From 318de6070119f7ace92fa542ffb85b0a1c9f9479 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Fri, 5 Jun 2009 23:46:34 +0000
Subject: [PATCH] More portability checks for CMake's config.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72975 91177308-0d34-0410-b5e6-96231b3b80d8
---
 CMakeLists.txt                     | 4 +++-
 cmake/config-ix.cmake              | 3 +++
 include/llvm/Config/config.h.cmake | 8 ++++----
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0de1e08cf78..81333987bed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -150,11 +150,13 @@ include(config-ix)
 
 option(LLVM_ENABLE_PIC "Build Position-Independent Code" OFF)
 
+set(ENABLE_PIC 0)
 if( LLVM_ENABLE_PIC )
   if( SUPPORTS_FPIC_FLAG )
     message(STATUS "Building with -fPIC")
     add_llvm_definitions(-fPIC)
-  else( SUPPORTS_FPIC_FLAG )
+    set(ENABLE_PIC 1)
+ else( SUPPORTS_FPIC_FLAG )
     message(STATUS "Warning: -fPIC not supported.")
   endif()
 endif()
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 7cddf59343e..c18ac44172f 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -1,6 +1,7 @@
 
 # include checks
 include(CheckIncludeFile)
+check_include_file(alloca.h HAVE_ALLOCA_H)
 check_include_file(argz.h HAVE_ARGZ_H)
 check_include_file(assert.h HAVE_ASSERT_H)
 check_include_file(dirent.h HAVE_DIRENT_H)
@@ -34,6 +35,7 @@ check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
 check_include_file(sys/stat.h HAVE_SYS_STAT_H)
 check_include_file(sys/time.h HAVE_SYS_TIME_H)
 check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
 check_include_file(termios.h HAVE_TERMIOS_H)
 check_include_file(unistd.h HAVE_UNISTD_H)
 check_include_file(utime.h HAVE_UTIME_H)
@@ -47,6 +49,7 @@ check_library_exists(dl dlopen "" HAVE_LIBDL)
 # function checks
 include(CheckSymbolExists)
 include(CheckFunctionExists)
+check_symbol_exists(alloca alloca.h HAVE_ALLOCA)
 check_symbol_exists(getpagesize unistd.h HAVE_GETPAGESIZE)
 check_symbol_exists(getrusage sys/resource.h HAVE_GETRUSAGE)
 check_symbol_exists(setrlimit sys/resource.h HAVE_SETRLIMIT)
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index ed77874b780..33e2e002e23 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -18,17 +18,17 @@
 #undef ENABLE_CBE_PRINTF_A
 
 /* Define if position independent code is enabled */
-#undef ENABLE_PIC
+#cmakedefine ENABLE_PIC ${ENABLE_PIC}
 
 /* Define if threads enabled */
 #cmakedefine ENABLE_THREADS ${ENABLE_THREADS}
 
 /* Define to 1 if you have `alloca', as a function or macro. */
-#undef HAVE_ALLOCA
+#cmakedefine HAVE_ALLOCA ${HAVE_ALLOCA}
 
 /* Define to 1 if you have <alloca.h> and it should be used (not on Ultrix).
    */
-#undef HAVE_ALLOCA_H
+#cmakedefine HAVE_ALLOCA_H ${HAVE_ALLOCA_H}
 
 /* Define to 1 if you have the `argz_append' function. */
 #undef HAVE_ARGZ_APPEND
@@ -414,7 +414,7 @@
 #cmakedefine HAVE_SYS_TYPES_H ${HAVE_SYS_TYPES_H}
 
 /* Define to 1 if you have <sys/wait.h> that is POSIX.1 compatible. */
-#undef HAVE_SYS_WAIT_H
+#cmakedefine HAVE_SYS_WAIT_H ${HAVE_SYS_WAIT_H}
 
 /* Define to 1 if the system has the type `uint64_t'. */
 #undef HAVE_UINT64_T