Allow specifying page size at configure time

Author: fsateler

configure.ac

@@ -6,5 +6,23 @@ AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2 foreign color-tests parallel-tests])
 AM_PROG_CC_C_O
 AC_PROG_CXX
 
+PAGESIZE=auto
+AC_ARG_WITH([page-size],
+	    AS_HELP_STRING([--with-page-size=SIZE], [Specify default pagesize (default auto)]),
+	    PAGESIZE=$withval
+	    )
+
+AS_IF([test "x$PAGESIZE" = xauto],
+	AS_IF([which getconf &>/dev/null], [
+	       PAGESIZE=`getconf PAGESIZE &>/dev/null || getconf PAGE_SIZE &>/dev/null`
+	])
+	AS_IF([test "x$PAGESIZE" = x], [
+	       PAGESIZE=4096
+	])
+)
+
+AC_DEFINE_UNQUOTED(PAGESIZE, ${PAGESIZE})
+AC_MSG_RESULT([Setting page size to ${PAGESIZE}])
+
 AC_CONFIG_FILES([Makefile src/Makefile tests/Makefile patchelf.spec])
 AC_OUTPUT

src/patchelf.cc

@@ -40,13 +40,7 @@ unsigned char * contents = 0;
 
 
 static unsigned int getPageSize(){
-#ifdef MIPSEL
-    /* The lemote fuloong 2f kernel defconfig sets a page size of
-       16KB. */
-    return 4096 * 4;
-#else
-    return 4096;
-#endif
+    return PAGESIZE;
 }