[S] Change in flashrom[master]: doc: Add Windows MSYS2 build instructions

[Anastasia Klimchuk (Code Review)]

Anastasia Klimchuk has submitted this change. ( https://review.coreboot.org/c/flashrom/+/75189?usp=email )

(

6 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: doc: Add Windows MSYS2 build instructions
......................................................................

doc: Add Windows MSYS2 build instructions

Change-Id: I847428535547242ff32af92c4fe8477241826814
Signed-off-by: Thomas Heijligen 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/75189
Reviewed-by: Stefan Reinauer 
Tested-by: build bot (Jenkins) 
Reviewed-by: Anastasia Klimchuk 
Reviewed-by: Alexander Goncharov 
---
M doc/dev_guide/building_from_source.rst
1 file changed, 16 insertions(+), 1 deletion(-)

Approvals:
  Alexander Goncharov: Looks good to me, approved
  build bot (Jenkins): Verified
  Anastasia Klimchuk: Looks good to me, approved
  Stefan Reinauer: Looks good to me, approved

diff --git a/doc/dev_guide/building_from_source.rst b/doc/dev_guide/building_from_source.rst
index 9c2959e..7503e9e 100644
--- a/doc/dev_guide/building_from_source.rst
+++ b/doc/dev_guide/building_from_source.rst
@@ -81,7 +81,22 @@
             cmocka-dev pciutils-dev libusb-dev libjaylink-dev

* Windows
-    .. todo:: Add build instructions to build under MSYS2, CYGWIN or cross compiling from Linux
+    * MSYS2
+        Install `MSYS2 https://www.msys2.org/`_ and ensure it is `fully updated https://www.msys2.org/docs/updating/`_.
+
+        * ``libpci`` is not available through the package manager and pci based programmer are not supported on Windows.
+
+        In the MINGW64 shell run::
+
+            pacman -Sy \
+            mingw-w64-x86_64-gcc mingw-w64-x86_64-meson mingw-w64-x86_64-ninja mingw-w64-x86_64-pkg-config mingw-w64-x86_64-python-sphinx \
+            mingw-w64-x86_64-cmocka mingw-w64-x86_64-libusb mingw-w64-x86_64-libftdi mingw-w64-x86_64-libjaylink-git
+
+        For building flashrom as 32-bit application, use the MSYS2 MINGW32 shell and run::
+
+            pacman -Sy \
+            mingw-w64-i686-gcc mingw-w64-i686-meson mingw-w64-i686-ninja mingw-w64-i686-pkg-config mingw-w64-i686-python-sphinx \
+            mingw-w64-i686-cmocka mingw-w64-i686-libusb mingw-w64-i686-libftdi mingw-w64-i686-libjaylink-git

* MacOS
     * Homebrew