Fixes to conan build for windows. (#117)

(cherry picked from commit 562be7c)

Signed-off-by: Sam.Richards@taurich.org <Sam.Richards@taurich.org>

Author: richardssam

conan/recipes/libvmaf/all/conanfile.py

@@ -38,8 +38,8 @@ def generate(self):
 
     def build_requirements(self):
         self.tool_requires("meson/1.6.0")
-        if self.settings.arch in ["x86", "x86_64"]:
-            self.tool_requires("nasm/2.16.01")
+        #if self.settings.arch in ["x86", "x86_64"]:
+        #    self.tool_requires("nasm/2.16.01")
 
     def build(self):
         meson = Meson(self)
@@ -54,9 +54,13 @@ def package(self):
     def package_info(self):
         self.cpp_info.libs = ["vmaf"]
         self.cpp_info.includedirs = ["include", os.path.join("include", "libvmaf")]
-        if self.settings.os in ["Linux", "FreeBSD"]:
+        if self.settings.os == "Windows":
+            # MinGW requires explicit linking of the C++ standard library and math library
+            self.cpp_info.system_libs.extend(["m", "stdc++"])
+        elif self.settings.os in ["Linux", "FreeBSD"]:
             self.cpp_info.system_libs.extend(["m", "stdc++"])
         elif self.settings.os == "Macos":
             self.cpp_info.system_libs.append("c++")
         # This ensures FFmpeg's ./configure finds it easily
         self.cpp_info.set_property("pkg_config_name", "libvmaf")
+        self.cpp_info.set_property("cmake_file_name", "libvmaf")

conan/windows-setup.sh

@@ -1,7 +1,10 @@
 pacman -S --noconfirm mingw-w64-x86_64-gdb mingw-w64-x86_64-make
-pacman -S --noconfirm mingw-w64-x86_64-python-pip mingw-w64-x86_64-python-ninja
+pacman -S --noconfirm mingw-w64-x86_64-python-pip mingw-w64-x86_64-ninja
 pacman -S --noconfirm mingw-w64-x86_64-nasm mingw-w64-x86_64-yasm
 pacman -S --noconfirm base-devel
+pacman -S --needed mingw-w64-x86_64-gcc mingw-w64-x86_64-cmake
+export CONAN_HOME="/c/.c2"
+
 pip install conan
 cd recipes/ffmpeg/all
 conan export . --name ffmpeg --version 8.1