doc: Move outdated documentation to legacy

Change-Id: I0ceba9a993e8b1cdef4ff6a784bfd69c08107d88
BUG: 811311
Signed-off-by: Vijay Bellur <vijay@gluster.com>
Reviewed-on: http://review.gluster.com/3116
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/doc/legacy/porting_guide.txt b/doc/legacy/porting_guide.txt
new file mode 100644
index 000000000..5705cd964
--- /dev/null
+++ b/doc/legacy/porting_guide.txt
@@ -0,0 +1,45 @@
+		       GlusterFS Porting Guide
+                       -----------------------
+
+* General setup
+
+The configure script will detect the target platform for the build.
+All platform-specific CFLAGS, macro definitions should be done
+in configure.ac
+
+Platform-specific code can be written like this:
+
+#ifdef GF_DARWIN_HOST_OS
+  /* some code specific to Darwin */
+#endif
+
+* Coding guidelines
+
+In general, avoid glibc extensions. For example, nested functions don't work
+on Mac OS X. It is best to stick to C99.
+
+When using library calls and system calls, pay attention to the
+portability notes. As far as possible stick to POSIX-specified behavior.
+Do not use anything expressly permitted by the specification. For example,
+some fields in structures may be present only on certain platforms. Avoid
+use of such things.
+
+Do not pass values of constants such as F_*, O_*, errno values, etc. across
+platforms.
+
+Please refer compat-errno.h for more details about errno handling inside
+glusterfs for cross platform.
+
+* Specific issues
+
+- The argp library is available only on Linux through glibc, but for other
+  platforms glusterfs has already included argp-standalone library which will
+  statically linked during the glusterfs build.
+
+- Extended attribute calls (setxattr, listxattr, etc.) have differing prototypes
+  on different platforms. See compat.h for macro definitions to resolve this, also
+  read out the specific extended attribute documentation for your platforms.
+
+------------------------------------------
+Last revised: Thu Feb 28 13:58:07 IST 2008
+------------------------------------------