📥 Add fmt

CMakeLists.txt

@@ -14,6 +14,7 @@ endif (NOT CMAKE_BUILD_TYPE)
 
 include(ExternalProject)
 include(cmake/binaryen.cmake)
+include(cmake/fmt.cmake)
 
 include_directories(
     src

cmake/fmt.cmake

+ExternalProject_Add(
+    fmt
+    URL https://github.com/fmtlib/fmt/archive/5.3.0.zip
+    PREFIX fmt
+    INSTALL_COMMAND ""
+    TEST_COMMAND ""
+    CMAKE_ARGS
+        -DCMAKE_BUILD_TYPE=Release
+        -DFMT_DOC=OFF
+        -DFMT_TEST=OFF
+)
+
+ExternalProject_Get_Property(fmt source_dir)
+ExternalProject_Get_Property(fmt binary_dir)
+
+file(MAKE_DIRECTORY ${source_dir}/include)
+
+add_library(libfmt STATIC IMPORTED)
+add_dependencies(libfmt fmt)
+
+set_target_properties(libfmt
+    PROPERTIES
+    IMPORTED_LOCATION ${binary_dir}/libfmt.a
+    INTERFACE_INCLUDE_DIRECTORIES ${source_dir}/include
+)

src/CMakeLists.txt

@@ -4,6 +4,7 @@ add_executable(kyut
 
 target_link_libraries(kyut
     libbinaryen
+    libfmt
 )
 
 if (WIN32)

src/kyut.cpp

-#include <iostream>
+#include <cstdio>
 
+#include <fmt/format.h>
 #include <wasm-io.h>
 
 int main(int argc, char *argv[]) {
     try {
         if (argc != 3) {
-            std::cerr << "WebAssembly digital watermarker." << std::endl;
-            std::cerr << "usage: kyut <input file> <watermark>" << std::endl;
+            fmt::print(stderr,
+                       "WebAssembly digital watermarker.\n"
+                       "usage: kyut <input file> <watermark>\n");
 
             return 1;
         }
@@ -14,7 +16,7 @@ int main(int argc, char *argv[]) {
         wasm::Module module;
         wasm::ModuleReader{}.readBinary(argv[1], module);
     } catch (const std::exception &e) {
-        std::cerr << e.what() << '\n';
+        fmt::print(stderr, "error: {}\n", e.what());
 
         return 1;
     }