From 8965922219ea55ffd15ad5f4bbf7641330e03a27 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Thu, 16 Aug 2018 10:32:34 +0200
Subject: Added ability for static builds

---
 CMakeLists.txt | 9 ++++++++-
 README.md      | 7 +++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4c222d71..0cf55eb8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,13 @@ project(nextpnr)
 option(BUILD_GUI "Build GUI" ON)
 option(BUILD_PYTHON "Build Python Integration" ON)
 option(BUILD_TESTS "Build GUI" OFF)
+option(STATIC_BUILD "Create static build" OFF)
+
+set(link_param "")
+if (STATIC_BUILD)
+    set(Boost_USE_STATIC_LIBS   ON)
+    set(link_param "-static")
+endif()
 
 # List of families to build
 set(FAMILIES generic ice40 ecp5)
@@ -211,7 +218,7 @@ foreach (family ${ARCH})
         # Include family-specific source files to all family targets and set defines appropriately
         target_include_directories(${target} PRIVATE ${family}/ ${CMAKE_CURRENT_BINARY_DIR}/generated/)
         target_compile_definitions(${target} PRIVATE NEXTPNR_NAMESPACE=nextpnr_${family} ARCH_${ufamily} ARCHNAME=${family})
-        target_link_libraries(${target} LINK_PUBLIC ${Boost_LIBRARIES})
+        target_link_libraries(${target} LINK_PUBLIC ${Boost_LIBRARIES} ${link_param})
         if (NOT MSVC)
             target_link_libraries(${target} LINK_PUBLIC pthread)
         endif()
diff --git a/README.md b/README.md
index e9f197cd..a47a06a7 100644
--- a/README.md
+++ b/README.md
@@ -127,6 +127,13 @@ cmake -DARCH=ice40 -DCMAKE_BUILD_TYPE=Debug -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF -
 make -j$(nproc)
 ```
 
+To make static build relase for iCE40 architecture use the following:
+
+```
+cmake -DARCH=ice40 -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF -DSTATIC_BUILD=ON .
+make -j$(nproc)
+```
+
 Notes for developers
 --------------------
 
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