From ba3fe6961798cbe9713e1d89b11f431def494f12 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Mon, 19 Jul 2010 19:24:37 +0000
Subject: [PATCH] Add support for detecting <mach-o/getsect.h> and the
 getsect() function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108737 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/configure.ac | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index be320cf3981..35cbc882263 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1287,6 +1287,9 @@ fi
 dnl Try to find Darwin specific crash reporting library.
 AC_CHECK_HEADERS([CrashReporterClient.h])
 
+dnl Try to find Darwin specific linker-section library.
+AC_CHECK_HEADERS([mach-o/getsect.h])
+
 dnl===-----------------------------------------------------------------------===
 dnl===
 dnl=== SECTION 7: Check for types and structures
@@ -1362,6 +1365,22 @@ AC_LINK_IFELSE(
   AC_DEFINE(LLVM_MULTITHREADED, 0, Build multithreading support into LLVM)
   AC_MSG_WARN([LLVM will be built thread-unsafe because atomic builtins are missing]))
 
+dnl Check for Darwin-specific getsect().
+AC_MSG_CHECKING(for getsect())
+AC_COMPILE_IFELSE(
+  AC_LANG_SOURCE(
+    [[#include <mach-o/getsect.h>
+      int main() {
+        unsigned long p;
+        return (int)getsect("__DATA","´__pass_info", &p);
+      }
+    ]]),
+  AC_MSG_RESULT(yes)
+    AC_DEFINE(HAVE_GETSECT, 1, Have Darwin getsect() support),
+  AC_MSG_RESULT(no)
+    AC_DEFINE(HAVE_GETSECT, 1, Have Darwin getsect() support)
+)
+
 
 dnl===-----------------------------------------------------------------------===
 dnl===
-- 
2.34.1