early-access version 2853

externals/vcpkg/ports/tinyexpr/CMakeLists.txt

@@ -0,0 +1,48 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(tinyexpr LANGUAGES C)
+
+include(CheckSymbolExists)
+include(GNUInstallDirs)
+
+if(WIN32 AND BUILD_SHARED_LIBS)
+    add_library(tinyexpr tinyexpr.c exports.def)
+else()
+    add_library(tinyexpr tinyexpr.c)
+endif()
+
+target_include_directories(
+    tinyexpr
+    PUBLIC
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# https://stackoverflow.com/questions/32816646/can-cmake-detect-if-i-need-to-link-to-libm-when-using-pow-in-c
+if(NOT POW_FUNCTION_EXISTS AND NOT NEED_LINKING_AGAINST_LIBM)
+    check_symbol_exists(pow "math.h" POW_FUNCTION_EXISTS)
+    if(NOT POW_FUNCTION_EXISTS)
+        unset(POW_FUNCTION_EXISTS CACHE)
+        list(APPEND CMAKE_REQUIRED_LIBRARIES m)
+        check_symbol_exists(pow "math.h" POW_FUNCTION_EXISTS)
+        if(POW_FUNCTION_EXISTS)
+            set(NEED_LINKING_AGAINST_LIBM True CACHE BOOL "" FORCE)
+        else()
+            message(FATAL_ERROR "Failed making the pow() function available")
+        endif()
+    endif()
+endif()
+
+if(NEED_LINKING_AGAINST_LIBM)
+    target_link_libraries(tinyexpr PUBLIC m)
+endif()
+
+set_target_properties(tinyexpr PROPERTIES PUBLIC_HEADER tinyexpr.h)
+
+install(TARGETS tinyexpr EXPORT unofficial-tinyexpr-config)
+
+install(
+    EXPORT unofficial-tinyexpr-config
+    NAMESPACE unofficial::tinyexpr::
+    DESTINATION share/unofficial-tinyexpr
+    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+)