[lldb][AIX] GetOpt support in AIX

[DhruvSrivastavaX]

This PR is in reference to porting LLDB on AIX.

Link to discussions on llvm discourse and github:

1. https://discourse.llvm.org/t/port-lldb-to-ibm-aix/80640
2. Extending LLDB to work on AIX #101657
   The complete changes for porting are present in this draft PR:
   Extending LLDB to work on AIX #102601

Adding changes for minimal build for lldb binary on AIX.
getopt.h is missing in AIX, so instead relying on LLDB's getopt functions.

Review Request: @labath @DavidSpickett

[llvmbot]

@llvm/pr-subscribers-lldb

Author: Dhruv Srivastava (DhruvSrivastavaX)

Changes

This PR is in reference to porting LLDB on AIX.

Link to discussions on llvm discourse and github:

1. https://discourse.llvm.org/t/port-lldb-to-ibm-aix/80640
2. Extending LLDB to work on AIX #101657
   The complete changes for porting are present in this draft PR:
   Extending LLDB to work on AIX #102601

Adding changes for minimal build for lldb binary on AIX.
getopt.h is missing in AIX, so instead relying on LLDB's getopt functions.

Review Request: @labath @DavidSpickett

---

Full diff: https://github.com/llvm/llvm-project/pull/120574.diff

2 Files Affected:

• (modified) lldb/include/lldb/Host/HostGetOpt.h (+1-1)
• (modified) lldb/include/lldb/Host/common/GetOptInc.h (+2-2)

diff --git a/lldb/include/lldb/Host/HostGetOpt.h b/lldb/include/lldb/Host/HostGetOpt.h
index 52cfdf4dbb89c2..b2b436e64a692f 100644
--- a/lldb/include/lldb/Host/HostGetOpt.h
+++ b/lldb/include/lldb/Host/HostGetOpt.h
@@ -9,7 +9,7 @@
 #ifndef LLDB_HOST_HOSTGETOPT_H
 #define LLDB_HOST_HOSTGETOPT_H
 
-#if !defined(_MSC_VER) && !defined(__NetBSD__)
+#if !defined(_MSC_VER) && !defined(__NetBSD__) && !defined(_AIX)
 
 #include <getopt.h>
 #include <unistd.h>
diff --git a/lldb/include/lldb/Host/common/GetOptInc.h b/lldb/include/lldb/Host/common/GetOptInc.h
index 3fb9add4795417..c9c9e2496d5f96 100644
--- a/lldb/include/lldb/Host/common/GetOptInc.h
+++ b/lldb/include/lldb/Host/common/GetOptInc.h
@@ -11,11 +11,11 @@
 
 #include "lldb/lldb-defines.h"
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) || defined(_AIX)
 #define REPLACE_GETOPT
 #define REPLACE_GETOPT_LONG
 #endif
-#if defined(_MSC_VER) || defined(__NetBSD__)
+#if defined(_MSC_VER) || defined(__NetBSD__) || defined(_AIX)
 #define REPLACE_GETOPT_LONG_ONLY
 #endif
 

[DavidSpickett]

LGTM

Should I merge this on your behalf?

[DhruvSrivastavaX]

Yes, Thanks. I dont have the permissions to merge so it would be great if you do.
Also, how can I gain the privilege to merge my changes once they are approved?

[DavidSpickett]

https://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access

My understanding is that this also allows you to add reviewers directly, and other non-commit things that are useful.

[DhruvSrivastavaX]

Great. Thanks alot!