libidn: fix MSVC build, WIP

Author: Martin Valgur

recipes/libidn/all/conanfile.py

@@ -3,11 +3,11 @@
 from conan import ConanFile
 from conan.errors import ConanInvalidConfiguration
 from conan.tools.build import cross_building
-from conan.tools.env import Environment, VirtualBuildEnv, VirtualRunEnv
+from conan.tools.env import VirtualBuildEnv, VirtualRunEnv
 from conan.tools.files import get, rmdir, export_conandata_patches, apply_conandata_patches, copy, chdir, replace_in_file, rm
-from conan.tools.gnu import AutotoolsToolchain, Autotools
-from conan.tools.microsoft import unix_path, is_msvc
-from conan.tools.scm import Version
+from conan.tools.gnu import AutotoolsToolchain, Autotools, AutotoolsDeps
+from conan.tools.layout import basic_layout
+from conan.tools.microsoft import unix_path, is_msvc, check_min_vs
 
 required_conan_version = ">=1.33.0"
 
@@ -22,8 +22,16 @@ class LibIdnConan(ConanFile):
 
     package_type = "library"
     settings = "os", "arch", "compiler", "build_type"
-    options = {"shared": [True, False], "fPIC": [True, False], "threads": [True, False]}
-    default_options = {"shared": False, "fPIC": True, "threads": True}
+    options = {
+        "shared": [True, False],
+        "fPIC": [True, False],
+        "threads": [True, False],
+    }
+    default_options = {
+        "shared": False,
+        "fPIC": True,
+        "threads": True,
+    }
 
     @property
     def _settings_build(self):
@@ -39,8 +47,11 @@ def config_options(self):
     def configure(self):
         if self.options.shared:
             self.options.rm_safe("fPIC")
-        del self.settings.compiler.libcxx
-        del self.settings.compiler.cppstd
+        self.settings.rm_safe("compiler.libcxx")
+        self.settings.rm_safe("compiler.cppstd")
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
 
     def requirements(self):
         self.requires("libiconv/1.17")
@@ -55,7 +66,7 @@ def build_requirements(self):
             if not self.conf.get("tools.microsoft.bash:path", check_type=str):
                 self.tool_requires("msys2/cci.latest")
         if is_msvc(self):
-            self.tool_requires("automake/1.16.5")
+            self.tool_requires("cccl/1.3")
 
     def source(self):
         get(self, **self.conan_data["sources"][self.version], strip_root=True)
@@ -67,36 +78,25 @@ def generate(self):
             env = VirtualRunEnv(self)
             env.generate(scope="build")
         tc = AutotoolsToolchain(self)
-        tc.libs = []
         if not self.options.shared:
             tc.defines.append("LIBIDN_STATIC")
+        env = tc.environment()
         if is_msvc(self):
-            if Version(self.settings.compiler.version) >= "12":
+            env.define("CC", "cccl")
+            env.define("CXX", "cccl")
+            env.define("LD", "cccl")
+            if check_min_vs(self, 180, raise_invalid=False):
                 tc.extra_cflags.append("-FS")
-            tc.extra_ldflags += ["-L{}".format(p.replace("\\", "/")) for p in self.deps_cpp_info.lib_paths]
         yes_no = lambda v: "yes" if v else "no"
         tc.configure_args += [
             "--enable-threads={}".format(yes_no(self.options.threads)),
-            "--with-libiconv-prefix={}".format(unix_path(self, self.dependencies["libiconv"].cpp_info.libdirs[0])),  # FIXME
+            "--with-libiconv-prefix={}".format(unix_path(self, self.dependencies["libiconv"].package_folder)),
             "--disable-nls",
             "--disable-rpath",
         ]
-        tc.generate()
-
-        if is_msvc(self):
-            env = Environment()
-            automake_conf = self.dependencies.build["automake"].conf_info
-            compile_wrapper = unix_path(self, automake_conf.get("user.automake:compile-wrapper", check_type=str))
-            ar_wrapper = unix_path(self, automake_conf.get("user.automake:lib-wrapper", check_type=str))
-            env.define("CC", f"{compile_wrapper} cl -nologo")
-            env.define("CXX", f"{compile_wrapper} cl -nologo")
-            env.define("LD", "link -nologo")
-            env.define("AR", f'{ar_wrapper} "lib -nologo"')
-            env.define("NM", "dumpbin -symbols")
-            env.define("OBJDUMP", ":")
-            env.define("RANLIB", ":")
-            env.define("STRIP", ":")
-            env.vars(self).save_script("conanbuild_msvc")
+        tc.generate(env)
+        deps = AutotoolsDeps(self)
+        deps.generate()
 
     def _patch_sources(self):
         apply_conandata_patches(self)
@@ -106,6 +106,12 @@ def _patch_sources(self):
             else:
                 ssize = "signed long int"
             replace_in_file(self, os.path.join(self.source_folder, "lib", "stringprep.h"), "ssize_t", ssize)
+        if self.settings.os == "Windows":
+            # Otherwise tries to create a symlink from GNUmakefile to itself, which fails on Windows
+            replace_in_file(self, os.path.join(self.source_folder, "configure"),
+                            '"$GNUmakefile") CONFIG_LINKS="$CONFIG_LINKS $GNUmakefile:$GNUmakefile" ;;', "")
+            replace_in_file(self, os.path.join(self.source_folder, "configure"),
+                            'ac_config_links="$ac_config_links $GNUmakefile:$GNUmakefile"', "")
 
     def build(self):
         self._patch_sources()