[PATCH 4/4][Ada,DJGPP] Ada support for DJGPP

[Andris Pavenis <andris dot pavenis at iki dot fi>]

This last patch (4/4) contains DJGPP related changes to adaint.c (except one which belongs to patch 
1/4).

ChangeLog entry:

2016-07-30 Andris Pavenis <andris.pavenis@iki.fi>

* ada/adaint.c: Include process.h, signal.h, dir.h and utime.h for DJGPP.
  (DIR_SEPARATOR) define to '\\' for DJGPP.
  (__gnat_get_maximum_file_name_length): decide return value depending on
  availability of LFN for DJGPP
  (__gnat_get_file_names_case_sensitive): return 0 for DJGPP unless
  overriden in environment
  (__gnat_get_default_identifier_character_set): return '1' for DJGPP
  (__gnat_is_absolute_path): Support MS-DOS style absolute paths for DJGPP.
  (__gnat_portable_spawn): Use spewnvp for DJGPP.
  (__gnat_portable_no_block_spawn): Use spawnvp for DJGPP.
  (__gnat_portable_wait): Return 0 for DJGPP.


Andris


>From 3f96c997eb087c5ee4b90d706919074e36ee9927 Mon Sep 17 00:00:00 2001
From: Andris Pavenis <andris.pavenis@iki.fi>
Date: Mon, 25 Jul 2016 20:08:26 +0300
Subject: [PATCH 4/4] [DJGPP, Ada] DJGPP support

* ada/adaint.c: Include process.h, signal.h, dir.h and utime.h for DJGPP.
  (DIR_SEPARATOR) define to '\\' for DJGPP.
  (__gnat_get_maximum_file_name_length): decide return value depending on
  availability of LFN for DJGPP
  (__gnat_get_file_names_case_sensitive): return 0 for DJGPP unless
  overriden in environment
  (__gnat_get_default_identifier_character_set): return '1' for DJGPP
  (__gnat_is_absolute_path): Support MS-DOS style absolute paths for DJGPP.
  (__gnat_portable_spawn): Use spewnvp for DJGPP.
  (__gnat_portable_no_block_spawn): Use spawnvp for DJGPP.
  (__gnat_portable_wait): Return 0 for DJGPP.



Signed-off-by: Andris Pavenis <andris.pavenis@iki.fi>
---
 gcc/ada/adaint.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/gcc/ada/adaint.c b/gcc/ada/adaint.c
index f317865..1658acf 100644
--- a/gcc/ada/adaint.c
+++ b/gcc/ada/adaint.c
@@ -165,11 +165,16 @@ UINT CurrentCCSEncoding;
 #include <sys/wait.h>
 #endif
 
-#if defined (_WIN32)
-
+#if defined (__DJGPP__)
 #include <process.h>
 #include <signal.h>
 #include <dir.h>
+#include <utime.h>
+#undef DIR_SEPARATOR
+#define DIR_SEPARATOR '\\'
+
+#elif defined (_WIN32)
+
 #include <windows.h>
 #include <accctrl.h>
 #include <aclapi.h>
@@ -538,7 +543,11 @@ __gnat_try_lock (char *dir, char *file)
 int
 __gnat_get_maximum_file_name_length (void)
 {
+#if defined (__DJGPP__)
+  return (_use_lfn(".")) ? -1 : 8;
+#else
   return -1;
+#endif
 }
 
 /* Return nonzero if file names are case sensitive.  */
@@ -560,7 +569,7 @@ __gnat_get_file_names_case_sensitive (void)
 	{
 	  /* By default, we suppose filesystems aren't case sensitive on
 	     Windows and Darwin (but they are on arm-darwin).  */
-#if defined (WINNT) \
+#if defined (WINNT) || defined (__DJGPP__) \
   || (defined (__APPLE__) && !(defined (__arm__) || defined (__arm64__)))
 	  file_names_case_sensitive_cache = 0;
 #else
@@ -576,7 +585,7 @@ __gnat_get_file_names_case_sensitive (void)
 int
 __gnat_get_env_vars_case_sensitive (void)
 {
-#if defined (WINNT)
+#if defined (WINNT) || defined (__DJGPP__)
  return 0;
 #else
  return 1;
@@ -586,7 +595,11 @@ __gnat_get_env_vars_case_sensitive (void)
 char
 __gnat_get_default_identifier_character_set (void)
 {
+#if defined (__DJGPP__)
+  return 'p';
+#else
   return '1';
+#endif
 }
 
 /* Return the current working directory.  */
@@ -1646,7 +1659,7 @@ __gnat_is_absolute_path (char *name, int length)
 #else
   return (length != 0) &&
      (*name == '/' || *name == DIR_SEPARATOR
-#if defined (WINNT)
+#if defined (WINNT) || defined(__DJGPP__)
       || (length > 1 && ISALPHA (name[0]) && name[1] == ':')
 #endif
 	  );
@@ -2234,7 +2247,7 @@ __gnat_portable_spawn (char *args[] ATTRIBUTE_UNUSED)
 #if defined (__vxworks) || defined(__PikeOS__)
   return -1;
 
-#elif defined (_WIN32)
+#elif defined (__DJGPP__) || defined (_WIN32)
   /* args[0] must be quotes as it could contain a full pathname with spaces */
   char *args_0 = args[0];
   args[0] = (char *)xmalloc (strlen (args_0) + 3);
@@ -2606,6 +2619,12 @@ __gnat_portable_no_block_spawn (char *args[] ATTRIBUTE_UNUSED)
   /* Not supported.  */
   return -1;
 
+#elif defined(__DJGPP__)
+  if (spawnvp (P_WAIT, args[0], args) != 0)
+    return -1;
+  else
+    return 0;
+
 #elif defined (_WIN32)
 
   HANDLE h = NULL;
@@ -2649,6 +2668,7 @@ __gnat_portable_wait (int *process_status)
 
   pid = win32_wait (&status);
 
+#elif defined (__DJGPP__)
 #else
 
   pid = waitpid (-1, &status, 0);
-- 
2.7.4