Use kconfig- prefix to avoid tool name conflicts (from Jose Pablo Carballo)

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5496 42af7a65-404d-4744-a932-0658087f49c3

3 files changed, 63 insertions, 12 deletions

diff --git a/nuttx/libc/Kconfig b/nuttx/libc/Kconfig
index 699b3ebb2..d739b6351 100644
--- a/nuttx/libc/Kconfig
+++ b/nuttx/libc/Kconfig
@@ -72,15 +72,17 @@ config EOL_IS_EITHER_CRLF
 endchoice
 
 config LIBC_EXECFUNCS
-	bool "Enable exec[l|v] Support"
+	bool "Enable exec[l|v] / posix_spawn() Support"
 	default n
 	depends on !BINFMT_DISABLE
 	---help---
 		Enable support for the exec[l|v] family of functions that can be
-		used to start other programs, terminating the current program.
-		Typical usage is (1) first call vfork() to create a new thread, then
-		(2) call exec[l|v] to replace the new thread with a program from the
-		file system.
+		used to start other programs, terminating the current program and
+		the posix_spawn() familty of functions that can be used start other
+		programs without terminating the current program.  The typical
+		usage of the exec[l|v] functions is (1) first call vfork() to create
+		a new thread, then (2) call exec[l|v] to replace the new thread with
+		a program from the file system.
 
 		NOTE 1: This two step process start is completely unnecessary in
 		NuttX and is provided only for compatibily with Unix systems.  These
@@ -89,9 +91,11 @@ config LIBC_EXECFUNCS
 		the new thread will be terminated by the exec[l|v] call, it really
 		served no purpose other than to suport Unix compatility.
 
-		NOTE 2: Support for exec[l|v] is conditional because is requires
-		additional support for symbol tables that will not be available in
-		the typical system.
+		The posix_spawn() functions do not have this inefficiency.
+
+		NOTE 2: Support for exec[l|v] and posix_spawn() is conditional
+		because they require additional support for symbol tables that
+		will not be available in the typical system.
 
 if LIBC_EXECFUNCS
 
@@ -99,8 +103,8 @@ config EXECFUNCS_SYMTAB
 	string "Symbol table used by exec[l|v]"
 	default "g_symtab"
 	---help---
-		The exec[l|v] functions are wrapper functions that (1) call the non-
-		standard binfmt function 'exec', and then (2) exit(0).  The binfmt
+		The exec[l|v] and posix_spawn() functions are wrapper functions that
+		call the non-standard binfmt function 'exec').  The binfmt
 		function 'exec' needs to have (1) a symbol table that provides the
 		list of symbols exported by the base code, and (2) the number of
 		symbols in that table.  This selection provides the name of that
@@ -110,8 +114,8 @@ config EXECFUNCS_NSYMBOLS
 	int "Number of Symbols in the Table"
 	default 0
 	---help---
-		The exec[l|v] functions are wrapper functions that (1) call the non-
-		standard binfmt function 'exec', and then (2) exit(0).  The binfmt
+		The exec[l|v] and posix_spawn() functions are wrapper functions that
+		call the non-standard binfmt function 'exec').  The binfmt
 		function 'exec' needs to have (1) a symbol table that provides the
 		list of symbols exported by the base code, and (2) the number of
 		symbols in that table.  This selection provides the number of
diff --git a/nuttx/libc/Makefile b/nuttx/libc/Makefile
index 22dbba1d9..a76620585 100644
--- a/nuttx/libc/Makefile
+++ b/nuttx/libc/Makefile
@@ -57,6 +57,7 @@ include time/Make.defs
 include libgen/Make.defs
 include dirent/Make.defs
 include termios/Make.defs
+include spawn/Make.defs
 include queue/Make.defs
 include misc/Make.defs
 
diff --git a/nuttx/libc/spawn/Make.defs b/nuttx/libc/spawn/Make.defs
new file mode 100644
index 000000000..17d9f393a
--- /dev/null
+++ b/nuttx/libc/spawn/Make.defs
@@ -0,0 +1,46 @@
+############################################################################
+# libc/spawn/Make.defs
+#
+#   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+# Add the spawn C files to the build
+
+ifeq ($(CONFIG_LIBC_EXECFUNCS),y)
+
+CSRCS += 
+
+# Add the spawn directory to the build
+
+DEPPATH += --dep-path spawn
+VPATH += :spawn
+endif