Bug#1120617: openmpi: FTBFS on hurd-amd64 since PATH_MAX is not defined

[Drew Parsons]

Source: openmpi
Followup-For: Bug #1120617
X-Debbugs-Cc: debian-hurd at lists.debian.org
User: debian-hurd at lists.debian.org
Usertags: hurd-amd64
Control: tags -1 ftbfs

Linux sets PATH_MAX to 4096 in /usr/include/linux/limits.h
(included in sys/param.h)

We already have a debian patch for hurd, so easy to update it to add
3rd-party/romio341/mpl/src/str/mpl_str.c.

Updated build_hurd patch attached (patched against salsa debian/latest)
-------------- next part --------------
Description: Fix build problems on hurd-i386
 This patch allows Open MPI to build on Debian GNU/HURD.
 .
 Also, the memory:linux MCA component is disabled, since its use of POSIX API
 in malloc hooks called very early at startup causes troubles.
 .
 Also changes by Samuel Thibault <sthibault at debian.org>
 See bugs.debian.org/846965
Author: Pino Toscano <pino at debian.org>
Forwarded: partially
Last-Update: 2018-10-24

Index: openmpi/ompi/include/ompi_config.h
===================================================================
--- openmpi.orig/ompi/include/ompi_config.h	2025-11-13 12:15:05.326539024 +0100
+++ openmpi/ompi/include/ompi_config.h	2025-11-13 12:15:05.320309280 +0100
@@ -28,6 +28,10 @@
 
 #include "opal_config.h"
 
+#ifndef PATH_MAX /* Hurd */
+#define PATH_MAX 65535
+#endif
+
 #define OMPI_IDENT_STRING OPAL_IDENT_STRING
 
 /***********************************************************************
Index: openmpi/opal/mca/base/mca_base_var.c
===================================================================
--- openmpi.orig/opal/mca/base/mca_base_var.c	2025-11-13 12:15:05.326539024 +0100
+++ openmpi/opal/mca/base/mca_base_var.c	2025-11-13 12:15:05.321442824 +0100
@@ -61,6 +61,14 @@
 #include "opal/util/printf.h"
 #include "opal/util/show_help.h"
 
+#ifndef MAXPATHLEN /* Hurd */
+#define MAXPATHLEN 65535
+#endif
+
+#ifndef PATH_MAX  /* Hurd */
+#define PATH_MAX 65535
+#endif
+
 /*
  * local variables
  */
Index: openmpi/ompi/mca/fbtl/posix/fbtl_posix_preadv.c
===================================================================
--- openmpi.orig/ompi/mca/fbtl/posix/fbtl_posix_preadv.c	2025-11-13 12:15:05.326539024 +0100
+++ openmpi/ompi/mca/fbtl/posix/fbtl_posix_preadv.c	2025-11-13 12:15:05.322394375 +0100
@@ -39,6 +39,10 @@
 static ssize_t mca_fbtl_posix_preadv_single (ompio_file_t *fh, struct flock *lock, int *lock_counter);
 
 
+#ifndef IOV_MAX
+#define IOV_MAX 1024
+#endif
+
 ssize_t mca_fbtl_posix_preadv (ompio_file_t *fh )
 {
     ssize_t bytes_read=0;
Index: openmpi/ompi/mca/fbtl/posix/fbtl_posix_pwritev.c
===================================================================
--- openmpi.orig/ompi/mca/fbtl/posix/fbtl_posix_pwritev.c	2025-11-13 12:15:05.326539024 +0100
+++ openmpi/ompi/mca/fbtl/posix/fbtl_posix_pwritev.c	2025-11-13 12:15:05.323135878 +0100
@@ -37,6 +37,10 @@
 static ssize_t mca_fbtl_posix_pwritev_generic (ompio_file_t *fh, struct flock *lock, int *lock_counter );
 static ssize_t mca_fbtl_posix_pwritev_single (ompio_file_t *fh, struct flock *lock, int *lock_counter );
 
+#ifndef IOV_MAX
+#define IOV_MAX 1024
+#endif
+
 ssize_t  mca_fbtl_posix_pwritev(ompio_file_t *fh )
 {
     ssize_t bytes_written=0;
Index: openmpi/3rd-party/romio341/mpl/src/str/mpl_str.c
===================================================================
--- openmpi.orig/3rd-party/romio341/mpl/src/str/mpl_str.c	2025-11-13 12:14:42.194014704 +0100
+++ openmpi/3rd-party/romio341/mpl/src/str/mpl_str.c	2025-11-13 12:15:53.193653561 +0100
@@ -18,6 +18,11 @@
 #include <sys/param.h>
 #endif
 
+/* Non-linux systems like hurd might not define PATH_MAX in param.h */
+#ifndef PATH_MAX
+#define PATH_MAX        4096
+#endif
+
 #ifdef MPL_HAVE_TIME_H
 #include <time.h>
 #endif