From 31b51f299ac12f9e4d56a18e6020127f359cb426 Mon Sep 17 00:00:00 2001
From: Matt McCormick <matt.mccormick@kitware.com>
Date: Sat, 3 Aug 2024 08:42:52 -0400
Subject: [PATCH] COMP: libminc WASI undefined symbols

wasm-ld-18: error: /ITK-build/lib/libitkminc2-5.4.a(files.c.o): undefined symbol: system
wasm-ld-18: error: /ITK-build/lib/libitkminc2-5.4.a(files.c.o): undefined symbol: system
wasm-ld-18: error: /ITK-build/lib/libitkminc2-5.4.a(volume.c.o): undefined symbol: gethostname
wasm-ld-18: error: /ITK-build/lib/libitkminc2-5.4.a(volume.c.o): undefined symbol: getpid
---
 .../MINC/src/libminc/libsrc/minc_convenience.c   |  9 ++++++++-
 .../ThirdParty/MINC/src/libminc/libsrc2/volume.c | 11 +++++++++--
 .../src/libminc/volume_io/Prog_utils/files.c     | 16 ++++++++++++++++
 3 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/Modules/ThirdParty/MINC/src/libminc/libsrc/minc_convenience.c b/Modules/ThirdParty/MINC/src/libminc/libsrc/minc_convenience.c
index 5e41caef2a6..f342dd4f697 100644
--- a/Modules/ThirdParty/MINC/src/libminc/libsrc/minc_convenience.c
+++ b/Modules/ThirdParty/MINC/src/libminc/libsrc/minc_convenience.c
@@ -1486,6 +1486,7 @@ MNCAPI int micreate_ident( char * id_str, size_t length )
     char *temp_ptr;
     char time_str[26];
     int result;
+    pid_t pid;
 
     if (gethostname(host_str, sizeof(host_str)) != 0) {
         strcpy(host_str, "unknown");
@@ -1508,6 +1509,12 @@ MNCAPI int micreate_ident( char * id_str, size_t length )
 #endif
     strftime(time_str, sizeof(time_str), "%Y.%m.%d.%H.%M.%S", &tm_buf);
 
+#ifdef __wasi__
+    pid = 0;
+#else
+    pid = getpid();
+#endif
+
     result = snprintf(id_str, length, "%s%c%s%c%s%c%u%c%u", 
                       user_str, 
                       MI_IDENT_SEP,
@@ -1515,7 +1522,7 @@ MNCAPI int micreate_ident( char * id_str, size_t length )
                       MI_IDENT_SEP,
                       time_str, 
                       MI_IDENT_SEP,
-                      getpid(), 
+                      pid, 
                       MI_IDENT_SEP,
                       identx++);
     return (result);
diff --git a/Modules/ThirdParty/MINC/src/libminc/libsrc2/volume.c b/Modules/ThirdParty/MINC/src/libminc/libsrc2/volume.c
index 6a74cedd96e..93e7bd8e191 100644
--- a/Modules/ThirdParty/MINC/src/libminc/libsrc2/volume.c
+++ b/Modules/ThirdParty/MINC/src/libminc/libsrc2/volume.c
@@ -72,9 +72,10 @@ static int _generate_ident( char * id_str, size_t length )
   char *temp_ptr;
   char time_str[26];
   int result;
+  pid_t pid;
   
 // Linking in ws2_32  for gethostname is problematic with static libraries.
-#ifdef _WIN32
+#if defined(_WIN32) || defined(__wasi__)
   strcpy(host_str, "unknown");
 #else
   if (gethostname(host_str, sizeof(host_str)) != 0) {
@@ -99,11 +100,17 @@ static int _generate_ident( char * id_str, size_t length )
 #endif
   strftime(time_str, sizeof(time_str), "%Y.%m.%d.%H.%M.%S", &tm_buf);
   
+#ifdef __wasi__
+  pid = 0;
+#else
+  pid = getpid();
+#endif
+
   result = snprintf(id_str, length, "%s:%s:%s:%u:%u", 
                     user_str, 
                     host_str, 
                     time_str, 
-                    getpid(), 
+                    pid, 
                     identx++);
   return result;
 }
diff --git a/Modules/ThirdParty/MINC/src/libminc/volume_io/Prog_utils/files.c b/Modules/ThirdParty/MINC/src/libminc/volume_io/Prog_utils/files.c
index 7c86aa31417..5491e6bd6a6 100644
--- a/Modules/ThirdParty/MINC/src/libminc/volume_io/Prog_utils/files.c
+++ b/Modules/ThirdParty/MINC/src/libminc/volume_io/Prog_utils/files.c
@@ -489,6 +489,9 @@ VIOAPI  VIO_Status  copy_file(
     concat_to_string( &command, " " );
     concat_to_string( &command, dest_expanded );
 
+#ifdef __wasi__
+    status = VIO_ERROR;
+#else
     if( system( command ) != 0 )
     {
         print_error( "Error copying file %s to %s: ",
@@ -498,6 +501,7 @@ VIOAPI  VIO_Status  copy_file(
     }
     else
         status = VIO_OK;
+#endif
 
     delete_string( src_expanded );
     delete_string( dest_expanded );
@@ -534,6 +538,9 @@ VIOAPI  VIO_Status  move_file(
     concat_to_string( &command, " " );
     concat_to_string( &command, dest_expanded );
 
+#ifdef __wasi__
+    status = VIO_ERROR;
+#else
     if( system( command ) != 0 )
     {
         print_error( "Error moving file %s to %s: ",
@@ -543,6 +550,7 @@ VIOAPI  VIO_Status  move_file(
     }
     else
         status = VIO_OK;
+#endif
 
     delete_string( src_expanded );
     delete_string( dest_expanded );
@@ -1013,13 +1021,21 @@ VIOAPI  VIO_Status  open_file(
         tmp_name = get_temporary_filename();
 
         (void) snprintf( command, sizeof(command), "gunzip -c %s > %s", expanded, tmp_name );
+#ifdef __wasi__
+        command_status = VIO_ERROR;
+#else
         command_status = system( command );
+#endif
 
         /* Try again, using bzip2 */
         if( command_status != 0 )
         {
             (void) snprintf( command, sizeof(command), "bunzip2 -c %s > %s", expanded, tmp_name );
+#ifdef __wasi__
+            command_status = VIO_ERROR;
+#else
             command_status = system( command );
+#endif
         }
 
         /* Check for failure */