From 74dcf6908123534def35cac52589a334718220e4 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 31 May 2022 12:42:47 -0500
Subject: [PATCH] pass --with-our-malloc on MinGW

---
 CMakeLists.txt             | 3 +++
 extern/fftw/CMakeLists.txt | 4 ++++
 extern/fftw/MODIFIED.md    | 3 +++
 3 files changed, 10 insertions(+)
 create mode 100644 extern/fftw/MODIFIED.md

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2cd16396..bbaf81eb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,6 +92,9 @@ if (SYSTEM_FFTW)
   list(APPEND DEPENDENCIES_LEGACY_LDFLAGS ${FFTW_LDFLAGS})
   message(STATUS "Using system-installed FFTW")
 else()
+  if (WIN32 AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    set(WITH_OUR_MALLOC ON CACHE BOOL "aaa" FORCE)
+  endif()
   add_subdirectory(extern/fftw EXCLUDE_FROM_ALL)
   list(APPEND DEPENDENCIES_INCLUDE_DIRS extern/fftw/api)
   list(APPEND DEPENDENCIES_LIBRARIES fftw3)
diff --git a/extern/fftw/CMakeLists.txt b/extern/fftw/CMakeLists.txt
index 3eb96aaa..369e665d 100644
--- a/extern/fftw/CMakeLists.txt
+++ b/extern/fftw/CMakeLists.txt
@@ -16,6 +16,7 @@ option (BUILD_TESTS "Build tests" ON)
 option (ENABLE_OPENMP "Use OpenMP for multithreading" OFF)
 option (ENABLE_THREADS "Use pthread for multithreading" OFF)
 option (WITH_COMBINED_THREADS "Merge thread library" OFF)
+option (WITH_OUR_MALLOC "Use own aligned malloc()/free() implementation" OFF)
 
 option (ENABLE_FLOAT "single-precision" OFF)
 option (ENABLE_LONG_DOUBLE "long-double precision" OFF)
@@ -310,6 +311,9 @@ endif ()
 
 add_library (${fftw3_lib} ${SOURCEFILES})
 target_include_directories (${fftw3_lib} INTERFACE $<INSTALL_INTERFACE:include>)
+if (WITH_OUR_MALLOC)
+  target_compile_options (${fftw3_lib} PRIVATE WITH_OUR_MALLOC)
+endif ()
 if (MSVC AND NOT (CMAKE_C_COMPILER_ID STREQUAL "Intel"))
   target_compile_definitions (${fftw3_lib} PRIVATE /bigobj)
 endif ()
diff --git a/extern/fftw/MODIFIED.md b/extern/fftw/MODIFIED.md
new file mode 100644
index 00000000..0dcc2a62
--- /dev/null
+++ b/extern/fftw/MODIFIED.md
@@ -0,0 +1,3 @@
+this is a modified version of FFTW for usage in Furnace.
+
+it adds a `WITH_OUR_MALLOC` option to CMakeListst.txt, which was absent in the original release.