fix: small improvements in the CMakeLists.txt

CMakeLists.txt

@@ -3,9 +3,10 @@ project(curtle VERSION 0.1.1 LANGUAGES C)
 
 include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
+include(CTest)
 
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED True)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
 
 add_library(curtle STATIC src/vector.c)
 
@@ -15,10 +16,7 @@ target_include_directories(curtle
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
-find_library(MATH_LIB m)
-if (MATH_LIB)
-    target_link_libraries(curtle PUBLIC ${MATH_LIB})
-endif ()
+target_link_libraries(curtle PUBLIC m)
 
 install(TARGETS curtle
         EXPORT curtleTargets
@@ -35,6 +33,7 @@ install(
 
 install(EXPORT curtleTargets
         FILE curtleTargets.cmake
+        NAMESPACE curtle::
         DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/curtle
 )
 
@@ -55,5 +54,7 @@ install(FILES
         DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/curtle
 )
 
+if(BUILD_TESTING)
     enable_testing()
     add_subdirectory(tests)
+endif()