kernel: add mingw

Add the option to build a cross-compiler for kernel type 'mingw'.
The resulting cross-compiler can be used to build applications on a Linux host
that can be run on a Windows target.

Compiler is build using the mingwrt and w32-api packages aviable from the
MinGW project (http://sourceforge.net/projects/mingw).

The windows headers (w32-api package) are extracting with the kernel_headers
step The libraries and other headers from both packages are build and
installed in the various steps of libc

Signed-off-by: Bart vdr Meulen <bartvdrmeulen@gmail.com>
[yann.morin.1998@anciens.enib.fr: fix kernel headers comment, don't "return 0"]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

7 files changed, 85 insertions, 3 deletions

diff --git a/config/kernel.in b/config/kernel.in
index 630eae64..446bd6bf 100644
--- a/config/kernel.in
+++ b/config/kernel.in
@@ -8,6 +8,10 @@ config BARE_METAL
     bool
     default n
 
+config MINGW32
+    bool
+    default n
+
 # Each target OS (aka kernel) that support shared libraries can select
 # this, so the user can decide whether or not to build a shared library
 # enabled toolchain
diff --git a/config/kernel/mingw32.in b/config/kernel/mingw32.in
new file mode 100644
index 00000000..1496d052
--- /dev/null
+++ b/config/kernel/mingw32.in
@@ -0,0 +1,32 @@
+# mingw32 config options
+
+config KERNEL_mingw32
+    select MINGW32
+    help
+      Build a toolchain targeting systems running Windows as host
+
+choice
+    bool
+    prompt "Windows api version"
+
+# Don't remove next line
+# CT_INSERT_VERSION_BELOW
+config W32API_V_3_14
+    bool
+    prompt "3.14"
+
+config W32API_V_select
+    bool
+    prompt "Other version"
+
+endchoice
+
+config W32API_VERSION
+    string
+    prompt "W32 api version" if W32API_V_select
+# Don't remove next line
+# CT_INSERT_VERSION_STRING_BELOW
+    default "3.14" if W32API_V_3_14
+    help
+      Enter the version number of the windows api files to use
+
diff --git a/config/libc.in b/config/libc.in
index 58bc320b..2ee46ba3 100644
--- a/config/libc.in
+++ b/config/libc.in
@@ -35,10 +35,16 @@ config LIBC_SUPPORT_LINUXTHREADS
     default n
     select LIBC_SUPPORT_THREADS_ANY
 
+config LIBC_SUPPORT_WIN32THREADS
+    bool
+    default n
+    select LIBC_SUPPORT_THREADS_ANY
+
 config THREADS
     string
     default "nptl"          if THREADS_NPTL
     default "linuxthreads"  if THREADS_LINUXTHREADS
+    default "win32"         if THREADS_WIN32THREADS
     default "none"          if THREADS_NONE || LIBC_none
 #                              No C library, no threads!
 
@@ -51,6 +57,7 @@ choice
     prompt "Threading implementation to use:"
     default THREADS_NPTL           if LIBC_SUPPORT_NPTL
     default THREADS_LINUXTHREADS   if LIBC_SUPPORT_LINUXTHREADS && ! LIBC_SUPPORT_NPTL
+    default THREADS_WIN32          if LIBC_SUPPORT_WIN32THREADS
     default THREADS_NONE           if ! LIBC_SUPPORT_THREADS_ANY
 
 config THREADS_NPTL
@@ -63,6 +70,11 @@ config THREADS_LINUXTHREADS
     prompt "linuxthreads"
     depends on LIBC_SUPPORT_LINUXTHREADS
 
+config THREADS_WIN32THREADS
+    bool
+    prompt "win32"
+    depends on LIBC_SUPPORT_WIN32THREADS
+
 config THREADS_NONE
     bool
     prompt "none"
diff --git a/config/libc/eglibc.in b/config/libc/eglibc.in
index 0dc6848f..b13571b6 100644
--- a/config/libc/eglibc.in
+++ b/config/libc/eglibc.in
@@ -1,5 +1,5 @@
 # eglibc options
-# depends on ! BARE_METAL && ARCH_USE_MMU
+# depends on ! MINGW32 && ! BARE_METAL && ARCH_USE_MMU
 
 config LIBC_eglibc
     select LIBC_SUPPORT_NPTL
diff --git a/config/libc/glibc.in b/config/libc/glibc.in
index b2fc88cf..3c904bc5 100644
--- a/config/libc/glibc.in
+++ b/config/libc/glibc.in
@@ -1,5 +1,5 @@
 # glibc options
-# depends on ! BARE_METAL && ARCH_USE_MMU
+# depends on ! MINGW32 && ! BARE_METAL && ARCH_USE_MMU
 
 config LIBC_glibc
     select LIBC_SUPPORT_NPTL
diff --git a/config/libc/mingw.in b/config/libc/mingw.in
new file mode 100644
index 00000000..2c7bb0f9
--- /dev/null
+++ b/config/libc/mingw.in
@@ -0,0 +1,34 @@
+# mingw options
+# depends on MINGW32
+
+config LIBC_mingw
+    bool
+    select LIBC_SUPPORT_WIN32THREADS
+    help
+      The de-facto standard for Mingw distributions.
+
+choice
+    bool
+    prompt "Mingw runtime version"
+
+# Don't remove next line
+# CT_INSERT_VERSION_BELOW
+config MINGWRT_V_3_18
+    bool
+    prompt "3.18"
+
+config MINGWRT_V_select
+    bool
+    prompt "Other version"
+
+endchoice
+
+config MINGWRT_VERSION
+    string
+    prompt "Mingw runtime version" if MINGWRT_V_select
+# Don't remove next line
+# CT_INSERT_VERSION_STRING_BELOW
+    default "3.18" if MINGWRT_V_3_18
+    help
+      Enter the version number of the mingw runtime files to use
+
diff --git a/config/libc/uClibc.in b/config/libc/uClibc.in
index b63239d1..aba8674d 100644
--- a/config/libc/uClibc.in
+++ b/config/libc/uClibc.in
@@ -1,5 +1,5 @@
 # uClibc options
-# depends on ! BARE_METAL
+# depends on ! MINGW32 && ! BARE_METAL
 
 config LIBC_uClibc
     select LIBC_SUPPORT_LINUXTHREADS