FW: Patch for undeclared __NR_pread - glibc 2.2.2

["Steven J. Magnani" <steve at digidescorp dot com>]

Hi,

Here is a patch for the "`__NR_pread' undeclared" error that occurs when
glibc-2.2.2 is compiled with recent Linux kernels (2.6.6+, perhaps
earlier ones). It's not particularly pretty, but it has the advantage of
being limited to a single file. This issue appears to have been resolved
in glibc-2.3.3 by changing the many .c files involved.

The crosstool ChangeLog mentions similar problems with gcc-3.4.1  /
glibc-2.2.5  /  linux-2.6.7, a similar patch would probably work there.

Steve Magnani
Digital Design Corporation

--- glibc-2.2.2/sysdeps/unix/sysv/linux/kernel-features.h 2001-01-23
16:07:25.000000000 -0600
+++ glibc-2.2.2/sysdeps/unix/sysv/linux/kernel-features.h.patch
2004-11-09 14:36:34.649230300 -0600
@@ -53,6 +53,20 @@
 #if __LINUX_KERNEL_VERSION >= 131584
 # define __ASSUME_PREAD_SYSCALL  1
 # define __ASSUME_PWRITE_SYSCALL 1
+
+/* pread/pwrite were renamed to pread64/pwrite64 somewhere between
2.4.4 & 2.6.6 */
+#include <sys/syscall.h>
+#ifdef __NR_pread64  /* Newer kernels renamed but it's the same.  */
+# ifndef __NR_pread
+#  define __NR_pread __NR_pread64
+# endif
+#endif
+
+#ifdef __NR_pwrite64  /* Newer kernels renamed but it's the same.  */
+# ifndef __NR_pwrite
+#  define __NR_pwrite __NR_pwrite64
+# endif
+#endif
 #endif
 
 /* When was `poll' introduced?  */




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