From b6c57ce9bf4b0735b0e3a39dc842fe69a096c172 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Thu, 18 Jun 2026 14:54:14 +0200
Subject: [PATCH] Use block() to isolate cmake variables

---
 libs/CMakeLists.txt | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/libs/CMakeLists.txt b/libs/CMakeLists.txt
index 126635687..8a9bb22ed 100644
--- a/libs/CMakeLists.txt
+++ b/libs/CMakeLists.txt
@@ -7,18 +7,18 @@ add_subdirectory(json11)
 add_subdirectory(minisat)
 add_subdirectory(sha1)
 add_subdirectory(subcircuit)
-set(_old_BUILD_SHARED_LIBS "${BUILD_SHARED_LIBS}")
-set(BUILD_SHARED_LIBS OFF)
-include(FetchContent)
-option(FMT_INSTALL OFF)
-FetchContent_Declare(
-    fmt
-    EXCLUDE_FROM_ALL
-    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/fmt
-)
-FetchContent_MakeAvailable(fmt)
-if (NOT YOSYS_WITHOUT_SLANG)
-    set(SLANG_USE_MIMALLOC OFF)
-    add_subdirectory(slang)
-endif()
-set(BUILD_SHARED_LIBS "${_old_BUILD_SHARED_LIBS}")
+block()
+    set(BUILD_SHARED_LIBS OFF)
+    include(FetchContent)
+    option(FMT_INSTALL OFF)
+    FetchContent_Declare(
+        fmt
+        EXCLUDE_FROM_ALL
+        SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/fmt
+    )
+    FetchContent_MakeAvailable(fmt)
+    if (NOT YOSYS_WITHOUT_SLANG)
+        set(SLANG_USE_MIMALLOC OFF)
+        add_subdirectory(slang)
+    endif()
+endblock()