From 87e2dd5c98e7bdd770914c2404efd8194778fc93 Mon Sep 17 00:00:00 2001
From: Igor Pashev <pashev.igor@gmail.com>
Date: Tue, 24 Mar 2015 19:34:57 +0300
Subject: Option --sun to enable syntax and features of SunOS make

---
 main.c    | 14 ++++++++++++++
 makeint.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/main.c b/main.c
index c2d4a0c..9e1a5fc 100644
--- a/main.c
+++ b/main.c
@@ -247,6 +247,10 @@ int inhibit_print_directory_flag = 0;
 
 int print_version_flag = 0;
 
+/* Enable SunOS make syntax and features.  */
+
+int sun_flag = 0;
+
 /* List of makefiles given with -f switches.  */
 
 static struct stringlist *makefiles = 0;
@@ -418,6 +422,8 @@ static const char *const usage[] =
                               Consider FILE to be infinitely new.\n"),
     N_("\
   --warn-undefined-variables  Warn when an undefined variable is referenced.\n"),
+    N_("\
+  --sun                       Enable syntax and features of SunOS make.\n"),
     NULL
   };
 
@@ -481,6 +487,7 @@ static const struct command_switch switches[] =
       "warn-undefined-variables" },
     { CHAR_MAX+6, strlist, &eval_strings, 1, 0, 0, 0, 0, "eval" },
     { CHAR_MAX+7, string, &sync_mutex, 1, 1, 0, 0, 0, "sync-mutex" },
+    { CHAR_MAX+8, flag, &sun_flag, 1, 0, 0, 0, 0, "sun" },
     { 0, 0, 0, 0, 0, 0, 0, 0, 0 }
   };
 
@@ -1691,7 +1698,10 @@ main (int argc, char **argv, char **envp)
 #else
   define_variable_cname ("MAKE_COMMAND", argv[0], o_default, 0);
 #endif
+  if (!sun_flag)
   define_variable_cname ("MAKE", "$(MAKE_COMMAND)", o_default, 1);
+  else
+  define_variable_cname ("MAKE", "$(MAKE_COMMAND) --sun", o_default, 1);
 
   if (command_variables != 0)
     {
@@ -1791,6 +1801,10 @@ main (int argc, char **argv, char **envp)
   if (no_builtin_variables_flag)
     no_builtin_rules_flag = 1;
 
+  /* SunOS make always uses second expansion.  */
+  if (sun_flag)
+    second_expansion = 1;
+
   /* Construct the list of include directories to search.  */
 
   construct_include_path (include_directories == 0
diff --git a/makeint.h b/makeint.h
index 343c30d..9cd8e2e 100644
--- a/makeint.h
+++ b/makeint.h
@@ -614,6 +614,7 @@ extern int print_version_flag, print_directory_flag, check_symlink_flag;
 extern int warn_undefined_variables_flag, trace_flag, posix_pedantic;
 extern int not_parallel, second_expansion, clock_skew_detected;
 extern int rebuilding_makefiles, one_shell, output_sync, verify_flag;
+extern int sun_flag;
 
 /* can we run commands via 'sh -c xxx' or must we use batch files? */
 extern int batch_mode_shell;
-- 
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