fix: [build]Fix build issue without format support

add C++20 <format> support checks in Unix libraries and update logging format usage.

Log: Fix build issue without format support.

cmake/Libraries.cmake

@@ -89,6 +89,7 @@ macro(configure_unix_libs)
   include(CheckIncludeFileCXX)
   include(CheckSymbolExists)
   include(CheckCSourceCompiles)
+  include(CheckCXXSourceCompiles)
 
   check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
   if (NOT HAVE_SYS_SOCKET_H)
@@ -136,6 +137,23 @@ macro(configure_unix_libs)
     message(FATAL_ERROR "Missing library: pthread")
   endif()
 
+  # Check if <format> header is available
+  check_cxx_source_compiles("
+    #include <format>
+    int main() {
+        char buffer[100];
+        std::format_to_n(buffer, 100, \"test {}\", 42);
+        return 0;
+    }
+    " HAS_FORMAT)
+
+  # Display format support status
+  if(HAS_FORMAT)
+    message(STATUS "C++ <format> library support: YES")
+  else()
+    message(STATUS "C++ <format> library support: NO")
+  endif()
+
   if(APPLE)
     set(CMAKE_CXX_FLAGS "--sysroot ${CMAKE_OSX_SYSROOT} ${CMAKE_CXX_FLAGS} -DGTEST_USE_OWN_TR1_TUPLE=1")
     find_library(lib_ScreenSaver ScreenSaver)

src/lib/base/Log.cpp

@@ -18,7 +18,7 @@
 #include <cstring>
 #include <ctime>
 
-#ifndef __APPLE__
+#if HAS_FORMAT
 #include <format>
 #endif
 
@@ -73,7 +73,7 @@ void makeTimeString(std::vector<char> &buffer)
   localtime_r(&t, &tm);
 #endif
 
-#ifndef __APPLE__
+#if HAS_FORMAT
   std::format_to_n(
       buffer.data(), buffer.size(), "{:04}-{:02}-{:02}T{:02}:{:02}:{:02}", tm.tm_year + yearOffset,
       tm.tm_mon + monthOffset, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec
@@ -117,7 +117,7 @@ std::vector<char> makeMessage(const char *filename, int lineNumber, const char *
     bufferSize += filenameLength + lineNumberLength;
 
     std::vector<char> buffer(bufferSize);
-#ifndef __APPLE__
+#if HAS_FORMAT
     std::format_to_n(
         buffer.data(), bufferSize, "[{}] {}: {}\n\t{}:{}", timeBuffer.data(), sectionName, message, filename, lineNumber
     );
@@ -129,7 +129,7 @@ std::vector<char> makeMessage(const char *filename, int lineNumber, const char *
     return buffer;
   } else {
     std::vector<char> buffer(bufferSize);
-#ifndef __APPLE__
+#if HAS_FORMAT
     std::format_to_n(buffer.data(), bufferSize, "[{}] {}: {}", timeBuffer.data(), sectionName, message);
 #else
     snprintf(buffer.data(), bufferSize, "[%s] %s: %s", timeBuffer.data(), sectionName, message);

src/lib/platform/XWindowsClipboard.cpp

@@ -21,7 +21,11 @@
 #include <algorithm>
 #include <cstdio>
 #include <cstring>
+
+#if HAS_FORMAT
 #include <format>
+#endif
+
 #include <vector>
 
 //
@@ -637,7 +641,11 @@ void XWindowsClipboard::motifFillCache()
   // get the Motif item property from the root window
   static const int buffer_size = 18 + 20;
   char name[buffer_size];
+#if HAS_FORMAT
   std::format_to_n(name, buffer_size, "_MOTIF_CLIP_ITEM_{}", header.m_item);
+#else
+  snprintf(name, buffer_size, "_MOTIF_CLIP_ITEM_%d", header.m_item);
+#endif
   Atom atomItem = XInternAtom(m_display, name, False);
   data = "";
   if (!XWindowsUtil::getWindowProperty(m_display, root, atomItem, &data, &target, &format, False)) {
@@ -662,7 +670,11 @@ void XWindowsClipboard::motifFillCache()
   MotifFormatMap motifFormats;
   for (int32_t i = 0; i < numFormats; ++i) {
     // get Motif format property from the root window
+#if HAS_FORMAT
     std::format_to_n(name, buffer_size, "_MOTIF_CLIP_ITEM_{}", formats[i]);
+#else
+    snprintf(name, buffer_size, "_MOTIF_CLIP_ITEM_%d", formats[i]);
+#endif
     Atom atomFormat = XInternAtom(m_display, name, False);
     std::string data;
     if (!XWindowsUtil::getWindowProperty(m_display, root, atomFormat, &data, &target, &format, False)) {
@@ -737,7 +749,11 @@ bool XWindowsClipboard::motifGetSelection(const MotifClipFormat *format, Atom *a
   // part that i don't know.
   static const int buffer_size = 18 + 20;
   char name[buffer_size];
+#if HAS_FORMAT
   std::format_to_n(name, buffer_size, "_MOTIF_CLIP_ITEM_{}", format->m_data);
+#else
+  snprintf(name, buffer_size, "_MOTIF_CLIP_ITEM_%d", format->m_data);
+#endif
   Atom target = XInternAtom(m_display, name, False);
   Window root = RootWindow(m_display, DefaultScreen(m_display));
   return XWindowsUtil::getWindowProperty(m_display, root, target, data, actualTarget, nullptr, False);