Misc. portability fixes.

Review URL: http://codereview.chromium.org/42337

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1538 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

samples/shell.cc

@@ -26,9 +26,10 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <v8.h>
-#include <cstring>
-#include <cstdio>
-#include <cstdlib>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 
 void RunShell(v8::Handle<v8::Context> context);

src/conversions-inl.h

@@ -30,6 +30,7 @@
 
 #include <math.h>
 #include <float.h>         // required for DBL_MAX and on Win32 for finite()
+#include <stdarg.h>
 
 // ----------------------------------------------------------------------------
 // Extra POSIX/ANSI functions for Win32/MSVC.

src/platform-linux.cc

@@ -42,8 +42,8 @@
 #include <sys/types.h>  // mmap & munmap
 #include <sys/mman.h>   // mmap & munmap
 #include <sys/stat.h>   // open
-#include <sys/fcntl.h>  // open
-#include <unistd.h>     // getpagesize
+#include <fcntl.h>      // open
+#include <unistd.h>     // sysconf
 #include <execinfo.h>   // backtrace, backtrace_symbols
 #include <strings.h>    // index
 #include <errno.h>
@@ -230,14 +230,14 @@ bool OS::IsOutsideAllocatedSpace(void* address) {
 
 
 size_t OS::AllocateAlignment() {
-  return getpagesize();
+  return sysconf(_SC_PAGESIZE);
 }
 
 
 void* OS::Allocate(const size_t requested,
                    size_t* allocated,
                    bool executable) {
-  const size_t msize = RoundUp(requested, getpagesize());
+  const size_t msize = RoundUp(requested, sysconf(_SC_PAGESIZE));
   int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0);
   void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
   if (mbase == MAP_FAILED) {

src/unicode.cc

@@ -28,8 +28,8 @@
 // This file was generated at 2008-11-25 16:02:40.592795
 
 #include "unicode-inl.h"
-#include <cstdlib>
-#include <cstdio>
+#include <stdlib.h>
+#include <stdio.h>
 
 namespace unibrow {