giflib: Fix build issue on recent Android NDK versions (#25956)

* giflib: Fix build issue on recent Android NDK versions

* Apply suggestions from code review

Co-authored-by: Martin Valgur <martin.valgur@gmail.com>

* Conan v2 refactor

* WIP: Revert 5.1.x changes

---------

Co-authored-by: Martin Valgur <martin.valgur@gmail.com>
Co-authored-by: PerseoGI <perseog@jfrog.com>

recipes/giflib/5.2.x/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.15)
 project(gif LANGUAGES C)
 
 include(GNUInstallDirs)

recipes/giflib/5.2.x/conandata.yml

@@ -18,4 +18,8 @@ patches:
       patch_description: "Use strtok_s instead of strtok_r with MSVC"
       patch_type: "portability"
     - patch_file: "patches/0001-msvc-unistd.patch"
+      patch_description: "import unistd in non windows os"
+      patch_type: "portability"
     - patch_file: "patches/5.2.1-0002-msvc-export.patch"
+      patch_description: "export symbols with MSVC"
+      patch_type: "portability"

recipes/giflib/5.2.x/conanfile.py

@@ -4,7 +4,7 @@
 from conan.tools.microsoft import is_msvc
 import os
 
-required_conan_version = ">=1.53.0"
+required_conan_version = ">=2.0.9"
 
 
 class GiflibConan(ConanFile):
@@ -79,8 +79,3 @@ def package_info(self):
         self.cpp_info.libs = ["gif"]
         if is_msvc(self):
             self.cpp_info.defines.append("USE_GIF_DLL" if self.options.shared else "USE_GIF_LIB")
-
-        # TODO: to remove in conan v2
-        self.cpp_info.names["cmake_find_package"] = "GIF"
-        self.cpp_info.names["cmake_find_package_multi"] = "GIF"
-        self.env_info.PATH.append(os.path.join(self.package_folder, "bin"))