ginkgo: disable autodiscovery of ccache + fix build of 1.7.0 with msvc & C++20

recipes/ginkgo/all/conandata.yml

@@ -10,21 +10,25 @@ sources:
     sha256: "1b0e907b4046cdf7cef16d1730c12ba812b38f2764f49f74f454239a27f63596"
 patches:
   "1.7.0":
-    - patch_file: "patches/libc++-chrono.patch"
+    - patch_file: "patches/1.7.0-0001-libc++-chrono.patch"
       patch_type: "official"
       patch_description: "Fix for std::chrono incompatibility with libc++"
       patch_source: "https://github.com/ginkgo-project/ginkgo/pull/1463"
+    - patch_file: "patches/1.7.0-0002-msvc-c++20.patch"
+      patch_type: "portability"
+      patch_description: "Fix compilation with Visual Studio and C++20"
+      patch_source: "https://github.com/ginkgo-project/ginkgo/pull/1496"
   "1.4.0":
-    - patch_file: "patches/windows-symbols.patch"
+    - patch_file: "patches/1.4.0-0001-windows-symbols.patch"
       patch_type: "official"
       patch_description: "Fix for excessive link symbol count with MSVC"
       patch_source: "https://github.com/ginkgo-project/ginkgo/pull/868"
   "1.3.0":
-    - patch_file: "patches/cmake-fixes.patch"
+    - patch_file: "patches/1.3.0-0001-cmake-fixes.patch"
       patch_type: "official"
       patch_description: "Fixes for CMake issues"
       patch_source: "https://github.com/ginkgo-project/ginkgo/pull/713, https://github.com/ginkgo-project/ginkgo/pull/720"
-    - patch_file: "patches/windows-iterator.patch"
+    - patch_file: "patches/1.3.0-0002-windows-iterator.patch"
       patch_type: "official"
       patch_description: "Fixes for MSVC compatibility"
       patch_source: "https://github.com/ginkgo-project/ginkgo/pull/665"

recipes/ginkgo/all/conanfile.py

@@ -101,8 +101,51 @@ def build_requirements(self):
     def source(self):
         get(self, **self.conan_data["sources"][self.version], strip_root=True)
 
+    def _get_visual_generator(self):
+        compiler_version = str(self.settings.compiler.version)
+        if self.settings.compiler == "msvc":
+            compiler_version = {
+                "170": "11",
+                "180": "12",
+                "190": "14",
+                "191": "15",
+                "192": "16",
+                "193": "17",
+            }[compiler_version]
+
+        visual_gen_suffix = {
+            "8": "8 2005",
+            "9": "9 2008",
+            "10": "10 2010",
+            "11": "11 2012",
+            "12": "12 2013",
+            "14": "14 2015",
+            "15": "15 2017",
+            "16": "16 2019",
+            "17": "17 2022",
+        }[compiler_version]
+
+        return f"Visual Studio {visual_gen_suffix}"
+
     def generate(self):
         tc = CMakeToolchain(self)
+
+        # Since 1.5.0, force MSBuild generator if:
+        # - msvc & shared
+        # - user has set tools.cmake.cmaketoolchain:generator to Ninja
+        # It's a workaround for LINK : fatal error LNK1189: library limit of 65535 objects exceeded
+        # See https://github.com/ginkgo-project/ginkgo/issues/1495#issuecomment-1841983036
+        # and https://github.com/microsoft/vcpkg/pull/34280#discussion_r1351515284
+        if Version(self.version) >= "1.5.0" and is_msvc(self) and self.options.shared:
+            if self.conf.get("tools.cmake.cmaketoolchain:generator") == "Ninja":
+                visual_generator = self._get_visual_generator()
+                self.output.warning(
+                    f"You asked for Ninja generator, but fallback to {visual_generator}, "
+                    "otherwise it will fail during creation of DLL with "
+                    "LINK : fatal error LNK1189: library limit of 65535 objects exceeded"
+                )
+                tc.generator = visual_generator
+
         tc.variables["GINKGO_BUILD_TESTS"] = False
         tc.variables["GINKGO_BUILD_EXAMPLES"] = False
         tc.variables["GINKGO_BUILD_BENCHMARKS"] = False
@@ -117,6 +160,8 @@ def generate(self):
             tc.variables["GINKGO_BUILD_DPCPP"] = False
         tc.variables["GINKGO_BUILD_HWLOC"] = False
         tc.variables["GINKGO_BUILD_MPI"] = False
+        if Version(self.version) >= "1.4.0":
+            tc.variables["GINKGO_WITH_CCACHE"] = False
         tc.generate()
 
     def build(self):

recipes/ginkgo/all/patches/1.7.0-0002-msvc-c++20.patch

@@ -0,0 +1,12 @@
+--- a/include/ginkgo/core/base/std_extensions.hpp
++++ b/include/ginkgo/core/base/std_extensions.hpp
+@@ -73,7 +73,8 @@ using void_t = typename detail::make_void<Ts...>::type;
+ // Disable deprecation warnings when using standard > C++14
+ inline bool uncaught_exception() noexcept
+ {
+-#if __cplusplus > 201402L
++// MSVC uses _MSVC_LANG as __cplusplus
++#if (defined(_MSVC_LANG) && _MSVC_LANG > 201402L) || __cplusplus > 201402L
+     return std::uncaught_exceptions() > 0;
+ #else
+     return std::uncaught_exception();