PROC_RTC:
return get_rtc_status(page);
#endif
+ case PROC_CFLAGS:
+ return get_cflags(page);
}
return -EBADF;
}

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