Add GMTL - Generic Math Template Library recipe

recipes/gmtl/all/conandata.yml

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+sources:
+  # Newer versions at the top
+  "0.7.1":
+    url: [
+      "https://github.com/psyinf/gmtl/archive/refs/tags/0.7.1.tar.gz",
+    ]
+    sha256: "abaf1fcbc70ed0e72b313c0a1e526117ccf889edf732b994221f82151c4a8fbe"
+

recipes/gmtl/all/conanfile.py

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+from conan import ConanFile
+from conan.errors import ConanInvalidConfiguration
+from conan.tools.files import apply_conandata_patches, export_conandata_patches, get, copy
+from conan.tools.build import check_min_cppstd
+from conan.tools.scm import Version
+from conan.tools.layout import basic_layout
+import os
+
+
+required_conan_version = ">=1.52.0"
+
+
+class PackageConan(ConanFile):
+    name = "gmtl"
+    description = "Generic Math Template Library"
+    # Use short name only, conform to SPDX License List: https://spdx.org/licenses/
+    # In case not listed there, use "LicenseRef-<license-file-name>"
+    license = "LGPL"
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://ggt.sourceforge.net/html/main.html"
+    # no "conan" and project name in topics. Use topics from the upstream listed on GH
+    # Keep 'hearder-only' as topic
+    topics = ("linear-algebra", "collision", "vector", "matrix", "template", "math", "header-only")
+    settings = "os", "arch", "compiler", "build_type"  # even for header only
+    no_copy_source = True  # do not copy sources to build folder for header only projects, unless, need to apply patches
+
+    # no exports_sources attribute, but export_sources(self) method instead
+    # this allows finer grain exportation of patches per version
+    def export_sources(self):
+        export_conandata_patches(self)
+
+    def layout(self):
+        # src_folder must use the same source folder name the project
+        basic_layout(self, src_folder="gmtl")
+
+    def requirements(self):
+        # prefer self.requires method instead of requires attribute
+        return
+
+    # same package ID for any package
+    def package_id(self):
+        self.info.clear()
+
+    def validate(self):
+        # compiler subsettings are not available when building with self.info.clear()
+        return
+
+    # if another tool than the compiler or CMake is required to build the project (pkgconf, bison, flex etc)
+    def build_requirements(self):
+        return
+
+    def source(self):
+        # download source package and extract to source folder
+        get(self, **self.conan_data["sources"][self.version], destination=self.source_folder, strip_root=True)
+
+    # not mandatory when there is no patch, but will suppress warning message about missing build() method
+    def build(self):
+        # The attribute no_copy_source should not be used when applying patches in build
+        apply_conandata_patches(self)
+
+    # copy all files to the package folder
+    def package(self):
+        copy(self, pattern="LICENSE", dst=os.path.join(self.package_folder, "licenses"), src=self.source_folder)
+        copy(
+            self,
+            pattern="*.h",
+            dst=os.path.join(self.package_folder, "include"),
+            src=os.path.join(self.source_folder, "."),
+        )
+
+    def package_info(self):
+        # folders not used for header-only
+        self.cpp_info.bindirs = []
+        self.cpp_info.libdirs = []
+
+

recipes/gmtl/all/test_package/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.8)
+
+project(test_package C) # if the project is pure C
+project(test_package CXX) # if the project uses c++
+
+find_package(gmtl REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} test_package.cpp)
+# don't link to ${CONAN_LIBS} or CONAN_PKG::package
+target_link_libraries(${PROJECT_NAME} PRIVATE gmtl::gmtl)
+# In case the target project need a specific C++ standard
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_14)

recipes/gmtl/all/test_package/conanfile.py

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+from conan import ConanFile
+from conan.tools.build import can_run
+from conan.tools.cmake import cmake_layout, CMake
+import os
+
+
+# It will become the standard on Conan 2.x
+class TestPackageConan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "CMakeDeps", "CMakeToolchain", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def layout(self):
+        cmake_layout(self)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if can_run(self):
+            bin_path = os.path.join(self.cpp.build.bindirs[0], "test_package")
+            self.run(bin_path, env="conanrun")

recipes/gmtl/all/test_package/test_package.cpp

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+#include <cstdlib>
+#include <iostream>
+#include "gmtl/gmtl.h"
+
+
+int main(void) {
+
+	gmtl::Vec4f     homogeneousVec;
+    gmtl::Vec4f     homogeneousVec2;
+    gmtl::Matrix44f mat;
+
+    homogeneousVec2 = mat * homogeneousVec;
+
+    gmtl::xform(homogeneousVec2, mat, homogeneousVec);
+    return EXIT_SUCCESS;
+}

recipes/gmtl/all/test_v1_package/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.8)
+
+project(test_package C) # if the project is pure C
+project(test_package CXX) # if the project uses c++
+
+include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+conan_basic_setup(TARGETS)
+
+find_package(gmtl REQUIRED CONFIG)
+
+# Re-use the same source file from test_package folder
+add_executable(${PROJECT_NAME} ../test_package/test_package.cpp)
+# don't link to ${CONAN_LIBS} or CONAN_PKG::package
+target_link_libraries(${PROJECT_NAME} PRIVATE gmtl::gmtl)
+# in case the target project requires a C++ standard
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_14)

recipes/gmtl/all/test_v1_package/conanfile.py

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+from conans import ConanFile, CMake
+from conan.tools.build import cross_building
+import os
+
+
+# legacy validation with Conan 1.x
+class TestPackageV1Conan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "cmake", "cmake_find_package_multi"
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if not cross_building(self):
+            bin_path = os.path.join("bin", "test_package")
+            self.run(bin_path, run_environment=True)

recipes/gmtl/config.yml

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+versions:
+  # Newer versions at the top
+  "0.7.1":
+    folder: all